Jump to content

List of marginocephalian type specimens

Add links
From Wikipedia, the free encyclopedia

This list of specimens is a comprehensive catalogue of all the type specimens and their scientific designations for each of the genera and species that are included in the clade marginocephalia.

Painting by paleoartist Charles R. Knight of Agathaumas, the first named marginocephalian, from 1897

Marginocephalia is a clade of ornithischian dinosaurs that includes some of the most well-known Mesozoic animals, such as Triceratops and Pachycephalosaurus. The group is united by, and is named for, the presence of a bony margin formed mostly from the parietal and squamosal bones at the posterior end of the skull. Although the first marginocephalian known to scientists, Agathaumas, was described in 1872 by Edward Drinker Cope,[1] the clade itself was not recognized until the latter part of the 20th century when Paul Sereno first united the two major groups, ceratopsians and pachycephalosaurians into a single clade.[2]

Marginocephalians first appeared in the Jurassic period as small bipedal animals.[3] However, they saw an apparent increase in diversity during the Early Cretaceous period which culminated in the emergence of megafaunal forms by the end of the period that weighed in excess of five metric tons.[4] Most of their diversity is known from North America and Asia, with a few remains attributed to the group from Europe,[5] South America,[6] and Australia.[7]

Scope and terminology

[edit]

This list will include the type fossils of each marginocephalian species. In paleontology, a type specimen is one which is definitionally a member of a biological taxon. Additional specimens can only be "referred" to these taxa if an expert deems them sufficiently similar to the type and publishes that opinion in the scientific literature.

There is no complete, canonical list of all dinosaur taxa or holotype specimens. Attempts are regularly published in the form of books, such as the Princeton Field Guide to Dinosaurs by Gregory Paul[8] and Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages by Thomas Holtz and Luis Rey.[9] Where appropriate, The Paleobiology Database and Fossilworks, which are both online databases of named fossil taxa, are used to supplement the entries from published encyclopedias which are missing or data-deficient.

This list will also be updated regularly as new scientific descriptions are published and new taxa are named. The most recently named marginocephalian is Sasayamagnomus saegusai, which was named in June 2024 by Tomonori Tanaka, Kentaro Chiba, Tadahiro Ikeda, and Michael J. Ryan.[10]

Type system

[edit]

Types are also used to diagnose higher-level taxa than an individual. One individual might represent the "type specimen" of a particular species. This species would in turn represent the "type species" of a particular genus, unless it is referred to a previously described genus. Most dinosaur genera are monospecific, therefore most type specimens are also the type species of their respective genera. On this list, the type species of a genus is only noted when it belongs to a genus with multiple referred species, such as Psittacosaurus or Chasmosaurus. Furthermore, when an animal is different enough from its close relatives that it is given its own family, it is conventional in dinosaur systematics to name a family after the first described, most famous, or most abundant genus assigned to it. Therefore, on this list, the type species of any type genus for a family or sub-family level taxon is also noted when appropriate.

There are several different varieties of type specimen when referring to fossil animals:[11]

  • Holotype: This is the most common and simplest form of type specimen. A holotype is the first material of a fossil specimen that is described in the scientific literature. In order to qualify as a true holotype, all of the fossils of the type must belong to the same individual animal. All type specimens on this list are holotypes, unless otherwise indicated.
  • Paratype(s): These are described in the same publication as the holotype. A paratype is designated when the fossil material is diagnostic enough to belong to the same species as the holotype, but it is not from the same individual animal. In these cases, the holotype and paratype(s) are collectively called the "type series" for that taxon. On this list, paratypes are noted in the same entry as their associated holotype.
  • Neotype: When a holotype specimen is lost, destroyed, or otherwise unable to be studied further by scientists, a new type specimen for that taxon is required in order to identify future material. On this list, neotypes are only given their own entries when the holotype was never formally given a specimen number, otherwise they are noted in the entry for the holotype.
  • Syntype(s): This is a type series in which no single specimen is selected to serve as a holotype, nor are any designated as paratypes. This is typically done if the fossil material is believed to be from multiple animals, but none of the individual animals were well-preserved enough to provide a complete list of diagnostic characters. These are also sometimes called "cotypes" in publications, although this is discouraged by the ICZN.
  • Lectotype: When a single type specimen from a series of syntypes is designated as the new primary type specimen in a subsequent publication, this is considered to be a lectotype. On this list, lectotypes are given their own entries.
  • Paralectotype(s): When a lectotype is designated from a series of syntypes, the remaining syntypes become paralectotypes as part of a reorganized type series. On this list, paralectotypes are noted alongside the list entry for the lectotype of their respective series.
  • Plastotype: Sometimes, if a cast of a type specimen is made and the original type specimen is lost or destroyed, the cast can be used for the purposes of diagnostic referral to a taxon. Plastotypes are only given their own entries on this list if the holotype was not given a specimen number. Otherwise, they are noted alongside the entry for the holotype.

All name-bearing type specimens (i.e. holotypes, lectotypes, neotypes, and syntypes) have unique entries on this list, and non-name-bearing types (i.e. paratypes, paralectotypes, and topotypes) are noted alongside their name-bearing counterpart.

Validity

[edit]

Some described species are later determined to be invalid by subsequent scientific publications. However, invalid species are sometimes resurrected, such as in the case of Brontosaurus,[12] and sometimes the validity of a species can be controversial among researchers (e.g. the case of Torosaurus and Triceratops[13][14]). For the purposes of neutrality and completeness, all described species and genera of marginocephalians are included, even those that have been subsequently considered invalid by subsequent scientific publications.

Naming conventions and terminology follow the International Code of Zoological Nomenclature (ICZN).[11] Technical terms used include:

  • Junior synonym: A name which describes the same taxon as a previously published name. If two or more taxa are formally designated and the type specimens are later assigned to the same taxon, the first to be published (in chronological order) is the senior synonym, and all other instances are junior synonyms. Senior synonyms are generally used, except by special decision of the ICZN, but junior synonyms cannot be used again, even if deprecated. Junior synonymy is often subjective, unless the genera described were both based on the same type specimen.
  • Nomen dubium (Latin for "dubious name"): A name describing a fossil with no unique diagnostic features. This can be an extremely controversial designation, and as such, they are only notated when their supposedly dubious status has been formally published. Furthermore, if the scientific community has yet to reach a consensus on the validity of a name or taxon, the ongoing nature of the controversy will be stated.
  • Nomen nudum (Latin for "naked name"): A name that has appeared in print but has not yet been formally published by the standards of the ICZN. Nomina nuda (the plural form) are invalid, and are not included on this list.
  • Preoccupied name: A name that is formally published, but which has already been used for another taxon. This second use is invalid (as are all subsequent uses) and the name must be replaced.

Omissions

[edit]

Some taxa of marginocephalians are not included on this list. Nomina nuda are not included because a type does not become recognized by the ICZN until it is published in a scientific journal with a full description.

Some misidentified taxa are also not included so long as there is a scientific consensus with regard to the specimen in question. If a specimen is later referred to a taxon outside marginocephalia, it is not included on this list. However, specimens that are identified as marginocephalians in publications subsequent to their initial description are included under the name they are given within marginocephalia. For example, Pachycephalosaurus was originally described as a species of the theropod genus Troodon.[15] This is noted where appropriate, but there is no entry on the list under the name Troodon wyomingensis because the specimen itself is now referred to a taxon within marginocephalia.

Referred taxa are only included on the list as separate entries when their initial description includes a unique type specimen (e.g. Triceratops obtusus or Dracorex hogwartsia).

List of specimens

[edit]
  • Binomial name: All animals species are given a unique binomial name, typically consisting of Latin or Greek words which are used to formally and scientifically identify each species.
  • Catalogue number: In most museum collections, each fossil specimen will be given a unique catalogue number which is published with the description of the fossils after they are prepared. This serves as a formal name for every single described fossil so that authors are able to refer to individual fossil discoveries in the scientific literature by name.
  • Institution: Most published fossils are stored in museum collections or at universities. This is also true of type specimens, many of which are on display in museums around the world. If a type specimen has been lost, the last known location of the type is listed.
  • Age: The geological stage from which the specimen was recovered is listed, when it is known. The exact age of some geological formations is not known. If this is the case, a range of possible ages is given.
  • Unit: Most fossils are recovered from named geologic formations (e.g. the Morrison Formation or the Hell Creek Formation). When this is not the case, a city or landmark near the locality from which the fossil was recovered is listed.
  • Material: The vast majority of fossils do not preserve the complete skeleton of an animal. In these cases, the specific bones which are fossilized have been listed.
  • Notes: Other general information, such as the validity status of the taxon in question, or any other material in the type series may be listed here.
Binomial Name Catalogue Number Institution Age Unit Material Notes Images
Achelousaurus horneri MOR 485[16] Museum of the Rockies Late Campanian Upper Two Medicine Formation, Alberta[16] Mostly complete skull[16]
The holotype on display in Colorado
Acrotholus audeti TMP 2008.045.0001[17] Royal Tyrell Museum[17] Santonian Milk River Formation, Alberta[17] Frontoparietal skull dome[17]
Agathaumas sylvestris AMNH 4000[1] American Museum of Natural History[1] Late Maastrichtian Lance Formation, Wyoming[1] Numerous vertebrae, a partial pelvis, and several ribs[1] Nomen dubium, generally considered a chimera or synonymous with Triceratops[18]
Illustration of the holotype material
Agujaceratops mariscalensis UTEP P.37.7.086[19] Texas Memorial Museum Late Campanian Aguja Formation, Texas[19] Partial skull[19] Type species of Agujaceratops, originally described as Chasmosaurus mariscalensis[19][20]
The holotype on display in Austin
Agujaceratops mavericus TMM 43098-1[21] Texas Memorial Museum Late Campanian Aguja Formation, Texas[21] Nearly complete skull[21]
Ajkaceratops kozmai MTM V2009.192.1[5] Hungarian Natural History Museum Santonian Csehbánya Formation, Hungary[5] Partial beak and rostrum[5]
The holotype without the dentary
Alaskacephale gangloffi UAM AK-493-V-001[22] University of Alaska Museum[22] Early Maastrichtian Prince Creek Formation, Alaska[22]
Albalophosaurus yamaguchiorum SBEI 176[23] Hakusan City Board of Education[23] Barremian[24] Kuwajima Formation, Japan[23] Incomplete skull and jawbones[23] May be an ornithopod or some other type of ornithischian[25]
Albertaceratops nesmoi TMP.2001.26.1[26] Royal Tyrrell Museum[26] Middle Campanian Oldman Formation, Alberta[26] Complete skull and postcranial fragments
Holotype skull without the postcranial elements
Amtocephale gobiensis MPC-D 100/1203[27] Mongolian Natural History Museum Uncertain (Albian to Santonian?)

[28]

Bayan Shireh Formation, Mongolia[27] Partial skull dome[27]
Anchiceratops longirostris NMC 8535[29] Canadian Museum of Nature[29] Early Maastrichtian[29] Horseshoe Canyon Formation, Alberta Complete skull[29] Nomen dubium, may be synonymous with A. ornatus or may represent sexual dimorphism[30]
Anchiceratops ornatus AMNH 5251[31] American Museum of Natural History Early Maastrichtian Horseshoe Canyon Formation, Alberta[31] Partial skull with intact frill[31] Type species of Anchiceratops
The holotype in lateral view
Aquilops americanus OMNH 34557[32] Sam Noble Oklahoma Museum of Natural History[32] Middle Albian[32] Cloverly Formation, Montana[32] Mostly complete skull[32]
The holotype skull from multiple views
Archaeoceratops oshimai IVPP V11114[33] Institute of Vertebrate Paleontology and Paleoanthropology Early Aptian Digou Formation, Xinminbao Group, Gansu[33] Skull, vertebrae, pelvis, and partial foot[33] Type species of Archaeoceratops[34]
The holotype skull from multiple views
Archaeoceratops yujinziensis CAGS-IG-VD-003[34] Chinese Academy of Geological Sciences[34] Late Aptian[34] Xiagou Formation, Gansu[34] Vertebrae and partial hindlimb[34]
Arrhinoceratops brachyops ROM 796[35] Royal Ontario Museum[35] Early Maastrichtian Horseshoe Canyon Formation, Alberta[35] Mostly complete skull[35]
The holotype on display in Ontario
Asiaceratops salsopaludalis CCMGE 9/12457[36] Saint Petersburg State University Early Cenomanian[36] Khodzhakul Formation, Uzbekistan[36] Partial maxilla[36] Type species of Asiaceratops, may be a nomen dubium[37]
Asiaceratops sulcidens No catalogue number[38] Uncertain (Aptian to Albian?)[38] Xinminbao Group, Gansu[38] Teeth, centra, and hindlimb elements[38] May be a nomen dubium[37]
Auroraceratops rugosus IG-2004-VD-001[39] Chinese Academy of Geological Sciences[40] Aptian[39] Xinminbao Group, Gansu[39] Nearly complete skull[39] The holotype is known to be a subadult[39]
A reconstruction of the holotype in situ with a hypothetical postcranial skeleton
Avaceratops lammersi ANSP 15800[41] Academy of Natural Sciences of Drexel University[41] Late Campanian Judith River Formation, Montana[41] Partial skull, shoulder, most of the forelimbs, and some vertebrae[41] Maturation level of the holotype is unresolved, may represent a juvenile, but this is uncertain[41]
Cast of the holotype with missing elements filled in for display
Bagaceratops rozhdestvenskyi ZPAL MgD-I/126[42] Polish Academy of Sciences[42] Early Maastrichtian Barun Goyot Formation, Mongolia[43] Mostly complete skull[42] Generally regarded as the senior synonym for Gobiceratops, Lamaceratops, Magnirostris, and Platyceratops[44]
Bainoceratops efremovi PIN 614-33[45] Russian Academy of Sciences[45] Campanian Djadochta Formation, Mongolia[45] Dorsal vertebrae[45]
Beg tse IGM 100/3652[46] Mongolian Academy of Sciences[46] Uncertain (Albian?)[46] Ulaanoosh Formation, Mongolia[46] Skull[46]
Holotype with skull bones labeled
Bisticeratops froeseorum NMMNH P-50000[47] New Mexico Museum of Natural History[47] Late Campanian Kirtland Formation, New Mexico[47] Mostly complete skull[47]
Diagram of the holotype material
Brachyceratops montanensis USNM 7951[48] Smithsonian Institution[48] Campanian Two Medicine Formation, Montana[48] Mostly complete skull[48] May be a nomen dubium, holotype is known to be a juvenile and has been suggested to belong to a juvenile individual of the contemporaneous Styracosaurus or Rubeosaurus[49][50]
Holotype skull mounted on a hypothetical skeleton
Bravoceratops polyphemus TMM 46015-1[51] Texas Memorial Museum[51] Late Maastrichtian Javelina Formation, Texas[51] Numerous skull fragments[51] May or may not be a nomen dubium due to fragmentary nature of the remains[52][53]
Hypothetical restoration of the skeleton with the holotype material in white
Breviceratops kozlowskii ZPAL MgD-I/117[54] Polish Academy of Sciences Early Maastrichtian Barun Goyot Formation, Mongolia[54] Skull and partial postcrania[54] Was originally Protoceratops kozlowskii, may represent a juvenile Bagaceratops or Protoceratops[55]
Digital reconstruction of the holotype in situ
Centrosaurus apertus NMC 971[56] Canadian Museum of Nature Campanian[57] Dinosaur Park Formation, Alberta[57] Mostly complete skull[56] Originally Monoclonius dawsoni, but later referred to its own genus, type species of the subfamily "Centrosaurinae" and the tribe "Centrosaurini"[58]
Illustration of the holotype
Cerasinops hodgskissi MOR 300[59] Museum of the Rockies[59] Campanian Two Medicine Formation, Montana[59] Mostly complete skeleton[59]
The holotype with missing elements filled in
Ceratops montanus USNM 2411[60] Smithsonian Institution Campanian[60] Upper Judith River Formation, Montana[60] Lacrimal horns and other skull elements[60] Nomen dubium, has been tentatively referred to Avaceratops, but is probably undiagnostic, type species of the suborder "Ceratopsia" and the family "Ceratopsidae"[61][62]
Illustration of the holotype material
Chaoyangsaurus youngi IGCAGS V371[3] Chinese Academy of Geological Science Late Tithonian[3] Tuchengzi Formation, Manchuria[3] Partial skull, vertebrae, and forelimb elements[3] Type species of the family "Chaoyangsauridae"
Diagram of the holotype material
Chasmosaurus belli NMC 491[63] Canadian Museum of Nature Middle Campanian Lower Dinosaur Park Formation, Alberta Parietal bone[63] Type species of Chasmosaurus, originally named a species of the dubious genus Monoclonius, type species of the subfamily "Chasmosaurinae"[63]
Chasmosaurus brevirostris ROM 839[64] Royal Ontario Museum Campanian Dinosaur Park Formation, Alberta[65] Nasal and other skull elements without the frill[65] Generally considered synonymous with C. belli[66]
Chasmosaurus canadensis USNM V6061[67] Smithsonian Institution[67] Campanian[67] Judith River Formation, Montana[67] Partial dentary[67] Originally Monoclonius canadensis, was renamed Eoceratops canadensis, now considered Chasmosaurus sp.[68][65]
Chasmosaurus kaiseni AMNH 5401[69] American Museum of Natural History[69] Late Campanian Dinosaur Park Formation, Alberta Mostly complete skull[69] May belong to the dubious genus Mojoceratops or be synonymous with C. russelli[70][65]
The holotype skull on display in New York City
Chasmosaurus russelli NMC 8800[71] Canadian Museum of Nature Late Campanian Upper Dinosaur Park Formation, Alberta[72] Parietal and other frill elements[72] Has been suggested to be synonymous with C. belli[72]
Coahuilaceratops magnacuerna CPC 276[73] Colección Paleontológica de Coahuila[73] Late Campanian Cerro del Pueblo Formation, Mexico[73] Mostly complete limbs, several vertebrae, and skull elements[73]
Digital reconstruction of the holotype material
Colepiocephale lambei GSC 8818[74] Geological Survey of Canada Early Campanian[74] Foremost Formation, Alberta[74] Frontoparietal dome[74] Originally Stegoceras lambei, but was later given its own genus[74][75]
The holotype skull from multiple views
Coronosaurus brinkmani TMP 2002.68.1[76] Royal Tyrrell Museum Campanian Oldman Formation, Alberta[77] Frill and other skull elements[77] Originally Centrosaurus brinkmani, later given its own genus[77]
The holotype on display in Alberta
Craspedodon lonzeensis IRSNB 390[78] Museum of Natural Sciences in Brussels[78] Santonian Glauconie de Lonzée Formation, Belgium[78] Three isolated teeth Most recently considered a ceratopsian, but may be an ornithopod[79]
Holotype teeth
Crittendenceratops krzyzanowskii NMMNH P-34906[80] New Mexico Museum of Natural History[80] Late Campanian[80] Fort Crittenden Formation, Arizona[80] Parietal and squamosal skull elements[80]
Diabloceratops eatoni UMNH VP 16699[81] Natural History Museum of Utah[81] Early Campanian[82] Wahweap Formation, Utah[81] Partial skull and lower jaw[81]
The skull, minus the lower jaw, in storage in Utah
Dracorex hogwartsia TCMI 2004.17.1[83] The Children's Museum of Indianapolis[83] Late Maastrichtian Hell Creek Formation[83] Mostly complete skull and several vertebrae[83] May be a nomen dubium, this genus has been suggested to be the juvenile form of Pachycephalosaurus wyomingensis[84][85]
The holotype skull mounted
Einiosaurus parvicursoris MOR 456-8-9-6-1[86] Museum of the Rockies Late Campanian[86] Upper Two Medicine Formation, Montana[86] Nasal, supraorbital, and parietal elements of the skull[86]
Holotype skull (A1)
Eotriceratops xerinsularis RTMP 2002.57.5[87] Royal Tyrrell Museum Middle Maastrichtian Upper Horseshoe Canyon Formation, Alberta[87] Multiple vertebrae, ribs, and parts of the skull[87] Some researchers have referred this to the genus Triceratops[4]
Ferrisaurus sustutensis RBCM P900[88] Royal British Columbia Museum Late Maastrichtian[88] Tango Creek Formation, British Columbia[88] Front limb, hind limb, and shoulder elements Specimen is nicknamed "Buster"[89]
Diagram of the holotype material
Foraminacephale brevis CMN 1423[90] Canadian Museum of Nature[90] Campanian Dinosaur Park Formation, Alberta[90] Frontoparietal dome[90] Was originally considered to be Stegoceras brevis, but was recently given its own genus[91]
The holotype skull from multiple views
Furcatoceratops elucidans NSM PV 24660[92] National Museum of Nature and Science Campanian Judith River Formation, Montana[92] A mostly complete skeleton with skull fragments and some limb elements missing[92]
The holotype on display in Tokyo
Goyocephale lattimorei GI SPS 100/1201[93] Mongolian Academy of Sciences[93] Early Maastrichtian Nemegt Formation, Mongolia[93] Complete skull, numerous caudal vertebrae, partial hip, and hindlimb elements[93]
Diagram of the holotype material
Graciliceratops mongoliensis ZPAL MgD-I/156[94] Polish Academy of Science Uncertain (Albian to Santonian?)[28] Bayan Shireh Formation, Mongolia[42] Partial skull, mostly complete limbs, numerous vertebrae[42] Was originally named Microceratops mongoliensis[94]
Diagram of the holotype material
Gravitholus albertae TMP 1972.027.0001[95] Royal Tyrrell Museum[96] Late Campanian[96] Dinosaur Park Formation, Alberta[96] Frontoparietal dome[96]
The holotype from above with arrows indicating supposed pathologies
Gremlin slobodorum TMP 2011.053.0027[97] Royal Tyrrell Museum Middle Campanian Oldman Formation, Alberta A partial frontal bone[97]
Gryphoceratops morrisoni ROM 56635[98] Royal Ontario Museum Late Santonian to Early Campanian Milk River Formation, Alberta[98] Partial dentary[98]
Hanssuesia sternbergi NMC 8817[15] Canadian Museum of Nature Middle Campanian[75] Dinosaur Park Formation, Alberta[75] Frontoparietal dome[75] Was erroneously assigned to the genusTroodon before being reassigned to Stegoceras, and finally being given its own genus, though some still consider it synonymous with the latter[15]
Helioceratops brachygnathus JLUM L0204-Y-3[99] Jilin Provincial Museum Albian[100] Quantou Formation, Manchuria[99] Dentary[99] Paratype specimen includes a partial maxilla of the same scale as the holotype, but it could not be proven that it belongs to the same individual as the holotype[99]
Homalocephale calathoceros MPC-D 100/1201[101] Mongolian Natural History Museum[101] Early Maastrichtian Nemegt Formation, Mongolia[101] Partial skull, mostly complete back legs, and numerous vertebrae[101] Has been suggested to be a juvenile specimen of Prenocephale, but this is largely rejected[102][103][27]
The mounted holotype with missing elements
Hongshanosaurus houi IVPP V12704[104] Hong Kong Science Museum Aptian Yixian Formation, Liaoning[105] Several mostly complete skeletons[105] Nomen dubium, the specimens were renamed Psittacosaurus houi, but are now regarded as a synonym of P. lujiatunensis
The holotype skeletons in situ in Hong Kong
Hualianceratops wucaiwanensis IVPP V18641[106] Institute of Vertebrate Paleontology and Paleoanthropology[106] Early Oxfordian[106] Upper Shishugou Formation, Xinjiang[106] Partial postcranial skeleton with skull fragments
Reconstruction with missing skull elements
Ischioceratops zhuchengensis ZCDM V0O016[107] Zhucheng Dinosaur Museum[107] Late Campanian or Early Maastrichtian[108] Xingezhuang Formation, Wangshi Group, Shandong[107] Partial legs, hip, and caudal vertebrae[107]
A photo and digital model of the holotype
Judiceratops tigris YPM VPPU 022404[109] Yale Peabody Museum[109] Middle Campanian Judith River Formation, Montana[109] Horn, frill, and other skull fragments[109]
Parietal fragment of the holotype from multiple views
Koreaceratops hwaseongensis KIGAM VP 200801[110] Korean University of Science and Technology[110] Albian[110] Shiwa Formation, South Korea[110] Mostly complete tail and hind limb elements[110]
Skeletal reconstruction with the holotype elements on top
Kosmoceratops richardsoni UMNH VP 17000[111] Natural History Museum of Utah[111] Middle to Late Campanian[111] Kaiparowits Formation, Utah[111] Mostly complete skull, numerous ribs, vertebrae, and a partial hip[111]
The holotype skull from multiple views
Kulceratops kulensis CCMGE 495/12457[112] Chernyshev Central Geologic Exploration Museum[112] Late Albian[112] Khodzhakul Formation, Uzbekistan[112] Mostly complete maxilla[112]
Leptoceratops gracilis AMNH 5205[113] American Museum of Natural History[113] Maastrichtian[113] Scollard Formation, Saskatchewan[113] Partial skeleton[113] Type species of the family "Leptoceratopsidae"
Forelimb of the holotype specimen
Liaoceratops yanzigouensis IVPP V12738[114] Institute of Vertebrate Paleontology and Paleoanthropology[114] Barremian[115] Yixian Formation, Liaoning[114] Mostly complete skull[114]
Diagram of the holotype material
Lokiceratops rangiformis EMK 0012[116] Museum of Evolution Campanian Judith River Formation, Montana Mostly complete skull, shoulder, hip bones, and several vertebrae[116]
A skeletal reconstruction with the holotype material in orange
Machairocerastops cronusi UMNH VP 20550[117] Natural History Museum of Utah[117] Early Campanian[117] Wahweap Formation[117] Partial skull[117]
Diagram of the holotype material
Magnirostris dodsoni IVPP V12513[118] Institute of Vertebrate Paleontology and Paleoanthropology[118] Middle to Late Campanian[119] Bayan Mandahu Formation, Inner Mongolia[118] Partial skull with dentary[118] Now considered to be a junior synonym of Bagaceratops[120]
The snout of the holotype
Medusaceratops lokii WDC DJR 001[121] Wyoming Dinosaur Center[121] Late Campanian[121] Upper Judith River Formation, Montana[121] Parietal frill[121]
Mounted cast of the holotype with the missing elements filled in
Menefeeceratops sealeyi NMMNH P-25052[122] New Mexico Museum of Natural History[122] Early Campanian[122] Menefee Formation, New Mexico[122] fragmentary skull, dentary, fragmentary vertebrae, ribs, limb elements, and a partial hip
Mercuriceratops gemini ROM 64222[123] Royal Ontario Museum[123] Middle Campanian[123] Judith River Formation, Montana[123] Squamosal bones[123]
Micropachycephalosaurus hongtuyanensis IVPP V5542[124] Institute of Vertebrate Paleontology and Paleoanthropology[124] Late Campanian or Early Maastrichtian[108] Jiangjunding Formation, Shandong[124] Partial skull including dentary with fragmentary vertebrae, chevrons, and limb elements[124]
The illium associated with the holotype
Mojoceratops perifania TMP 1983.25.1[70] American Museum of Natural History[70] Late Campanian Dinosaur Park Formation, Alberta Mostly complete skull[70] May be synonymous with Chasmosaurus russelli or belong to its own species, C. kasenai (see above)[70][65]
Monoclonius crassus AMNH 3998[125] American Museum of Natural History[125] Campanian[125] Judith River Formation, Montana[125] Mostly complete parietal frill[125] Type species of Monoclonius, probably a nomen dubium and generally considered a junior synonym of Centrosaurus apertus[125]
Illustration of the holotype
Monoclonius cutleri AMNH 5427[126] American Museum of Natural History[126] Campanian[126] Oldman Formation, Alberta[126] Partial skeleton[126] Nomen dubium and junior synonym of Centrosaurus apertus[126]
Monoclonius dawsoni NMC 1173[126] Canadian Museum of Nature[126] Campanian[126] Dinosaur Park Formation, Alberta[126] Partial skull and scapula[126] Nomen dubium and junior synonym of Centrosaurus apertus[126]
Monoclonius fissus AMNH 3988[126] American Museum of Natural History[126] Campanian[126] Dinosaur Park Formation, Alberta[126] Skull[126] Nomen dubium and junior synonym of Centrosaurus apertus[126]
Monoclonius flexus AMNH 5239[126] American Museum of Natural History[126] Campanian[126] Dinosaur Park Formation, Alberta[126] Mostly complete skull[126] Nomen dubium and junior synonym of Centrosaurus apertus[126]
The holotype on display in New York City
Monoclonius longirostris NMC 8795[126] Canadian Museum of Nature[126] Late Campanian[126] Dinosaur Park Formation, Alberta[126] Skull[126] Nomen dubium and junior synonym of Centrosaurus apertus[126]
Monoclonius lowei CMN 8790[127] Canadian Museum of Nature[127] Campanian[127] Upper Dinosaur Park Formation, Alberta[127] Skull without dentary[127] Nomen dubium, but has not been referred to another genus or species[125]
The holotype from multiple views
Monoclonius nasicornus AMNH 5351[128] American Museum of Natural History[128] Campanian[128] Dinosaur Park Formation, Alberta[128] Partial skeleton[128] Nomen dubium, has also been referred to the genus Centrosaurus, but is generally considered to be a synonym of Styracosaurus albertensis[128]
Monoclonius recurvicornis AMNH 3999[129] American Museum of Natural History[129] Campanian[129] Dinosaur Park Formation, Alberta[129] Partial skull elements[129] Nomen dubium, but has not been referred to another genus or species[125]
An illustration of the holotype
Monoclonius sphenocerus AMNH 3989[129] American Museum of Natural History[129] Campanian[129] Dinosaur Park Formation, Alberta[129] Nasal horn and other skull fragments[129] Nomen dubium, but has not been referred to another genus or species[125]
The holotype of M. sphenocerus labeled with a 2
Montanoceratops cerorhynchus AMNH 5464[130] American Museum of Natural History[131] Easly Maastrichtian[131] Horseshoe Canyon Formation, Alberta[131] Mostly complete skull, vertebra, and hind foot with partial rib and limb elements[131] Originally considered a new species of Leptoceratops, but later given its own genus[130][131]
Mounted skeleton based on the holotype material
Mosaiceratops azumai ZMNH M8856[132] Zhejiang Museum of Natural History[132] Uncertain (Turonian to Campanian?)[132] Xiaguan Formation, Henan[132] Mostly complete pelvis and legs with partial ribs, skull, and arm elements[132]
The holotype in situ along with a digital reconstruction
Nasutoceratops titusi UMNH VP 16800[133] Natural History Museum of Utah[133] Late Campanian[134] Kaiparowits Formation, Utah[134] Mostly complete skull, shoulders, and forelimbs with fragmentary vertebrae[133] Type species of the tribe "Nasutoceratopsini"
The holotype material from multiple views with skull bones labeled
Navajoceratops sullivani SMP VP-1500[135] State Museum of Pennsylvania[135] Late Campanian[135] Kirtland Formation, New Mexico[135] Parietal bones of the frill[135]
The holotype parietal bones
Nedoceratops hatcheri USNM 2412[136] Smithsonian Institution[137] Late Maastrichtian[137] Lance Formation, Wyoming[136] Complete skull without dentary[136] Was originally named Diceratops before it was discovered that this name was taken by a genus of wasp and was later renamed Diceratus before eventually being named Nedoceratops in 2008, might belong to Triceratops hatcheri or may simply be a specimen of Triceratops with unusual morphology[94][138]
The holotype on display in Washington D.C.
Notoceratops bonarellii Not catalogued N/A, holotype has been lost[139] Maastrichtian[140] Lago Colhué Huapí Formation, Patagonia[6] Partial dentary[141] Nomen dubium, no other ceratopsian material is known from South America and the fragmentary nature was not studied enough to properly diagnose according to modern standards
An illustration of the holotype
Ojoceratops fowleri SMP VP-1865[142] State Museum of Pennsylvania[142] Maastrichtian[143] Ojo Alamo Formation, New Mexico[142] Squamosal skull bone[142] Has been suggested to be a synonym of Triceratops or possibly Eotriceratops[144][145]
A reconstruction of the holotype with other referred material
Ornatotholus browni AMNH 5450[146] American Museum of Natural History[146] Campanian[146] Dinosaur Park Formation, Alberta[146] Frontoparietal dome[146] Nomen dubium, multiple studies have indicated that the holotype is probably a juvenile of the species Stegoceras validum[147][75]
The holotype shown from multiple views
Pachycephalosaurus grangeri AMNH 1696[15] American Museum of Natural History[15] Maastrichtian[15] Lance Formation, Wyoming[15] Skull without dentary[15] Now considered a junior synonym of Pachycephalosaurus wyomingensis[148]
The skull on display in New York City
Pachycephalosaurus reinheimeri DMNH 469[15] Denver Museum of Nature and Science[15] Maastrichtian[15] Lance Formation, Wyoming[15] Frontoparietal dome[15] Now considered a junior synonym of Pachycephalosaurus wyomingensis[148]
The holotype shown from multiple views
Pachycephalosaurus wyomingensis USNM 12031[15] Smithsonian Institution[15] Maastrichtian[15] Lance Formation, Wyoming[15] Skull[15] Type species of Pachycephalosaurus, originally classified under the genus Troodon because of the similarity of its teeth to troodontid teeth, type species of the suborder "Pachycephalosauria", the family "Pachycephalosauridae", the subfamily "Pachycephalosaurinae", and the tribe "Pachycephalosaurini"[15]
Pachyrhinosaurus canadensis NMC 8867[149] Canadian Museum of Nature[149] Early Maastrichtian[149] Horseshoe Canyon Formation, Alberta[149] Partial skull[149] Type species of Pachyrhinosaurus and of the tribe "Pachyrhinosaurini"
Pachyrhinosaurus lakustai TMP 1986.55.258[150] Royal Tyrrell Museum[150] Campanian[150] Wapiti Formation, Alberta[150] Skull[150]
The holotype skull on display with missing elements reconstructed with plaster
Pachyrhinosaurus perotorum DMNH21200[151] Denver Museum of Natural History[151] Early or Middle Maastrichtian[151] Prince Creek Formation, Alaska[151] Partial skull[151]
The holotype shown from multiple views
Pentaceratops aquilonius CMN 9813[152] Canadian Museum of Nature[152] Campanian[152] Dinosaur Park Formation, Alberta[152] Fragmentary skull elements[152] May be synonymous with Vagaceratops, Chasmosaurus, or Spiclypeus, material has been argued to be undiagnostic[153]
The holotype material shown with multiple interpretations of its nature
Pentaceratops fenestratus PMU.R200[154] Uppsala University[154] Middle or Late Campanian[154] Kirtland Formation, New Mexico[154] Partial skull and relatively complete postcrania[154] Now considered a nomen dubium because the autapomorphy used to diagnose the new species was considered to be an injury or pathology[20]
Illustration of the holotype skull in lateral view
Pentaceratops sternbergii AMNH 6325[155] American Museum of Natural History[155] Late Campanian[155] Fruitland Formation, New Mexico[155] Mostly complete skull[155] Type species of Pentaceratops
A photo of the holotype in lateral view
Platytholus clemensi MOR 2915[156] Museum of the Rockies[156] Maastrichtian[156] Hell Creek Formation, Montana[156] Partial skull[156]
Polyonax mortuarius AMNH FR 3950[157] American Museum of Natural History[157] Uncertain Colorado, locality not listed[157] Horn fragments and vertebrae[157] Nomen dubium, material too fragmentary to refer to a particular genus or species[158]
Prenocephale prenes ZPAL MgD-I/104[101] Polish Academy of Sciences[101] Maastrichtian[101] Nemegt Formation, Mongolia[101] Skull without a dentary[101]
Holotype skull in lateral view
Prenoceratops pieganensis TCM 2003.1.1[159] The Children's Museum of Indianapolis[159] Campanian[159] Two Medicine Formation[159] Articulated jaw bones[159] Specimen is nicknamed "Frannie"[160]
A mounted cast composite modeled after the holotype and other associated specimens
Protoceratops andrewsi AMNH 6251[161] American Museum of Natural History[161] Campanian[161] Djadochta Formation, Mongolia[161] Rostrum[161] Type species of Protoceratops and of the family "Protoceratopsidae"
The holotype material with a ruler for scale
Protoceratops hellenikorhinus IMM 95BM1/1[162] Inner Mongolia Museum[162] Late Campanian[162] Bayan Mandahu Formation, Inner Mongolia[162] Complete skull[162]
The holotype on display in Hohhot
Psittacosaurus amitabha IGM 100/1132[163] Mongolian Academy of Sciences[163] Barremian[163] Andakhuduk Formation, Mongolia[163] Mostly complete skull[163]
Psittacosaurus gobiensis LH PV2[164] Long Hao Institute of Geology and Paleontology[164] Late Barremian or Albian[164] Bayin-Gobi Formation, Inner Mongolia[164] Mostly complete skeleton including gastroliths[164]
Psittacosaurus guyangensis CAGS-IG V35[104] Chinese Academy of Geological Sciences[104] Barremian to Aptian Guyang Formation, Inner Mongolia[104] Anterior of the skull[104] Nomen dubium and junior synonym of P. mongoliensis[104]
Psittacosaurus lujiatunensis ZMNH M8137[165] Zhejiang Museum of Natural History Aptian Yixian Formation, Liaoning[165] Skull including dentary[165]
Cast of the holotype in Brussels
Psittacosaurus major LH PV1[166] Long Hao Institute of Geology and Paleontology Late Barremian or Early Aptian[104] Yixian Formation[104] Mostly complete skeleton with skull[104]
The holotype, not including the post-cranial elements, shown from multiple views
Psittacosaurus mazongshanensis IVPP V12165[104] Institute of Vertebrate Paleontology and Paleoanthropology Barremian Xinminbao Group, Gansu Partial lower jaw and maxilla[104] Nomen dubium, too fragmentary to refer to any specific species[104]
Psittacosaurus meileyingensis IVPP V7705[104] Institute of Vertebrate Paleontology and Paleoanthropology Albian Jiufotang Formation, Liaoning[104] Mostly complete skull without jugals[104]
Psittacosaurus mongoliensis AMNH 6254[104] American Museum of Natural History Uncertain (Aptian or Albian?)[104] Khukhtek Formation, Mongolia[104] Nearly complete skull and fully articulated skeleton[104] Type species of Psittacosaurus and of the monogeneric family "Psittacosauridae"[104]
The holotype in situ on display in New York City
Psittacosaurus neimongoliensis IVPP 12–0888-2[104] Institute of Vertebrate Paleontology and Paleoanthropology Aptian to Albian[104] Ejinhoro Formation, Inner Mongolia[104] Articulated skeleton with skull[104]
Psittacosaurus ordosensis IVPP 07–08888-1[104] Institute of Vertebrate Paleontology and Paleoanthropology Aptian to Albian[104] Ejinhoro Formation, Inner Mongolia[104] Half of a skull and a partial hind limb Possibly a nomen dubium, may be a junior synonym of P. sinensis, but further material is awaiting description[104]
Psittacosaurus osborni IVPP V41039[167] Institute of Vertebrate Paleontology and Paleoanthropology Uncertain (Aptian or Albian?)[104] Not listed, Guyang County[167] Partial skull[167] Nomen dubium and junior synonym of P. mongoliensis
Psittacosaurus sattayaraki TF 2449a[168] Phu Wiang Dinosaur Museum[168] Albian Khot Kruat Formation, Thailand Partial dentary[168] Nomen dubium, may not be diagnostic enough to refer to a particular genus, but some authors regard it as valid[169][104]
Psittacosaurus sibiricus PM TGU 16/4-20[169] Tomsk State University[104] Uncertain (younger than Albian)[170] Ilek Formation, Kemerovo[169] Skull with articulated skeleton[104]
The holotype on a temporary display in Moscow
Psittacosaurus sinensis IVPP V738[104] Institute of Vertebrate Paleontology and Paleoanthropology Barremian to Albian[171] Qingshan Group, Shandong Mostly complete skull and articulated skeleton[104]
Psittacosaurus tingi IVPP V31040[167] Institute of Vertebrate Paleontology and Paleoanthropology Uncertain (Aptian or Albian?)[104] Not listed, Guyang County[167] Fragmentary skull elements[104] Nomen dubium, the holotype is known to be a juvenile and has been considered a junior synonym of P. osborni and P. mongoliensis[104]
Psittacosaurus xinjiangensis IVPP V7698[172] Institute of Vertebrate Paleontology and Paleoanthropology Aptian[104] Lianmuqin Formation, Xinjiang[172] Partial skull and articulated skeleton lacking some limb and tail elements[104]
Psittacosaurus youngi BNHM BPV149[172] Museum of Vertebrate Zoology[172] Barremian to Albian[171] Doushan Formation, Qingshan Group, Shandong[104] Complete skull with partial hip, vertebrae, and limb elements Nomen dubium, generally considered a junior synonym of P. sinensis
The holotype on display in situ in Zhengzhou
Regaliceratops peterhewsi TMP 2005.055.0001[173] Royal Tyrrell Museum[173] Early Maastrichtian[173] St. Mary River Formation, Alberta[173] Mostly complete skull[173] Specimen is nicknamed "Hellboy"[174]
The holotype on display with missing elements filled in
Sasayamagnomus saegusai MNHAH D1-060516[10] Museum of Nature and Human Activities Early Albian[10] Ohyamashimo Formation, Japan Partial skull and lower jaw[10] Several specimens were referred in the description, but these were not included in the holotype[10]
Serendipaceratops arthurcclarkei NMV P186385[7] Melbourne Museum[7] Early Aptian[7] Wonthaggi Formation, Victoria[7] Ulna[7] Considered a nomen dubium, remains are so fragmentary that some believe it is not possible to diagnose them as a ceratopsian, some have referred the holotype to ankylosauria[175][176]
Sierraceratops turneri NMMNH P-76870[177] New Mexico Museum of Natural History[177] Late Campanian or Early Maastrichtian[177] Hall Lake Formation, New Mexico[177] Mostly complete skull and forelimb with a few vertebrae[177]
A vertebra from the holotype
Sinocephale bexelli Not catalogued and now lost[178] Institute of Vertebrate Paleontology and Paleoanthropology was the holotype's last recorded location[178] Turonian, presumably[178] Uncertain, probably the Ulansuhai Formation, Inner Mongolia[178] Partial skull[178] Originally Troodon bexelli before being moved to the genus Stegoceras, specimens AMNH 2073 and PMU 23186 are plaster casts of the original holotype that were made and were used to diagnose it as a new genus[178]
Sinoceratops zhuchengensis ZCDM V0010[179] Zhucheng Dinosaur Museum[179] Late Campanian or Early Maastrichtian[108] Xingezhuang Formation, Shandong[179] Partial skull with intact braincase[179]
Digital reconstruction of the holotype skull viewed from the side
Sphaerotholus buchholtzae TMP 87.113.3[180] Royal Tyrrell Museum[180] Maastrichtian[180] Hell Creek Formation, Montana[180] Incomplete skull[180] Once considered a junior synonym of S. edmontonensis, now generally considered its own species[75][181]
Sphaerotholus edmontonensis GSC 8830[15] Canadian Museum of Nature[182] Frotoparietal dome Originally assigned to Troodon before being renamed as a species of Prenocephale and later Stegoceras before being referred to Sphaerotholus[15][74][183]
Sphaerotholus goodwini NMMNH P-27403[180] New Mexico Museum of Natural History[180] Campanian[180] Kirtland Formation, New Mexico[180] Incomplete skull[180] Type species of Sphaerotholus
Sphaerotholus lyonsi TMP 2002.12.63[184] Royal Tyrell Museum Campanian Dinosaur Park Formation, Alberta One of the squamosals[184]
Sphaerotholus triregnum ROM 53583[184] Royal Ontario Museum Maastrichtian Hell Creek Formation, Montana Partial frontoparietal dome[184]
Spiclypeus shipporum CMN 57081[153] Canadian Museum of Nature[153] Late Campanian[153] Judith River Formation, Montana[153] Partial skull with a few vertebrae, ribs, and limb bones[153]
Holotype with frill elements labeled
Sphaerotholus triregnum ROM 53583[184] Royal Ontario Museum Late Maastrichtian Hell Creek Formation, Montana One of the squamosals[184]
Spinops sternbergorum NHMUK R16307[185] Natural History Museum, London[185] Campanian[185] Oldman Formation or Dinosaur Park Formation, Alberta[185] Partial parietal[185]
The bones of the holotype labeled and shown in multiple views
Stegoceras novomexicanum NMMNH P-33983[186] New Mexico Museum of Natural History Campanian[186] Fruitland Formation, New Mexico[186] Frontoparietal dome[186] May be a nomen dubium, holotype may be a juvenile and has been referred variously to Stegoceras sp., S. validum, and Sphaerotholus goodwini[187][188]
Stegoceras validum NMC 515[75] Canadian Museum of Nature[75] Campanian[75] Dinosaur Park Formation, Alberta[75] Frontoparietal dome[75] Type species of Stegoceras, there were initially two "syntypes", but one was selected as the "lectotype" or "new holotype"[75]
The holotype shown from multiple views
Stellasaurus ancellae MOR 492[189] Museum of the Rockies[189] Late Campanian Two Medicine Formation, Montana[189] Parietal frill with epiossifications, nasal horn, and other skull elements[189]
Parietal portion of the holotype
Stenopelix valdensis GZG 741/2[190] University of Göttingen[190] Late Berriasian Obernkirchen Sandstein Formation, Germany[190] Mostly complete ribs, vertebrae, hips, tail, and limbs with no skull[191]
Plaster casts of the holotype alongside digital reconstructions
Stenotholus kohleri MPM 7111[192] University of California Museum of Paleontology[192] Maastrichtian Hell Creek Formation, Montana[192] Partial skull with an intact braincase Nomen dubium and probably a junior synonym of Pachycephalosaurus wyomingensis or Stygimoloch spinifer[22]
Stygimoloch spinifer UCMP 110433[148] University of California Museum of Paleontology[148] Maastrichtian Hell Creek Formation, Montana[148] Skull[148] Validity disputed, has been considered Pachycephalosaurus spinifer or a juvenile form of P. wyomingensis[193]
Skull elements of the holotype laid out individually
Styracosaurus albertensis NMC 344[194] Canadian Museum of Nature[194] Campanian Dinosaur Park Formation, Alberta[194] Complete skull[194] Type species of Styracosaurus[194]
The holotype on display mounted on a restored skeleton
Styracosaurus ovatus USNM 11869[49] Smithsonian Institution[49] Campanian[49] Two Medicine Formation, Alberta[49] Partial frill with epiparietals[49] Originally assigned to Styracosaurus, this specimen was later given its own genus, Rubeosaurus, now broadly considered to either be S. ovatus or a junior synonym of S. albertensis[49][195][50]
The holotype frill with elements labeled
Styracosaurus parksi AMNH 5372[196] American Museum of Natural History Campanian Dinosaur Park Formation, Alberta[196] Mostly complete skeleton[196] Now considered a junior synonym of S. albertensis[48]
The holotype in a display at the American Museum of Natural History
Tatankaceratops sacrinsonorum BHI 6226[197] Black Hills Institute[197] Late Maastrichtian Hell Creek Formation, South Dakota[197] Partial skull[197] Nomen dubium, generally considered to be a juvenile or aberrant specimen of Triceratops[198]
Diagram of the holotype material
Terminocavus sealeyi NMMNH P-27468[135] New Mexico Museum of Natural History[135] Late Campanian Kirtland Formation, New Mexico[135] Parietal with other skull elements and vertebral fragments[135]
The holotype shown from the front and behind
Texacephale langstoni LSUMNS 20010[199] Louisiana State University Museum of Natural Science[199] Late Campanian Aguja Formation, Texas[199] Frontoparietal bone[199]
Skull dome of the holotype shown in multiple views
Titanoceratops ouranos OMNH 10165[200] Sam Noble Oklahoma Museum of Natural History[200] Late Campanian[200] Upper Fruitland Formation or Lower Kirtland Formation, New Mexico[200] Partial skull, numerous limb bones, fragmentary ribs and vertebrae
Diagram of the holotype material
Torosaurus gladius YPM 1831[201] Yale Peabody Museum[201] Maastrichtian[201] Lance Formation, Wyoming[201] Skull[201] Nomen dubium, found to be a junior synonym of T. latus[202]
Holotype (top) compared to a putative Torosaurus subadult
Torosaurus latus YPM 1830 Yale Peabody Museum[201] Maastrichtian Lance Formation, Wyoming[201] Mostly complete skull[201] Type species of Torosaurus, has been argued to be a junior synonym of Triceratops, but this has not been widely accepted[13][14][203]
Illustration of the holotype by Othniel Charles Marsh
Torosaurus utahensis USNM 15583[204] Smithsonian Institution[204] Maastrichtian North Horn Formation, Utah[204] Parietal and quadrate fragments[204]
Triceratops albertensis NMC 8862[205] Canadian Museum of Nature Maastrichtian Scollard Formation, Alberta[205] Partial skull[205] Nomen dubium, junior synonym of T. horridus[206]
Triceratops alticornis USNM V4739[207] Smithsonian Institution[207] Maastrichtian Denver Formation, Colorado[207] Horns and brow ridge Nomen dubium, originally misidentified as a species of Bison before being referred to Triceratops, now considered Triceratops sp.[207]
An illustration of the holotype
Triceratops brevicornus YPM 1834[206] Yale Peabody Museum Maastrichtian Lance Formation, Wyoming Partial skull[206] Junior synonym of T. horridus[206]
Triceratops calicornis USNM 4928[208] Smithsonian Institution[208] Maastrichtian Lance Formation, Wyoming[208] Skull and partial skeleton[208] Junior synonym of T. horridus[206]
An illustration of the holotype
Triceratops elatus USNM V1201[209] Smithsonian Institution[209] Maastrichtian Lance Formation, Wyoming[209] Partial skull[209] Junior synonym of T. horridus[206]
An illustration of the holotype
Triceratops eurycephalus MCZ 1102[210] Museum of Comparative Zoology[210] Maastrichtian Lance Formation, Wyoming[206] Partial skeleton[210] Junior synonym of T. horridus[206]
Triceratops flabellatus YPM 1821[211] Yale Peabody Museum Maastrichtian Lance Formation, Wyoming[211] Skull[211] Junior synonym of T. horridus[206]
An illustration of the holotype skull from below, showing the palate
Triceratops galeus USNM V2410[212] Smithsonian Institution[212] Maastrichtian[212] Denver Formation, Colorado[212] Fragmentary parietal[212] Junior synonym of T. horridus[212]
Triceratops horridus YPM 1820[213] Yale Peabody Museum Maastrichtian Lance Formation, Wyoming[213] Mostly complete skull[213] Type species of Triceratops, official dinosaur of the state of Wyoming,[214] originally named Ceratops horridus before being given its own genus, type species of the tribe "Triceratopsini"[213]
An illustration of the holotype
Triceratops ingens YPM 1828[215] Yale Peabody Museum[215] Maastrichtian[215] Never formally published and described[215] Partial skull[215] Nomen dubium, it is not certain if this is T. horridus, T. prorsus, of T. sp.[215]
Triceratops maximus AMNH 5040[215] American Museum of Natural History[215] Maastrichtian Hell Creek Formation, Montana[216] Eight vertebrae and a few rib fragments[216] Nomen dubium, material is not diagnostic enough to assign it to any particular genus[215]
Triceratops obtusus USNM 4720[217] Smithsonian Institution[217] Maastrichtian Lance Formation, Wyoming[217] Partial skull[217] Nicknamed "Hatcher", junior synonym of T. horridus[206]
Hatcher on display in Washington, D.C.
Triceratops prorsus YPM 1822[14] Yale Peabody Museum Maastrichtian Laramie Formation, Wyoming[14] Complete skull[14] The only other species of Triceratops, besides T. horridus that is universally considered to be valid[206][215]
The holotype of T. prorsus (top) compared to a specimen nicknamed "Yoshi's Trike"
Triceratops serratus YPM 1823[218] Yale Peabody Museum Maastrichtian Laramie Formation, Colorado[219] Mostly complete skull[219] Junior synonym of T. horridus[206]
Illustration of the holotype
Triceratops sulcatus USNM V4286[220] Smithsonian Institution[220] Maastrichtian Lance Formation, Wyoming[220] Jaw fragment with partial horn core[220] Junior synonym of T. horridus[220]
Illustration of the jaw portion of the holotype from multiple views
Turanoceratops tardabilis CCMGE 251/12457[221] Chernyshev Central Museum of Geological Exploration Turonian[221] Bissekty Formation, Uzbekistan[221] Partial maxilla[221]
Tylocephale gilmorei ZPAL MgD-I/105[222] Polish Academy of Sciences[222] Campanian Barun Goyot Formation, Mongolia[222] Mostly complete skull[222]
Diagram of the holotype material
Tylosteus ornatus ANSP 8568[223] Academy of Natural Sciences of Drexel University[223] Maastrichtian Lance Formation, Montana[223] Partial skull[223] Nomen dubium, was named before Pachycephalosaurus, and probably refers to the same animal, but the latter name was given priority[224]
Udanoceratops tchizhovi PIN 3907/11[225] Russian Academy of Sciences[225] Campanian Djadochta Formation, Mongolia[225] Mostly complete skull and a few vertebrae[225]
Diagram of the holotype material
Ugrosaurus olsoni UCMP 128561[226] Museum of Vertebrate Zoology[226] Late Maastrichtian Hell Creek Formation, Montana[226] Fragments of the premaxilla, dentary, and parietal bones[226] Nomen dubium, not diagnostic from Triceratops, which existed in the same time and place as U. olsoni[226]
Unescoceratops kopelhusae TMP 95.12.6[98] Royal Tyrrell Museum[98] Campanian[98] Dinosaur Park Formation, Alberta[98] Partial dentary[98]
Utahceratops gettyi UMNH VP 16784[111] Utah Museum of Natural History[111] Campanian Kaiparowits Formation, Utah[111] Disarticulated, mostly complete skull[111]
Labeled holotype elements with a reconstruction of a complete skull below
Vagaceratops irvinensis CMN 41357[65] Canadian Museum of Nature Late Campanian[227] Dinosaur Park Formation, Alberta[227] Frill and mostly complete postcrania[227] Sometimes considered to belong to the genus Chasmosaurus as the species C. irvinensis[111]
The holotype on display as it was found
Wannanosaurus yansiensis IVPP V4447[228] Institute of Vertebrate Paleontology and Paleoanthropology[229] Early or Middle Maastrichtian[229] Xiaoyan Formation, Anhui[229] Partial skull roof and lower jaw, femur, tibia, part of a rib, and other postcranial fragments[229]
Skull fragments of the holotype, with the postcranial elements omitted
Wendiceratops pinhornensis TMP2011.051.0009[230] Royal Tyrrell Museum[230] Campanian[230] Oldman Formation, Alberta[230] Parietal bone[230]
The holotype shown from multiple views with the epiparietals labeled
Xenoceratops foremostensis CMN 53282[231] Canadian Museum of Nature[231] Early Campanian[231] Foremost Formation, Alberta[231] Parietal bone[231]
Xuanhuaceratops niei IVPP 12722[232] Institute of Vertebrate Paleontology and Paleoanthropology[232] Tithonian[232] Houcheng Formation, Hebei[232] Mostly complete skull, numerous vertebrae, partial hip, shoulder, and limb elements[232]
Yamaceratops dorngobiensis IGM 100/1315[44] Mongolian Academy of Sciences[44] Santonian[44] Javkhlant Formation, Mongolia[44] Mostly complete skull[44]
Holotype shown from multiple views
Yinlong downsi IVPP V14530[233] Institute of Vertebrate Paleontology and Paleoanthropology[233] Oxfordian[233] Shishugou Formation, Xinjiang[233] Complete skeleton with skull[233]
Zhuchengceratops inexpectus ZCDM V0015[234] Zhucheng Dinosaur Museum[234] Early Maastrichtian Xingezhuang Formation, Shandong[234] Partial skull with a mostly complete skeleton[234]
The skull and jaw elements of the holotype
Zuniceratops christopheri MSM P2101[235] Arizona Museum of Natural History[235] Turonian[235] Moreno Hill Formation, New Mexico[235] Partial skull and limb elements[235]

See also

[edit]

References

[edit]
  1. ^ a b c d e E. D. Cope. 1872. On the existence of Dinosauria in the transition beds of Wyoming. Proceedings of the American Philosophical Society (separate) 1-2
  2. ^ Madzia, D.; Arbour, V.M.; Boyd, C.A.; Farke, A.A.; Cruzado-Caballero, C.; Evans, D.C. (2021). "The phylogenetic nomenclature of ornithischian dinosaurs". PeerJ. 9: e12362. doi:10.7717/peerj.12362. PMC 8667728. PMID 34966571.
  3. ^ a b c d e Xijin, Zhao; Zhengwu, Cheng & Xing, Xu (1999) [1999-12-13]. "The earliest ceratopsian from the Tuchengzi Formation of Liaoning, China". Journal of Vertebrate Paleontology. 19 (4): 681–691. Bibcode:1999JVPal..19..681X. doi:10.1080/02724634.1999.10011181.
  4. ^ a b Paul, G. S. (2010). The Princeton Field Guide to Dinosaurs. Princeton University Press. p. 265. ISBN 978-0-691-13720-9.
  5. ^ a b c d Ősi, Attila; Butler, R.J.; Weishampel, David B. (2010-05-27). "A Late Cretaceous ceratopsian dinosaur from Europe with Asian affinities". Nature. 465 (7297): 466–468. Bibcode:2010Natur.465..466O. doi:10.1038/nature09019. PMID 20505726. S2CID 205220451.
  6. ^ a b Coria R, Cambiaso A (2007). "Ornithischia". In Gasparini Z, Salgado L, Coria R (eds.). Patagonian Mesozoic reptiles. Bloomington: Indiana University Press. pp. 167–187. ISBN 9780253348579. OCLC 758738548.
  7. ^ a b c d e f T. Rich and P. Vickers-Rich. 2003. Protoceratopsian? ulnae from Australia. Records of the Queen Victoria Museum Launceston 113:1-12
  8. ^ Paul, G. S. (2010). The Princeton Field Guide to Dinosaurs. Princeton University Press. ISBN 978-0-691-13720-9.
  9. ^ Hotlz, Dr. Thomas R. (2007). Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages. Rey, Luis V. Random House Books for Young Readers. ISBN 978-0375824197.
  10. ^ a b c d e Tanaka, Tomonori; Chiba, Kentaro; Ikeda, Tadahiro; Ryan, Michael J. (2024). "A new neoceratopsian (Ornithischia, Ceratopsia) from the Lower Cretaceous Ohyamashimo Formation (Albian), southwestern Japan". Papers in Palaeontology. 10 (5). doi:10.1002/spp2.1587.
  11. ^ a b "ICZN Code Art. 5". Archived from the original on 2016-12-20. Retrieved 2016-12-09.
  12. ^ Tschopp, E.; Mateus, O. V.; Benson, R. B. J. (2015). "A specimen-level phylogenetic analysis and taxonomic revision of Diplodocidae (Dinosauria, Sauropoda)". PeerJ. 3: e857. doi:10.7717/peerj.857. PMC 4393826. PMID 25870766.Open access icon
  13. ^ a b Scannella, John B.; Horner, John R. (2010). "Torosaurus Marsh, 1891, is Triceratops Marsh, 1889 (Ceratopsidae: Chasmosaurinae): Synonymy through ontogeny". Journal of Vertebrate Paleontology. 30 (4): 1157–1168. doi:10.1080/02724634.2010.483632.
  14. ^ a b c d e Longrich, N. R. & Field, D. J. (2012). "Torosaurus is not Triceratops: Ontogeny in chasmosaurine ceratopsids as a case study in dinosaur taxonomy". PLoS ONE. 7 (2): e32623. Bibcode:2012PLoSO...732623L. doi:10.1371/journal.pone.0032623. PMC 3290593. PMID 22393425.
  15. ^ a b c d e f g h i j k l m n o p q r s t u Brown, Barnum; Schlaikjer, Erich M. (1943). "A study of the troödont dinosaurs with the description of a new genus and four new species". Bulletin of the American Museum of Natural History. 82 (5): 115–150. hdl:2246/387.
  16. ^ a b c Sampson, S.D. (1995). "Two new horned dinosaurs from the Upper Cretaceous Two Medicine Formation of Montana; with a phylogenetic analysis of the Centrosaurinae (Ornithischia: Ceratopsidae)". Journal of Vertebrate Paleontology. 15 (4): 743–760. Bibcode:1995JVPal..15..743S. doi:10.1080/02724634.1995.10011259.
  17. ^ a b c d Evans, David C.; Schott, Ryan K.; Larson, Derek W.; Brown, Caleb M.; Ryan, Michael J. (2013-05-07). "The oldest North American pachycephalosaurid and the hidden diversity of small-bodied ornithischian dinosaurs". Nature Communications. 4: 1828. Bibcode:2013NatCo...4.1828E. doi:10.1038/ncomms2749. ISSN 2041-1723. PMID 23652016.
  18. ^ Ostrom, J. H.; Wellnhofer, P. (1985). "The Munich specimen of Triceratops with a revision of the genus". Zitteliana. 14: 111–158.
  19. ^ a b c d Lehman, T. M. (1989). "Chasmosaurus mariscalensis, sp. Nov., a new ceratopsian dinosaur from Texas". Journal of Vertebrate Paleontology. 9 (2): 137–162. Bibcode:1989JVPal...9..137L. doi:10.1080/02724634.1989.10011749.
  20. ^ a b Lucas, S.G.; Sullivan, R.M.; Hunt, A.P. (2006). "Re-evaluation of Pentaceratops and Chasmosaurus (Ornithischia: Ceratopsidae) in the Upper Cretaceous of the Western Interior" (PDF). New Mexico Museum of Natural History and Science Bulletin. 35: 367–370.
  21. ^ a b c Lehman, T.M.; Wick, S.L.; Barnes, K.R. (2016). "New specimens of horned dinosaurs from the Aguja Formation of West Texas, and a revision of Agujaceratops". Journal of Systematic Palaeontology. 15 (8): 641–674. doi:10.1080/14772019.2016.1210683. S2CID 88907183.
  22. ^ a b c d Sullivan, RM (2006). "A taxonomic review of the Pachycephalosauridae (Dinosauria: Ornithischia)". New Mexico Museum of Natural History and Science Bulletin (35): 347–365.
  23. ^ a b c d Ohashi, T.; Barrett, P. M. (2009). "A new ornithischian dinosaur from the Lower Cretaceous Kuwajima Formation of Japan". Journal of Vertebrate Paleontology. 29 (3): 748–757. Bibcode:2009JVPal..29..748O. doi:10.1671/039.029.0306. S2CID 128546047.
  24. ^ Amiot, Romain; Kusuhashi, Nao; Saegusa, Haruo; Shibata, Masateru; Ikegami, Naoki; Shimojima, Shizuo; Sonoda, Teppei; Fourel, François; Ikeda, Tadahiro; Lécuyer, Christophe; Philippe, Marc; Wang, Xu (2021-01-01). "Paleoclimate and ecology of Cretaceous continental ecosystems of Japan inferred from the stable oxygen and carbon isotope compositions of vertebrate bioapatite". Journal of Asian Earth Sciences. 205: 104602. Bibcode:2021JAESc.20504602A. doi:10.1016/j.jseaes.2020.104602. ISSN 1367-9120.
  25. ^ Han, Feng-Lu; Barrett, Paul M.; Butler, Richard J.; Xu, Xing (2012). "Postcranial anatomy of Jeholosaurus shangyuanensis (Dinosauria, Ornithischia) from the Lower Cretaceous Yixian Formation of China". Journal of Vertebrate Paleontology. 32 (6): 1370–1395. Bibcode:2012JVPal..32.1370H. doi:10.1080/02724634.2012.694385. S2CID 86754247.
  26. ^ a b c Ryan, Michael J. (2007). "A New Basal Centrosaurine Ceratopsid from the Oldman Formation, Southeastern Alberta". Journal of Paleontology. 81 (2): 376–396. doi:10.1666/0022-3360(2007)81[376:ANBCCF]2.0.CO;2. ISSN 0022-3360. S2CID 130607301.
  27. ^ a b c d Watabe, Mahito; Tsogtbaatar, Khishigjaw & Sullivan, Robert M. (2011). "A new pachycephalosaurid from the Baynshire Formation (Cenomanian-late Santonian), Gobi Desert, Mongolia". New Mexico Museum of Natural History and Science Bulletin. 53: 489–497.
  28. ^ a b Nessov, L. A. (1995). Dinosaurs of northern Eurasia: new data about assemblages, ecology and paleobiogeography (PDF) (in Russian). Saint Petersburg: Saint Petersburg University. p. 156.
  29. ^ a b c d Sternberg, C.M. (1929). "A new species of horned dinosaur from the Upper Cretaceous of Alberta". National Museum of Canada Bulletin. 54: 34–37.
  30. ^ Lehman, T.M. 1990. "The ceratopsian subfamily Chasmosaurinae: sexual dimorphism and systematics". In: Carpenter, K. & Currie, P.J. (Eds.). Dinosaur Systematics: Approaches and Perspectives. Cambridge: Cambridge University Press. Pp. 211–219
  31. ^ a b c Brown, B (1914). "Anchiceratops, a new genus of horned dinosaurs from the Edmonton Cretaceous of Alberta. With a discussion of the origin of the ceratopsian crest and the brain casts of Anchiceratops and Trachodon"". Bulletin of the American Museum of Natural History. 33: 539–548.
  32. ^ a b c d e Farke, Andrew A.; Maxwell, W. Desmond; Cifelli, Richard L.; Wedel, Mathew J. (2014-12-10). "A Ceratopsian Dinosaur from the Lower Cretaceous of Western North America, and the Biogeography of Neoceratopsia". PLoS ONE. 9 (12): e112055. Bibcode:2014PLoSO...9k2055F. doi:10.1371/journal.pone.0112055. PMC 4262212. PMID 25494182.
  33. ^ a b c You, H.; Dodson, P. (2003). "Redescription of neoceratopsian dinosaur Archaeoceratops and early evolution of Neoceratopsia" (PDF). Acta Palaeontologica Polonica. 48 (2): 261–272.
  34. ^ a b c d e f You, Hai-Lu; Tanque, Kyo; Dodson, Peter (2010). "A new species of Archaeoceratops (Dinosauria: Neoceratopsia) from the Early Cretaceous of the Mazongshan area, northwestern China". In Ryan, Michael J.; Chinnery-Allgeier, Brenda J.; Eberth, David A. (eds.). New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Bloomington and Indianapolis: Indiana University Press. pp. 59–67. ISBN 978-0-253-35358-0.
  35. ^ a b c d Parks, W.A. (1925). "Arrhinoceratops brachyops, a new genus and species of Ceratopsia from the Edmonton Formation of Alberta". University of Toronto Studies, Geology Series 19:1-15
  36. ^ a b c d L.A. Nessov, (1995), Dinozavri severnoi Yevrazii: Novye dannye o sostave kompleksov, ekologii i paleobiogeografii, Institute for Scientific Research on the Earth's Crust, St. Petersburg State University, St. Petersburg 156 pp
  37. ^ a b Makovicky, Peter J.; Norell, Mark A. (2006). "Yamaceratops dorngobiensis, a new primitive ceratopsian (Dinosauria: Ornithischia) from the Cretaceous of Mongolia" (PDF). American Museum Novitates (3530): 1–42. doi:10.1206/0003-0082(2006)3530[1:YDANPC]2.0.CO;2.
  38. ^ a b c d Bohlin, B. (1953). Fossil reptiles from Mongolia and Kansu. Reports from the Scientific Expedition to the North-western Provinces of China under Leadership of Dr. Sven Hedin. VI. Vertebrate Palaeontology 6. The Sino-Swedish Expedition Publications 37, 113 pp
  39. ^ a b c d e You, H.; Li, D.; Ji, Q.; Lamanna, H.; Dodson, P. (2005). "On a new genus of basal Neoceratopsian dinosaur from the Early Cretaceous of Gansu Province, China". Acta Geologica Sinica. 79 (5): 593–597.
  40. ^ Butler, Richard (2010-07-01). "Auroraceratops type, Gongpoquan Basin". Paleobiology Database. Retrieved 2023-05-19.
  41. ^ a b c d e Dodson, P. (1986). "Avaceratops lammersi: a new ceratopsid from the Judith River Formation of Montana". Proceedings of the Academy of Natural Sciences of Philadelphia. 138 (2): 305–317.
  42. ^ a b c d e Maryańska, T.; Osmólska, H. (1975). "Protoceratopsidae (Dinosauria) of Asia" (PDF). Palaeontologia Polonica. 33: 134−143.
  43. ^ Watabe, M., Suzuki, S., 2000a. Report on the Japan-Mongolia Joint Paleontological Expedition to the Gobi desert, 1993. Hayashibara Museum of Natural SciencesResearch Bulletin 1, 17 29.
  44. ^ a b c d e f Makovicky, P. J.; Norell, M. A. (2006). "Yamaceratops dorngobiensis, a New Primitive Ceratopsian (Dinosauria: Ornithischia) from the Cretaceous of Mongolia" (PDF). American Museum Novitates (3530): 1–42. doi:10.1206/0003-0082(2006)3530[1:YDANPC]2.0.CO;2. hdl:2246/5808.
  45. ^ a b c d Tereshchenko, V.; Alifanov, V. R. (2003). "Bainoceratops efremovi, a New Protoceratopid Dinosaur (Protoceratopidae, Neoceratopsia) from the Bain-Dzak Locality (South Mongolia)". Paleontological Journal. 37 (3): 293–302.
  46. ^ a b c d e Yu, Congyu; Prieto-Marquez, Albert; Chinzorig, Tsogtbaatar; Badamkhatan, Zorigt; Norell, Mark (2020-09-10). "A neoceratopsian dinosaur from the early Cretaceous of Mongolia and the early evolution of ceratopsia". Communications Biology. 3 (1): 499. doi:10.1038/s42003-020-01222-7. ISSN 2399-3642. PMC 7484756. PMID 32913206.
  47. ^ a b c d Dalman SG, Jasinski SE, Lucas SG (2022). "A new chasmosaurine ceratopsid from the Upper Cretaceous (Campanian) Farmington Member of the Kirtland Formation, New Mexico". New Mexico Museum of Natural History and Science Bulletin. 90: 127–153.
  48. ^ a b c d e Gilmore, Charles W. (1914). "A new ceratopsian dinosaur from the upper cretaceous of Montana, with note on Hypacrosaurus". Smithsonian Miscellaneous Collections. 63 (3): 1–10. hdl:10088/23520.
  49. ^ a b c d e f g Andrew T. McDonald & John R. Horner, (2010). "New Material of "Styracosaurus" ovatus from the Two Medicine Formation of Montana". Pages 156–168 in: Michael J. Ryan, Brenda J. Chinnery-Allgeier, and David A. Eberth (eds), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, Indiana University Press, Bloomington and Indianapolis, IN.
  50. ^ a b Ryan, Michael J.; Holmes, Robert; Russell, A.P. (2007). "A revision of the late Campanian centrosaurine ceratopsid genus Styracosaurus from the Western Interior of North America". Journal of Vertebrate Paleontology. 27 (4): 944–962. doi:10.1671/0272-4634(2007)27[944:AROTLC]2.0.CO;2. S2CID 86218327. Retrieved 2010-08-19.
  51. ^ a b c d Wick, S. L.; Lehman, T. M. (2013). "A new ceratopsian dinosaur from the Javelina Formation (Maastrichtian) of West Texas and implications for chasmosaurine phylogeny". Naturwissenschaften. 100 (7): 667–82. Bibcode:2013NW....100..667W. doi:10.1007/s00114-013-1063-0. PMID 23728202. S2CID 16048008.
  52. ^ Fowler, D. W.; Freedman Fowler, E. A. (2020). "Transitional evolutionary forms in chasmosaurine ceratopsid dinosaurs: evidence from the Campanian of New Mexico". PeerJ. 8: e9251. doi:10.7717/peerj.9251. PMC 7278894. PMID 32547873.
  53. ^ Dalman, Sebastian G.; Lucas, Spencer G.; Jasinski, Steven E.; Longrich, Nicholas R. (2021-09-29). "Sierraceratops turneri, a new chasmosaurine ceratopsid from the Hall Lake Formation (Upper Cretaceous) of south-central New Mexico". Cretaceous Research. 130: 105034. Bibcode:2022CrRes.13005034D. doi:10.1016/j.cretres.2021.105034. ISSN 0195-6671. S2CID 244210664.
  54. ^ a b c Kurzanov, S. M. (1990). "Новый род протоцератопсид из позднего мела Монголии" [A new Late Cretaceous protoceratopsid genus from Mongolia] (PDF). Paleontological Journal (in Russian) (4): 91−97.
  55. ^ Czepiński, Ł. (2019). "Ontogeny and variation of a protoceratopsid dinosaur Bagaceratops rozhdestvenskyi from the Late Cretaceous of the Gobi Desert" (PDF). Historical Biology. 32 (10): 1394–1421. doi:10.1080/08912963.2019.1593404. S2CID 132780322. Archived from the original (PDF) on 2021-07-08. Retrieved 2023-05-25.
  56. ^ a b "†Centrosaurus apertus Lambe 1905 (ceratopsid)". Paleobiology Database. Retrieved 2023-05-19.
  57. ^ a b Lambe L., M. (1902). "New genera and species from the Belly River Series (Mid-Cretaceous)". Geological Survey of Canada Contributions to Canadian Palaeontology. 3: 25–81. doi:10.5281/zenodo.3233762.
  58. ^ Lambe, L.M. (1904). "On the squamoso-parietal crest of the horned dinosaurs Centrosaurus apertus and Monoclonius canadensis from the Cretaceous of Alberta". Transactions of the Royal Society of Canada. Series 2. 10 (4): 1–9.
  59. ^ a b c d Chinnery, Brenda J.; Horner, John R. (2007). "A new neoceratopsian dinosaur linking North American and Asian taxa". Journal of Vertebrate Paleontology. 27 (3): 625–641. doi:10.1671/0272-4634(2007)27[625:ANNDLN]2.0.CO;2. S2CID 86091277.
  60. ^ a b c d Marsh, O.C. (1888). "A new family of horned Dinosauria, from the Cretaceous". The American Journal of Science. Series 3. 36 (216): 477–478. Bibcode:1888AmJS...36..477M. doi:10.2475/ajs.s3-36.216.477. S2CID 130243398.
  61. ^ Penkalski, P.G., 1993, "The morphology of Avaceratops lammersi, a primitive ceratopsid from the Campanian of Montana", Journal of Vertebrate Paleontology 13(3, supplement): 52A
  62. ^ P. Dodson and P. J. Currie, 1990, "Neoceratopsia". In: D.B. Weishampel, H. Osmolska, and P. Dodson (eds.), The Dinosauria. First Edition. University of California Press, Berkeley pp 593-618
  63. ^ a b c Dodson, Peter; et al. (1993). "Chasmosaurus". The Age of Dinosaurs. Publications International. pp. 110–111. ISBN 0-7853-0443-6.
  64. ^ Lull, R.S., 1933, A revision of the Ceratopsia or horned dinosaurs. Memoirs of the Peabody Museum of Natural History 3(3): 1–175
  65. ^ a b c d e f Campbell, James A.; Ryan, Michael J.; Holmes, Robert B.; Schröder-Adams, Claudia J. (2016). "A Re-Evaluation of the Chasmosaurine Ceratopsid Genus Chasmosaurus (Dinosauria: Ornithischia) from the Upper Cretaceous (Campanian) Dinosaur Park Formation of Western Canada". PLOS ONE. 11 (1): e0145805. Bibcode:2016PLoSO..1145805C. doi:10.1371/journal.pone.0145805. PMC 4699738. PMID 26726769.
  66. ^ T.M. Lehman, 1990, "The ceratopsian subfamily Chasmosaurinae: sexual dimorphism and systematics", In: K. Carpenter and P. J. Currie (eds.), Dinosaur Systematics: Perspectives and Approaches, Cambridge University Press, Cambridge, pp. 211–229
  67. ^ a b c d e Barnett, V.H. (2021-10-01). "Eoceratops canadensis Lambe, 1915". Smithsonian Institution. Retrieved 2023-05-19.
  68. ^ Lambe, L.M. (1915). "On Eoceratops canadensis, gen. nov., with remarks on other genera of Cretaceous horned dinosaurs". Canada Geological Survey Museum Bulletin. 24: 1–49.
  69. ^ a b c Brown, B., 1933, "A new longhorned Belly River ceratopsian", American Museum Novitates 669: 1–3
  70. ^ a b c d e Longrich, Nicholas R. (2010). "Mojoceratops perifania, A New Chasmosaurine Ceratopsid from the Late Campanian of Western Canada". Journal of Paleontology. 84 (4): 681–694. Bibcode:2010JPal...84..681L. doi:10.1666/09-114.1. S2CID 129168541.
  71. ^ Sternberg, C.M., 1940, "Ceratopsidae from Alberta", Journal of Paleontology 14(5): 468–480
  72. ^ a b c Longrich, Nicholas (2015). "Systematics of Chasmosaurus - new information from the Peabody Museum skull, and the use of phylogenetic analysis for dinosaur alpha taxonomy". F1000Research. 4: 1468. doi:10.12688/f1000research.7573.1.
  73. ^ a b c d Loewen, M.A., Sampson, S.D., Lund, E.K., Farke, A.A., Aguillón-Martínez, M.C., de Leon, C.A., Rodríguez-de la Rosa, R.A., Getty, M.A., Eberth, D.A., 2010, "Horned Dinosaurs (Ornithischia: Ceratopsidae) from the Upper Cretaceous (Campanian) Cerro del Pueblo Formation, Coahuila, Mexico", In: Michael J. Ryan, Brenda J. Chinnery-Allgeier, and David A. Eberth (eds), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, Indiana University Press, 656 pp.
  74. ^ a b c d e f C. M. Sternberg. 1945. Pachycephalosauridae proposed for dome-headed dinosaurs, Stegoceras lambei, n. sp., described. Journal of Paleontology 19(5):534-538
  75. ^ a b c d e f g h i j k l Sullivan, R. M. (2003). "Revision of the dinosaur Stegoceras Lambe (Ornithischia, Pachycephalosauridae)". Journal of Vertebrate Paleontology. 23: 181–207. doi:10.1671/0272-4634(2003)23[181:rotdsl]2.0.co;2. S2CID 85894105.
  76. ^ Ryan, M. J.; Evans, D. C.; Shepherd, K. M.; Sues, H. (2012). "A new ceratopsid from the Foremost Formation (middle Campanian) of Alberta". Canadian Journal of Earth Sciences. 49 (10): 1251. Bibcode:2012CaJES..49.1251R. doi:10.1139/e2012-056.
  77. ^ a b c Ryan, M. J.; Russell, A. P. (2005). "A new centrosaurine ceratopsid from the Oldman Formation of Alberta and its implications for centrosaurine taxonomy and systematics". Canadian Journal of Earth Sciences. 42 (7): 1369. Bibcode:2005CaJES..42.1369R. doi:10.1139/e05-029. hdl:1880/47001.
  78. ^ a b c Dollo, L., 1883, "Note sur les restes de dinosauriens rencontrées dans le Crétacé supérieure de la Belgique", Bulletin du Musée royale d' Histoire naturelle de Belgique, 2: 205-221
  79. ^ Godefroit, Pascal; Lambert, Olivier (2007). "A re-appraisal of Craspedodon lonzeensis Dollo, 1883 from the Upper Cretaceous of Belgium: the first record of a neoceratopsian dinosaur in Europe?". Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre. 77: 83–93.
  80. ^ a b c d e Dalman, Sebastian G.; Hodnett, John-Paul M.; Lichtig, Asher J.; Lucas, Spencer G. (2018). "A new ceratopsid dinosaur (Centrosaurinae: Nasutoceratopsini) from the Fort Crittenden Formation, Upper Cretaceous (Campanian) of Arizona". New Mexico Museum of Natural History and Science Bulletin. 79: 141–164.
  81. ^ a b c d Kirkland, J.I. and DeBlieux, D.D. (2010). "New basal centrosaurine ceratopsian skulls from the Wahweap Formation (Middle Campanian), Grand Staircase–Escalante National Monument, southern Utah", In: Ryan, M.J., Chinnery-Allgeier, B.J., and Eberth, D.A. (eds.) New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Bloomington, Indiana University Press, pp. 117–140
  82. ^ Beveridge, Tegan L.; Roberts, Eric M.; Ramezani, Jahandar; Titus, Alan L.; Eaton, Jeffrey G.; Irmis, Randall B.; Sertich, Joseph J.W. (April 2022). "Refined geochronology and revised stratigraphic nomenclature of the Upper Cretaceous Wahweap Formation, Utah, U.S.A. and the age of early Campanian vertebrates from southern Laramidia". Palaeogeography, Palaeoclimatology, Palaeoecology. 591: 110876. Bibcode:2022PPP...59110876B. doi:10.1016/j.palaeo.2022.110876. ISSN 0031-0182. S2CID 246766015.
  83. ^ a b c d Bakker, Robert; Sullivan, Robert; Porter, Victor; Larson, Peter; Saulsbury, Steven (2006). "Dracorex hogwartsia, n. gen., n. sp., a spiked, flat-headed pachycephalosaurid dinosaur from the Upper Cretaceous Hell Creek Formation of South Dakota". New Mexico Museum of Natural History and Science Bulletin. 35: 331–346.
  84. ^ Horner, J. R.; Goodwin, M. B. (2009). Sereno, Paul (ed.). "Extreme Cranial Ontogeny in the Upper Cretaceous Dinosaur Pachycephalosaurus". PLOS ONE. 4 (10): e7626. Bibcode:2009PLoSO...4.7626H. doi:10.1371/journal.pone.0007626. PMC 2762616. PMID 19859556.
  85. ^ Goodwin, Mark B.; Evans, David C. (2016). "The early expression of squamosal horns and parietal ornamentation confirmed by new end-stage juvenile Pachycephalosaurus fossils from the Upper Cretaceous Hell Creek Formation, Montana". Journal of Vertebrate Paleontology. 36 (2): e1078343. Bibcode:2016JVPal..36E8343G. doi:10.1080/02724634.2016.1078343. ISSN 0272-4634. S2CID 131282984.
  86. ^ a b c d Sampson, S.D. (1995). "Two new horned dinosaurs from the Upper Cretaceous Two Medicine Formation of Montana; with a phylogenetic analysis of the Centrosaurinae (Ornithischia: Ceratopsidae)". Journal of Vertebrate Paleontology. 15 (4): 743–760. Bibcode:1995JVPal..15..743S. doi:10.1080/02724634.1995.10011259.
  87. ^ a b c Wu, X-C.; Brinkman, D.B.; Eberth, D.A.; Braman, D.R. (2007). "A new ceratopsid dinosaur (Ornithischia) from the uppermost Horseshoe Canyon Formation (upper Maastrichtian), Alberta, Canada". Canadian Journal of Earth Sciences. 44 (9): 1243–1265. Bibcode:2007CaJES..44.1243W. doi:10.1139/E07-011.
  88. ^ a b c Arbour, Victoria M.; Graves, Milton C. (2008). Sues, Hans-Dieter (ed.). "An ornithischian dinosaur from the Sustut Basin, north-central British Columbia, Canada". Canadian Journal of Earth Sciences. 45 (4): 457–463. Bibcode:2008CaJES..45..457A. doi:10.1139/E08-009. ISSN 0008-4077.
  89. ^ Grossman, Nina (November 7, 2019). "VIDEO: Victoria museum unveils 'Buster' a new unique-to-B.C. dinosaur". Victoria News.
  90. ^ a b c d Sullivan, R.M. (2006). "A taxonomic review of the Pachycephalosauridae (Dinosauria: Ornithischia)" (PDF). In Lucas, S.G.; Sullivan, R.M. (eds.). Late Cretaceous vertebrates from the Western Interior. New Mexico Museum of Natural History and Science Bulletin. Vol. 35. pp. 347–365. Archived from the original (PDF) on 2007-09-27. Retrieved 2016-11-26.
  91. ^ Schott, R.K.; Evans, D.C. (2016). "Cranial variation and systematics of Foraminacephale brevis gen. nov. and the diversity of pachycephalosaurid dinosaurs (Ornithischia: Cerapoda) in the Belly River Group of Alberta, Canada". Zoological Journal of the Linnean Society. doi:10.1111/zoj.12465.
  92. ^ a b c Ishikawa, H.; Tsuihiji, T.; Manabe, M. (2023). "Furcatoceratops elucidans, a new centrosaurine (Ornithischia: Ceratopsidae) from the upper Campanian Judith River Formation, Montana, USA". Cretaceous Research. 151. 105660. Bibcode:2023CrRes.15105660I. doi:10.1016/j.cretres.2023.105660. S2CID 260046917.
  93. ^ a b c d Perle, A.; Maryańska, T.; Osmólska, H. (1982). "Goyocephale lattimorei gen. et sp. n., a new flat -headed pachycephalosaur (Ornithlschia , Dinosauria) from the Upper Cretaceous of Mongolia" (PDF). Acta Palaeontologica Polonica. 27 (1–4): 115–127.
  94. ^ a b c Mateus, O. (2008). "Two ornithischian dinosaurs renamed: Microceratops Bohlin 1953 and Diceratops Lull 1905". Journal of Paleontology. 82 (2): 423. doi:10.1666/07-069.1. S2CID 86021954.
  95. ^ Wall, William P.; Galton, Peter M. (1979). "Notes on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America, with comments on their status as ornithopods". Canadian Journal of Earth Sciences. 16 (6): 1176–1186. Bibcode:1979CaJES..16.1176W. doi:10.1139/e79-104.
  96. ^ a b c d Dyer, Aaron D.; Powers, Mark J.; Currie, Philip J. (2023). "Problematic putative pachycephalosaurids: Synchrotron µCT imaging shines new light on the anatomy and taxonomic validity of Gravitholus albertae from the Belly River Group (Campanian) of Alberta, Canada". Vertebrate Anatomy Morphology Palaeontology. 10 (1): 65–110. doi:10.18435/vamp29388. ISSN 2292-1389. S2CID 257046495.
  97. ^ a b Ryan, M.J.; Micucci, L.; Rizo, H.; Sullivan, C.; Lee, Y.-N.; Evans, D.C. (2023). "New Late Cretaceous leptoceratopsid (Dinosauria: Ceratopsia) from the Oldman Formation (Campanian) of Alberta, Canada". In Lee, Y.-N. (ed.). Windows into Sauropsid and Synapsid Evolution: Essays in Honor of Prof. Louis L. Jacobs. Seoul: Dinosaur Science Center Press. pp. 151–165. ISBN 978-89-5708-358-1.
  98. ^ a b c d e f g h Ryan, Michael J.; Evans, David C.; Currie, Philip J.; Brown, Caleb M.; Brinkman, Don (2012). "New leptoceratopsids from the Upper Cretaceous of Alberta, Canada". Cretaceous Research. 35: 69–80. Bibcode:2012CrRes..35...69R. doi:10.1016/j.cretres.2011.11.018.
  99. ^ a b c d Liyong, Jin; Chen Jun, Zan Shuqin and Pascal Godefroit; Zan, Shuqin; Godefroit, Pascal (2009). "A New Basal Neoceratopsian Dinosaur from the Middle Cretaceous of Jilin Province, China". Acta Geologica Sinica. 83 (2): 200. doi:10.1111/j.1755-6724.2009.00023.x. S2CID 129656123.
  100. ^ WANG, Guodong; CHENG, Rihui; WANG, Pujun; GAO, Youfeng; WANG, Chengshan; REN, Yanguang; HUANG, Qinghua (March 2009). "Description of Cretaceous Sedimentary Sequence of the Quantou Formation Recovered by CCSD-SK-Is Borehole in Songliao Basin: Lithostratigraphy, Sedimentary Facies and Cyclic Stratigraphy". Earth Science Frontiers. 16 (2): 324–338. Bibcode:2009ESF....16..324W. doi:10.1016/s1872-5791(08)60078-0. ISSN 1872-5791.
  101. ^ a b c d e f g h i Maryańska, T.; Osmólska, H. (1974). "Pachycephalosauria, a new suborder of ornithischian dinosaurs" (PDF). Palaeontologica Polonica (30): 45−102.
  102. ^ Longrich, N.R., Sankey, J. and Tanke, D. (2010). "Texacephale langstoni, a new genus of pachycephalosaurid (Dinosauria: Ornithischia) from the upper Campanian Aguja Formation, southern Texas, USA." Cretaceous Research, . doi:10.1016/j.cretres.2009.12.002
  103. ^ Evans, D. C.; Hayashi, S.; Chiba, K.; Watabe, M.; Ryan, M. J.; Lee, Y.-N.; Currie, P. J.; Tsogtbaatar, K.; Barsbold, R. (2018). "Morphology and histology of new cranial specimens of Pachycephalosauridae (Dinosauria: Ornithischia) from the Nemegt Formation, Mongolia". Palaeogeography, Palaeoclimatology, Palaeoecology. 494: 121−134. Bibcode:2018PPP...494..121E. doi:10.1016/j.palaeo.2017.11.029.
  104. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad ae af ag ah ai aj ak al am an Sereno, Paul C. (2010). "Taxonomy, Cranial Morphology, and Relationships of Parrot-Beaked Dinosaurs (Ceratopsia: Psittacosaurus)" (PDF). New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Indiana University Press, Bloomington and Indianapolis, IN.
  105. ^ a b You, H., and X. Xu. 2005. An adult specimen of Hongshanosaurus houi (Dinosauria: Psittacosauridae) from the Lower Cretaceous of western Liaoning Province, China. Acta Geologica Sinica 79: 168–173.
  106. ^ a b c d Han, Fenglu; Forster, Catherine A.; Clark, James M.; Xu, Xing (9 December 2015). "A New Taxon of Basal Ceratopsian from China and the Early Evolution of Ceratopsia". PLOS One. 10 (12): e0143369. Bibcode:2015PLoSO..1043369H. doi:10.1371/journal.pone.0143369. PMC 4674058. PMID 26649770.
  107. ^ a b c d He, Yiming; Makovicky, Peter J.; Wang, Kebai; Chen, Shuqing; Sullivan, Corwin; Han, Fenglu; Xing XuMichael J. Ryan; Evans, David C.; Currie, Philip J.; Brown, Caleb M.; Brinkman, Don (2015). "A New Leptoceratopsid (Ornithischia, Ceratopsia) with a Unique Ischium from the Upper Cretaceous of Shandong Province, China". PLOS ONE. 10 (12): e0144148. Bibcode:2015PLoSO..1044148H. doi:10.1371/journal.pone.0144148. PMC 4689537. PMID 26701114.
  108. ^ a b c Wangshi Group in the Paleobiology Database
  109. ^ a b c d Longrich, N. R. (2013). "Judiceratops tigris, a New Horned Dinosaur from the Middle Campanian Judith River Formation of Montana". Bulletin of the Peabody Museum of Natural History. 54: 51–65. doi:10.3374/014.054.0103. S2CID 129801786.
  110. ^ a b c d e Lee, Yuong-Nam; Ryan, Michael J.; Kobayashi, Yoshitsugu (2011). "The first ceratopsian dinosaur from South Korea" (PDF). Naturwissenschaften. 98 (1): 39–49. Bibcode:2011NW.....98...39L. doi:10.1007/s00114-010-0739-y. PMID 21085924. S2CID 23743082.
  111. ^ a b c d e f g h i j Sampson, Scott D.; Loewen, Mark A.; Farke, Andrew A.; Roberts, Eric M.; Forster, Catherine A.; Smith, Joshua A. & Titus, Alan L. (2010). "New Horned Dinosaurs from Utah Provide Evidence for Intracontinental Dinosaur Endemism". PLOS ONE. 5 (9): e12292. Bibcode:2010PLoSO...512292S. doi:10.1371/journal.pone.0012292. PMC 2929175. PMID 20877459.
  112. ^ a b c d e L. A. Nessov, 1995, Dinozavri severnoi Yevrazii: Novye dannye o sostave kompleksov, ekologii i paleobiogeografii, Institute for Scientific Research on the Earth's Crust, St. Petersburg State University, St. Petersburg pp. 1-156
  113. ^ a b c d e B. Brown. 1914. Leptoceratops, a new genus of Ceratopsia from the Edmonton Cretaceous of Alberta. Bulletin of the American Museum of Natural History 33(36):567-580
  114. ^ a b c d Xu, X.; Makovicky, P.J.; Wang, X; Norell, M.A. & You, H. (2002). "A ceratopsian dinosaur from China and the early evolution of Ceratopsia". Nature. 416 (6878): 314–317. Bibcode:2002Natur.416..314X. doi:10.1038/416314a. PMID 11907575. S2CID 4322101.
  115. ^ Chang, S.-C.; Gao, K.-Q.; Zhou, Z.-F.; Jourdan, F. (2017). "New chronostratigraphic constraints on the Yixian Formation with implications for the Jehol Biota". Palaeogeography, Palaeoclimatology, Palaeoecology. 487: 399–406. Bibcode:2017PPP...487..399C. doi:10.1016/j.palaeo.2017.09.026.
  116. ^ a b Loewen, Mark A.; Sertich, Joseph J. W.; Sampson, Scott; O’Connor, Jingmai K.; Carpenter, Savhannah; Sisson, Brock; Øhlenschlæger, Anna; Farke, Andrew A.; Makovicky, Peter J.; Longrich, Nick; Evans, David C. (20 June 2024). "Lokiceratops rangiformis gen. et sp. nov. (Ceratopsidae: Centrosaurinae) from the Campanian Judith River Formation of Montana reveals rapid regional radiations and extreme endemism within centrosaurine dinosaurs". PeerJ. 12: e17224. doi:10.7717/peerj.17224. ISSN 2167-8359. PMC 11193970. PMID 38912046.
  117. ^ a b c d e Lund, Eric K.; O'Connor, Patrick M.; Loewen, Mark A.; Jinnah, Zubair A. (2016). "A New Centrosaurine Ceratopsid, Machairoceratops cronusi gen et sp. nov., from the Upper Sand Member of the Wahweap Formation (Middle Campanian), Southern Utah". PLOS ONE. 11 (5): e0154403. Bibcode:2016PLoSO..1154403L. doi:10.1371/journal.pone.0154403. PMC 4871575. PMID 27192148.
  118. ^ a b c d You, H.; Dong, Z. (2003). "A New Protoceratopsid (Dinosauria: Neoceratopsia) from the Late Cretaceous of Inner Mongolia, China". Acta Geologica Sinica (English Edition). 77 (3): 299−303. doi:10.1111/j.1755-6724.2003.tb00745.x.
  119. ^ Godefroit, Pascal; Currie, Philip J.; Hong, Li; Shang Chang Yong; Zhi-ming, Dong (2008). "A new species of Velociraptor (Dinosauria: Dromaeosauridae) from the Upper Cretaceous of northern China". Journal of Vertebrate Paleontology. 28 (2): 432–438. doi:10.1671/0272-4634(2008)28[432:ANSOVD]2.0.CO;2. S2CID 129414074.
  120. ^ Alifanov, V. R. (2008). "The Tiny Horned Dinosaur Gobiceratops minutus gen. et sp. nov. (Bagaceratopidae, Neoceratopsia) from the Upper Cretaceous of Mongolia". Paleontological Journal. 42 (6): 621–633. doi:10.1134/S0031030108060087. S2CID 129893753.
  121. ^ a b c d e Ryan, Michael J.; Russell, Anthony P., and Hartman, Scott. (2010). "A New Chasmosaurine Ceratopsid from the Judith River Formation, Montana", In: Michael J. Ryan, Brenda J. Chinnery-Allgeier, and David A. Eberth (eds), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, Indiana University Press, 656 pp. ISBN 0-253-35358-0.
  122. ^ a b c d Dalman, Sebastian G.; Lucas, Spencer G.; Jasinki, Steven G.; Lichtig, Asher J.; Dodson, Peter (2021). "The oldest centrosaurine: a new ceratopsid dinosaur (Dinosauria: Ceratopsidae) from the Allison Member of the Menefee Formation (Upper Cretaceous, early Campanian), northwestern New Mexico, USA". PalZ. 95 (2): 291–335. doi:10.1007/s12542-021-00555-w. S2CID 234351502.
  123. ^ a b c d e Ryan, M. J.; Evans, D. C.; Currie, P. J.; Loewen, M. A. (2014). "A new chasmosaurine from northern Laramidia expands frill disparity in ceratopsid dinosaurs". Naturwissenschaften. 101 (6): 505–512. Bibcode:2014NW....101..505R. doi:10.1007/s00114-014-1183-1. PMID 24859020. S2CID 13957187.
  124. ^ a b c d Z. Dong. (1978). [A new genus of Pachycephalosauria from Laiyang, Shantung]. Vertebrata PalAsiatica 16(4):225-228.
  125. ^ a b c d e f g h i Ryan, M.J. (2006). "The status of the problematic taxon Monoclonius (Ornithischia: Ceratopsidae) and the recognition of adult-sized dinosaur taxa". Geological Society of America Abstracts with Programs. 38 (4): 62.
  126. ^ a b c d e f g h i j k l m n o p q r s t u v w x y z aa ab ac ad "†Centrosaurus apertus Lambe 1905 (ceratopsid)". The Paleobiology Database. Retrieved 2023-05-21.
  127. ^ a b c d e Sternberg, C.M. (1940). "Ceratopsidae from Alberta". Journal of Paleontology. 14 (5): 468–480.
  128. ^ a b c d e f "†Centrosaurus apertus Lambe 1905 (ceratopsid)". The Paleobiology Database. Retrieved 2023-05-21.
  129. ^ a b c d e f g h i j Cope, E. D. (1889). "The horned dinosaurs of the Laramie". The American Naturalist. 23 (272): 715–717. doi:10.1086/274991.
  130. ^ a b C. M. Sternberg. 1951. Complete skeleton of Leptoceratops gracilis Brown from the Upper Edmonton Member on Red Deer River, Alberta. National Museum of Canada Bulletin 123:225-255
  131. ^ a b c d e Brown, B.; Schlaikjer, E. M. (1942). "The skeleton of Leptoceratops with the description of a new species". American Museum Novitates (1169): 1–15.
  132. ^ a b c d e Zheng, Wenjie; Jin, Xingsheng; Xu, Xing (2015). "A psittacosaurid-like basal neoceratopsian from the Upper Cretaceous of central China and its implications for basal ceratopsian evolution". Scientific Reports. 5. doi:10.1038/srep14190. PMC 4585677.
  133. ^ a b c Eric Karl Lund (2010). "Nasutuceratops titusi, a new basal centrosaurine dinosaur (Ornithischia: Ceratopsidae) from the upper cretaceous Kaiparowits Formation, Southern Utah". Department of Geology and Geophysics University of Utah: 172 pp. Archived from the original on 2015-04-02.
  134. ^ a b M. A. Getty, M. A. Loewen, E. M. Roberts, A. L. Titus, and S. D. Sampson. 2010. Taphonomy of horned dinosaurs (Ornithischia: Ceratopsidae) from the late Campanian Kaiparowits Formation, Grand Staircase–Escalante National Monument, Utah. In M. J. Ryan, B. J. Chinnery-Allgeier, D. A. Eberth (eds.), New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium. Indiana University Press, Bloomington 478-494
  135. ^ a b c d e f g h i Fowler, D.W.; Freedman Fowler, E.A. (2020). "Transitional evolutionary forms in chasmosaurine ceratopsid dinosaurs: evidence from the Campanian of New Mexico". PeerJ. 8: e9251. doi:10.7717/peerj.9251. PMC 7278894. PMID 32547873.
  136. ^ a b c Hatcher, John Bell (1904). "Two new Ceratopsia from the Laramie of Converse County, Wyoming". American Journal of Science. Series 4. 4 (120): 413–419. doi:10.2475/ajs.s4-20.120.413.
  137. ^ a b Farke, A. A. (2011). Claessens, Leon (ed.). "Anatomy and Taxonomic Status of the Chasmosaurine Ceratopsid Nedoceratops hatcheri from the Upper Cretaceous Lance Formation of Wyoming, U.S.A". PLOS ONE. 6 (1): e16196. Bibcode:2011PLoSO...616196F. doi:10.1371/journal.pone.0016196. PMC 3024410. PMID 21283763.
  138. ^ Scannella, John B.; Horner, John R.; Claessens, Leon (2011). "Nedoceratops: An Example of a Transitional Morphology". PLOS ONE. 6 (12): e28705. Bibcode:2011PLoSO...628705S. doi:10.1371/journal.pone.0028705. PMC 3241274. PMID 22194891.
  139. ^ Rees, Tony (2006-09-20). "Notoceratops Tapia, 1918 †". Interim Register of Marine and Nonmarine Genera (IRMNG). Retrieved 2023-05-21.
  140. ^ Ibiricu, Lucio M.; Martínez, Rubén D.; Lamanna, Matthew C.; Casal, Gabriel A.; Luna, Marcelo; Harris, Jerald D.; Lacovara, Kenneth J. (August 2010). "A Medium-Sized Ornithopod (Dinosauria: Ornithischia) from the Upper Cretaceous Bajo Barreal Formation of Lago Colhué Huapi, Southern Chubut Province, Argentina" (PDF). Annals of Carnegie Museum. 79 (1): 39–50. doi:10.2992/007.079.0103. ISSN 0097-4463. S2CID 53407321.
  141. ^ Tapia, A. (1918), "Una mandibula de dinosaurio procedente de Patagonia", Physis 4: 369–370
  142. ^ a b c d Robert M. Sullivan and Spencer G. Lucas, 2010, "A New Chasmosaurine (Ceratopsidae, Dinosauria) from the Upper Cretaceous Ojo Alamo Formation (Naashoibito Member), San Juan Basin, New Mexico", In: Ryan, M.J., Chinnery-Allgeier, B.J., and Eberth, D.A. (eds.) New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, Bloomington, Indiana University Press, 656 pp.
  143. ^ Sullivan, Robert M.; Lucas, Spencer G. (2006). "The Kirtlandian land-vertebrate "age"-faunal composition, temporal position and biostratigraphic correlation in the nonmarine Upper Cretaceous of western North America". New Mexico Museum of Natural History and Science Bulletin. 35: 7–29.
  144. ^ Holtz, Thomas R. Jr. (2011) Dinosaurs: The Most Complete, Up-to-Date Encyclopedia for Dinosaur Lovers of All Ages, Winter 2010 Appendix.
  145. ^ Longrich, Nicholas R. (2011). "Titanoceratops ouranos, a giant horned dinosaur from the Late Campanian of New Mexico". Cretaceous Research. 32 (3): 264–276. Bibcode:2011CrRes..32..264L. doi:10.1016/j.cretres.2010.12.007.
  146. ^ a b c d e Wall, W. P.; Galton, P. M. (1979). "Notes on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America, with comments on their status as ornithopods". Canadian Journal of Earth Sciences. 16 (6): 1176–1186. Bibcode:1979CaJES..16.1176W. doi:10.1139/e79-104.
  147. ^ Williamson, T. E.; Carr, T. D. (2003). "A new genus of derived pachycephalosaurian from western North America". Journal of Vertebrate Paleontology. 22 (4): 779–801. doi:10.1671/0272-4634(2002)022[0779:ANGODP]2.0.CO;2. S2CID 86112901.
  148. ^ a b c d e f Galton, Peter M.; Sues, Hans-Dieter (1983). "New data on pachycephalosaurid dinosaurs (Reptilia: Ornithischia) from North America". Canadian Journal of Earth Sciences. 20 (3): 462–472. Bibcode:1983CaJES..20..462G. doi:10.1139/e83-043.
  149. ^ a b c d e Sternberg, C. M. (1950). "Pachyrhinosaurus canadensis, representing a new family of the Ceratopsia, from southern Alberta". National Museum of Canada Bulletin. 118: 109–120.
  150. ^ a b c d e Currie, Philip J.; Langston Jr., Wann; Tanke, Darren H. (2008). "A new species of Pachyrhinosaurus (Dinosauria, Ceratopsidae) from the Upper Cretaceous of Alberta, Canada". A New Horned Dinosaur from an Upper Cretaceous Bone Bed in Alberta. Canadian Science Publishing. doi:10.1139/9780660198194. ISBN 9780660198194. Retrieved 2023-05-22.
  151. ^ a b c d e Fiorillo, Anthony R.; Tykoski, Ronald S. (2012). "A new species of the centrosaurine ceratopsid Pachyrhinosaurus from the North Slope (Prince Creek Formation: Maastrichtian) of Alaska". Acta Palaeontologica Polonica. 57 (3): 561–573. doi:10.4202/app.2011.0033.
  152. ^ a b c d e Longrich, N., 2014, "The horned dinosaurs Pentaceratops and Kosmoceratops from the upper Campanian of Alberta and implications for dinosaur biogeography", Cretaceous Research, 51: 292-308
  153. ^ a b c d e f Mallon, Jordan C.; Ott, Christopher J.; Larson, Peter L.; Iuliano, Edward M.; Evans, David C. (2016). "Spiclypeus shipporum gen. et sp. nov., a Boldly Audacious New Chasmosaurine Ceratopsid (Dinosauria: Ornithischia) from the Judith River Formation (Upper Cretaceous: Campanian) of Montana, USA". PLOS ONE. 11 (5): e0154218. Bibcode:2016PLoSO..1154218M. doi:10.1371/journal.pone.0154218. PMC 4871577. PMID 27191389.
  154. ^ a b c d e C. Wiman, 1930, "Über Ceratopsia aus der Oberen Kreide in New Mexico", Nova Acta Regiae Societatis Scientiarum Upsaliensis, Series 4 7(2): 1-19
  155. ^ a b c d e H.F. Osborn, 1923, "A new genus and species of Ceratopsia from New Mexico, Pentaceratops sternbergii, American Museum Novitates 93: 1-3
  156. ^ a b c d e Horner, John R.; Goodwin, Mark B.; Evans, David C. (2023-04-14). "A new pachycephalosaurid from the Hell Creek Formation, Garfield County, Montana, U.S.A.". Journal of Vertebrate Paleontology. 42 (4): e2190369. doi:10.1080/02724634.2023.2190369. ISSN 0272-4634. S2CID 258154892.
  157. ^ a b c d "American Museum of Natural History - Division of Paleontology - FR 3950".
  158. ^ Dodson, P., Forster, C.A., and Sampson, S.D. (2004). Ceratopsidae. In: Weishampel, D.B., Dodson, P., and Osmólska, H. (eds.). The Dinosauria (second edition). University of California Press:Berkeley, 494-513. ISBN 0-520-24209-2.
  159. ^ a b c d e Chinnery, Brenda (2004-09-10). "Description of Prenoceratops pieganensis gen. et sp. nov. (Dinosauria: Neoceratopsia) from the Two Medicine Formation of Montana". Journal of Vertebrate Paleontology. 24 (3): 572–590. doi:10.1671/0272-4634(2004)024[0572:DOPPGE]2.0.CO;2. ISSN 0272-4634. S2CID 86541770.
  160. ^ "Meet Frannie the Prenoceratops". The Children's Museum of Indianapolis. Retrieved 2022-02-16.
  161. ^ a b c d e Granger, W. W.; Gregory, W. K. (1923). "Protoceratops andrewsi, a pre-ceratopsian dinosaur from Mongolia" (PDF). American Museum of Natural History Novitates (72): 1−9. hdl:2246/4670.
  162. ^ a b c d e Lambert, O.; Godefroit, P.; Li, H.; Shang, C.-Y.; Dong, Z. (2001). "A new Species of Protoceratops (Dinosauria, Neoceratopsia) from the Late Cretaceous of Inner Mongolia (P. R. China)" (PDF). Bulletin de l'Institut Royal des Sciences Naturelles de Belgique, Sciences de la Terre. 71: 5−28.
  163. ^ a b c d e Napoli, James G.; Hunt, Tyler; Erickson, Gregory M.; Norell, Mark A. (2019). "Psittacosaurus amitabha, a new species of ceratopsian dinosaur from the Ondai Sayr locality, central Mongolia". American Museum Novitates (3932): 1–36. doi:10.1206/3932.1. hdl:2246/6953. S2CID 199571348.
  164. ^ a b c d e Mayr, Gerald; Peters, Plodowski; Stephan, D.; Gerhard; Vogel, Olaf (2002). "Bristle-like integumentary structures at the tail of the horned dinosaur Psittacosaurus". Naturwissenschaften. 89 (8): 361–365. Bibcode:2002NW.....89..361M. doi:10.1007/s00114-002-0339-6. PMID 12435037. S2CID 17781405.
  165. ^ a b c Changfu, Zhou; Keqin, Gao; Fox, Richard C.; Shuihua, Chen (2006). "A new species of Psittacosaurus (Dinosauria: Ceratopsia) from the Early Cretaceous Yixian Formation, Liaoning, China". Palaeoworld. 15: 100–114. doi:10.1016/j.palwor.2005.11.001.
  166. ^ Sereno, P. C.; Zhao, X.; Brown, L.; Tan, L. (2007). "New psittacosaurid highlights skull enlargement in horned dinosaurs" (PDF). Acta Palaeontologica Polonica. 52 (2): 275–284.Open access icon
  167. ^ a b c d e Young, C. C. (1931). "On some new dinosaurs from western Suiyuan, Inner Mongolia". Bulletin of the Geological Society of China. 11 (3): 259–266. doi:10.1111/j.1755-6724.1932.mp11003005.x.
  168. ^ a b c Buffetaut, Eric; Suteethorn, Varavudh (1992). "A new species of the ornithischian dinosaur Psittacosaurus from the Early Cretaceous of Thailand". Palaeontology. 35: 801–812.
  169. ^ a b c Averianov, Alexander O.; Voronkevich, Alexei V.; Leshchinskiy, Sergei V.; Fayngertz, Alexei V. (2006). "A ceratopsian dinosaur Psittacosaurus sibiricus from the Early Cretaceous of West Siberia, Russia and its phylogenetic relationships". Journal of Systematic Palaeontology. 4 (4): 359–395. doi:10.1017/s1477201906001933. S2CID 84569578.
  170. ^ Golovneva, L. B.; Shchepetov, S. V. (April 2010). "Phytostratigraphy of Albian-Cenomanian sediments in the Kiya River basin (the Chulym-Yenisei area of the west Siberian lowland)". Stratigraphy and Geological Correlation. 18 (2): 153–165. Bibcode:2010SGC....18..153G. doi:10.1134/s0869593810020048. ISSN 0869-5938. S2CID 140540821.
  171. ^ a b Qingshan Group in the Paleobiology Database
  172. ^ a b c d Sereno, Paul C.; Xijin, Zhao (1988). "Psittacosaurus xinjiangensis (Ornithischia: Ceratopsia), a new psittacosaur from the Lower Cretaceous of northwestern China". Journal of Vertebrate Paleontology. 8 (4): 353–365. Bibcode:1988JVPal...8..353S. doi:10.1080/02724634.1988.10011724.
  173. ^ a b c d e Brown, Caleb M.; Henderson, Donald M. (June 4, 2015). "A new horned dinosaur reveals convergent evolution in cranial ornamentation in Ceratopsidae". Current Biology. 25 (12): 1641–8. doi:10.1016/j.cub.2015.04.041. PMID 26051892.
  174. ^ Royal Tyrrell Museum of Palaeontology [@RoyalTyrrell] (December 7, 2020). "First up is our Regaliceratops 'Hellboy.' Its short, stubby horns led Darren Tanke, who prepared the specimen, to name it after comic book character Hellboy © Mike Mignola. It also references the challenging process of excavating and preparing the specimen, which spanned 10 years https://t.co/N2p0K1Az9X" (Tweet). Archived from the original on December 7, 2020. Retrieved December 21, 2022 – via Twitter.
  175. ^ Rozadilla, Sebastián; Agnolín, Federico; Manabe, Makoto; Tsuihiji, Takanobu; Novas, Fernando E. (2021-09-01). "Ornithischian remains from the Chorrillo Formation (Upper Cretaceous), southern Patagonia, Argentina, and their implications on ornithischian paleobiogeography in the Southern Hemisphere". Cretaceous Research. 125: 104881. Bibcode:2021CrRes.12504881R. doi:10.1016/j.cretres.2021.104881. ISSN 0195-6671.
  176. ^ Rich, Thomas H.; Kear, Benjamin P.; Sinclair, Robert; Chinnery, Brenda; Carpenter, Kenneth; McHugh, Mary L.; Vickers-Rich, Patricia (2014). "Serendipaceratops arthurcclarkei Rich & Vickers-Rich, 2003 is an Australian Early Cretaceous ceratopsian". Alcheringa: An Australasian Journal of Palaeontology. 38 (4): 456–479. doi:10.1080/03115518.2014.894809.
  177. ^ a b c d e Dalman, S.G.; Lucas, S.G.; Jasinski, S.E.; Longrich, N.R. (2022). "Sierraceratops turneri, a new chasmosaurine ceratopsid from the Hall Lake Formation (Upper Cretaceous) of south-central New Mexico". Cretaceous Research. 130: Article 105034. Bibcode:2022CrRes.13005034D. doi:10.1016/j.cretres.2021.105034. S2CID 244210664.
  178. ^ a b c d e f Evans, David; Brown, Caleb M.; You, Hailu; Campione, Nicolás E. (2021). "Description and revised diagnosis of Asia's first recorded pachycephalosaurid, Sinocephale bexelli gen. nov., from the Upper Cretaceous of Inner Mongolia, China". Canadian Journal of Earth Sciences. 58 (10): 981–992. Bibcode:2021CaJES..58..981E. doi:10.1139/cjes-2020-0190. S2CID 244227050.
  179. ^ a b c d Xu, X.; Wang, K.; Zhao, X.; Li, D. (2010). "First ceratopsid dinosaur from China and its biogeographical implications". Chinese Science Bulletin. 55 (16): 1631–1635. Bibcode:2010ChSBu..55.1631X. doi:10.1007/s11434-009-3614-5. S2CID 128972108.
  180. ^ a b c d e f g h i j Williamson Thomas E.; Carr Thomas D. (2002). "A new genus of highly derived pachycephalosaurian from western North America". Journal of Vertebrate Paleontology. 22 (4): 779–801. doi:10.1671/0272-4634(2002)022[0779:angodp]2.0.co;2. S2CID 86112901.
  181. ^ Mallon Jordan C.; Evans David C.; Tokaryk Tim T.; Currie Margaret L. (2015). "First pachycephalosaurid (Dinosauria: Ornithischia) from the Frenchman Formation (upper Maastrichtian) of Saskatchewan, Canada". Cretaceous Research. 56: 426–431. Bibcode:2015CrRes..56..426M. doi:10.1016/j.cretres.2015.06.005.
  182. ^ "†Sphaerotholus edmontonensis Brown and Schlaikjer 1943 (ornithischian)". Paleobiology Database. Retrieved 2023-05-23.
  183. ^ Woodruff, D.C.; Goodwin, M.B.; Lyson, T.R.; Evans, D.C. (2021). "Ontogeny and variation of the pachycephalosaurine dinosaur Sphaerotholus buchholtzae, and its systematics within the genus". Zoological Journal of the Linnean Society. 193 (2): 563–601. doi:10.1093/zoolinnean/zlaa179.
  184. ^ a b c d e f Woodruff, D. Cary; Schott, Ryan K.; Evans, David C. (2023). "Two new species of small-bodied pachycephalosaurine (Dinosauria, Marginocephalia) from the uppermost Cretaceous of North America suggest hidden diversity in well-sampled formations". Papers in Palaeontology. 9 (6). doi:10.1002/spp2.1535.
  185. ^ a b c d e Farke, Andrew A.; Ryan, Michael J.; Barrett, Paul M.; Tanke, Darren H.; Braman, Dennis R.; Loewen, Mark A.; Graham, Mark R. (2011). "A new centrosaurine from the Late Cretaceous of Alberta, Canada, and the evolution of parietal ornamentation in horned dinosaurs" (PDF). Acta Palaeontologica Polonica. 56 (4): 691–702. doi:10.4202/app.2010.0121.
  186. ^ a b c d Jasinski, S. E.; Sullivan, R. M. (2011). "Re-evaluation of pachycephalosaurids from the Fruitland-Kirtland transition (Kirtlandian, late Campanian), San Juan Basin, New Mexico, with a description of a new species of Stegoceras and a reassessment of Texascephale langstoni" (PDF). Fossil Record 3. New Mexico Museum of Natural History and Science, Bulletin. 53: 202–215.
  187. ^ Jasinski, S. E.; Sullivan, R. M. (2016). "The validity of the Late Cretaceous pachycephalosaurid Stegoceras novomexicanum (Dinosauria: Pachycephalosauridae)". In Sullivan, Robert M.; Lucas, Spencer G. (eds.). Fossil Record 5: Bulletin 74. New Mexico Museum of Natural History and Science. pp. 107–116.
  188. ^ Williamson, T. E.; Brusatte, S. L. (2016). "Pachycephalosaurs (Dinosauria: Ornithischia) from the Upper Cretaceous (upper Campanian) of New Mexico: A reassessment of Stegoceras novomexicanum". Cretaceous Research. 62: 29–43. Bibcode:2016CrRes..62...29W. doi:10.1016/j.cretres.2016.01.012.
  189. ^ a b c d Wilson, John P.; Ryan, Michael J.; Evans, David C. (2020). "A new, transitional centrosaurine ceratopsid from the Upper Cretaceous Two Medicine Formation of Montana and the evolution of the Styracosaurus-line' dinosaurs". Royal Society Open Science. 7 (4): 200284. Bibcode:2020RSOS....700284W. doi:10.1098/rsos.200284. PMC 7211873. PMID 32431910.
  190. ^ a b c *Hermann Schmidt, 1969, "Stenopelix valdensis H. v. Meyer, der kleine Dinosaurier des norddeutschen Wealden", Paläontologische Zeitschrift 43(3/4): 194-198
  191. ^ *R. J. Butler and R. M. Sullivan, 2009, "The phylogenetic position of Stenopelix valdensis from the Lower Cretaceous of Germany and the early fossil record of Pachycephalosauria", Acta Palaeontologica Polonica 54(1): 21-34
  192. ^ a b c Giffin, Emily B.; Gabriel, Diane L.; Johnson, Rolf E. (22 January 1988). "A New Pachycephalosaurid Hell Creek Formation of Montana". Journal of Vertebrate Paleontology. 7 (4). Taylor & Francis, Ltd.: 398–407. doi:10.1080/02724634.1988.10011672. JSTOR 4523163. Retrieved 13 November 2020.
  193. ^ Paul, Gregory S. (2010). The Princeton Field Guide to Dinosaurs. Princeton, NJ: Princeton University Press. p. 244. ISBN 978-0-691-13720-9.
  194. ^ a b c d e Lambe, L.M. (1913). "A new genus and species from the Belly River Formation of Alberta". Ottawa Naturalist. 27: 109–116.
  195. ^ Wilson, John P.; Ryan, Michael J.; Evans, David C. (2020). "A new, transitional centrosaurine ceratopsid from the Upper Cretaceous Two Medicine Formation of Montana and the evolution of the "Styracosaurus-line" dinosaurs". Royal Society Open Science. 7 (4): 200284. Bibcode:2020RSOS....700284W. doi:10.1098/rsos.200284. PMC 7211873. PMID 32431910.
  196. ^ a b c Brown, Barnum; Erich Maren Schlaikjer (1937). "The skeleton of Styracosaurus with the description of a new species". American Museum Novitates (955): 12. hdl:2246/2191.
  197. ^ a b c d Christopher J. Ott and Peter L. Larson, 2010, "A New, Small Ceratopsian Dinosaur from the Latest Cretaceous Hell Creek Formation, Northwest South Dakota, United States: A Preliminary Description", In: Ryan, M.J., Chinnery-Allgeier, B.J., and Eberth, D.A. (eds.) New Perspectives on Horned Dinosaurs: The Royal Tyrrell Museum Ceratopsian Symposium, Bloomington, Indiana University Press, 656 pp.
  198. ^ Illies, Matthew M. Canoy, and Denver W. Fowler. "Triceratops with a kink: Co-ossification of five distal caudal vertebrae from the Hell Creek Formation of North Dakota." Cretaceous Research, 108 (2020): 104355.
  199. ^ a b c d Longrich, N.R.; Sankey, J. & Tanke, D. (2010). "Texacephale langstoni, a new genus of pachycephalosaurid (Dinosauria: Ornithischia) from the upper Campanian Aguja Formation, southern Texas, USA". Cretaceous Research. 31 (2): 274–284. Bibcode:2010CrRes..31..274L. doi:10.1016/j.cretres.2009.12.002.
  200. ^ a b c d Longrich, Nicholas R. (2011). "Titanoceratops ouranos, a giant horned dinosaur from the late Campanian of New Mexico". Cretaceous Research. 32 (3): 264–276. Bibcode:2011CrRes..32..264L. doi:10.1016/j.cretres.2010.12.007.
  201. ^ a b c d e f g h O.C. Marsh, 1891, "Notice of new vertebrate fossils", The American Journal of Science, series 3 42: 265-269
  202. ^ Colbert, E.H. and J.D. Bump, 1947, "A skull of Torosaurus from South Dakota and a revision of the genus:, Proceedings of the Academy of Natural Sciences of Philadelphia, 99: 93–106
  203. ^ Maiorino, Leonardo; Farke, Andrew A.; Kotsakis, Tassos; Piras, Paolo (2013). "Is Torosaurus Triceratops? Geometric Morphometric Evidence of Late Maastrichtian Ceratopsid Dinosaurs". PLOS ONE. 8 (11): e81608. doi:10.1371/journal.pone.0081608. PMID 24303058.
  204. ^ a b c d D.A. Lawson, 1976, "Tyrannosaurus and Torosaurus, Maestrichtian dinosaurs from Trans-Pecos, Texas", Journal of Paleontology 50(1): 158-164
  205. ^ a b c Sternberg, C. M. (1949). "The Edmonton fauna and description of a new Triceratops from the Upper Edmonton member; phylogeny of the Ceratopsidae". National Museum of Canada Bulletin. 113: 33–46.
  206. ^ a b c d e f g h i j k l "†Triceratops horridus Marsh 1889 (ceratopsid)". The Paleobiology Database. Retrieved 2023-05-24.
  207. ^ a b c d Cannon, George L. (2022-06-13). "Triceratops alticornis (Marsh, 1889)". Smithsonian Institution. NMNH - Paleobiology Dept. Retrieved 2023-05-24.
  208. ^ a b c d "Triceratops calicornis Marsh, 1898". Smithsonian Department of Paleobiology Collections. Smithsonian Institution. Retrieved 2023-05-24.
  209. ^ a b c d Hatcher, John B. (2022-06-13). "Triceratops elatus Marsh, 1891". Smithsonian Institution. NMNH - Paleobiology Dept. Retrieved 2023-05-24.
  210. ^ a b c Schlaikjer, E. M. 1935. Contributions to the stratigraphy and paleontology of the Goshen Hole area, Wyoming. II. The Torrington member of the Lance formation and a study of the new Triceratops. Bulletin of the Museum of Comparative Zoology 76(2):29–68.
  211. ^ a b c O. C. Marsh. 1889. Notice of gigantic horned Dinosauria from the Cretaceous. American Journal of Science 38:173-175
  212. ^ a b c d e f Cross, W. (2021-10-01). "Triceratops galeus Marsh, 1889". Smithsonian Institution. NMNH - Paleobiology Dept. Retrieved 2023-05-24.
  213. ^ a b c d Marsh, O.C. (1889a). "Notice of new American Dinosauria". American Journal of Science. 37 (220): 331–336. Bibcode:1889AmJS...37..331M. doi:10.2475/ajs.s3-37.220.331. S2CID 131729220. Archived from the original on September 29, 2018. Retrieved October 19, 2021.
  214. ^ "Wyoming Facts and Symbols - State of Wyoming".
  215. ^ a b c d e f g h i j Forster, Catherine A. (1996). "Species Resolution in Triceratops: Cladistic and Morphometric Approaches". Journal of Vertebrate Paleontology. 16 (2). Taylor & Francis, Ltd.: 259–270. Bibcode:1996JVPal..16..259F. doi:10.1080/02724634.1996.10011313. JSTOR 4523716.
  216. ^ a b Brown, Barnum; Kaisen, Peter C. (1933). "A gigantic ceratopsian dinosaur, Triceratops maximus, new species". American Museum Novitates (649): 1–9. hdl:2246/2064. Retrieved 2023-05-25.
  217. ^ a b c d Hatcher, Mr. John B. (2022). "Triceratops obtusus Marsh, 1898". Smithsonian Institution. National Museum of Natural History. Retrieved 2023-05-25.
  218. ^ Marsh, O.C. (1890). "Description of New Dinosaurian Reptiles". American Journal of Science. 39 (229): 81–87. doi:10.5281/zenodo.4740015. Retrieved 2023-05-25.
  219. ^ a b Lull, Richard Swann (1867). "Skull of Triceratops serratus". Bulletin of the American Museum of Natural History. 19 (30): 685–695. hdl:2246/1509. Retrieved 2023-05-25.
  220. ^ a b c d e Hatcher, Mr. John B. (2022-06-13). "Triceratops sulcatus Marsh, 1890". Smithsonian Institution. NMNH - Paleobiology Dept. Retrieved 2023-05-25.
  221. ^ a b c d Sues, Hans-Dieter; Averianov, Alexander (2009). "Turanoceratops tardabilis—the first ceratopsid dinosaur from Asia". Naturwissenschaften. 96 (5): 645–652. doi:10.1007/s00114-009-0518-9.
  222. ^ a b c d Maryańska, T.; Osmólska, H. (1974). "Pachycephalosauria, a new suborder of ornithischian dinosaurs" (PDF). Palaeontologica Polonica (30): 45−102.
  223. ^ a b c d Baird, Donald (1979). "The dome-headed dinosaur Tylosteus ornatus Leidy 1872 (Reptilia: Ornithischia: Pachycephalosauridae)". Notulae Naturae. 456: 1–11.
  224. ^ ICZN Opinion 1371, "Pachycephalosaurus Brown & Schlaikjer, 1943 and Troodon wyomingensis Gilmore, 1931 (Reptilia, Dinosauria): Conserved." Bulletin of Zoological Nomenclature, 43 (1): April 1986.
  225. ^ a b c d Kurzanov, S. M. (1992). "Новый род протоцератопсид из позднего мела Монголии" [A giant protoceratopsid from the Upper Cretaceous of Mongolia]. Paleontological Journal (in Russian): 81−93.
  226. ^ a b c d e Foster, Catherine A. (1993). "Taxomomic Validity of the Ceratopsid Dinosaur Ugrosaurus olsoni (Cobabe and Fastovsky)". Journal of Paleontology. 67 (2): 316–318. Bibcode:1993JPal...67..316F. doi:10.1017/S0022336000032273. JSTOR 1306003. S2CID 133184183. Retrieved 2023-05-23.
  227. ^ a b c R. B. Holmes; C. A. Forster; M. J. Ryan & K. M. Shepherd (2001). "A new species of Chasmosaurus (Dinosauria: Ceratopsia) from the Dinosaur Park Formation of southern Alberta". Canadian Journal of Earth Sciences. 38 (10): 1423–1438. Bibcode:2001CaJES..38.1423H. doi:10.1139/cjes-38-10-1423.
  228. ^ Lian-Hai, Hou (1977). "A new primitive Pachycephalosauria from Anhui, China.It is the second smallest dinosaur in world after microceratops" (PDF). Vertebrata PalAsiatica. 15 (3): 198–202.
  229. ^ a b c d Li, G.; Hirano, H.; Batten, D.J.; Wan, X.; Willems, H.; Zhang, X. (2010). "Biostratigraphic significance of spinicaudatans from the Upper Cretaceous Nanxiong Group in Guangdong, South China". Cretaceous Research. 31 (4): 387–395. Bibcode:2010CrRes..31..387L. doi:10.1016/j.cretres.2010.05.003.
  230. ^ a b c d e Evans, David C.; Ryan, Michael J. (2015). "Cranial Anatomy of Wendiceratops pinhornensis gen. et sp. nov., a Centrosaurine Ceratopsid (Dinosauria: Ornithischia) from the Oldman Formation (Campanian), Alberta, Canada, and the Evolution of Ceratopsid Nasal Ornamentation". PLOS ONE. 10 (7): e0130007. Bibcode:2015PLoSO..1030007E. doi:10.1371/journal.pone.0130007. PMC 4496092. PMID 26154293.
  231. ^ a b c d e Ryan, Michael J.; Evans, David C.; Shepherd, Kieran M. (2012). "A new ceratopsid from the Foremost Formation (middle Campanian) of Alberta". Canadian Journal of Earth Sciences. 49 (11): 1251–1262. Bibcode:2012CaJES..49.1251R. doi:10.1139/e2012-056.
  232. ^ a b c d e Xijin, Zhao; Zhengwu, Cheng; Xing, XU; Makovicky, Peter J. (2010). "A New Ceratopsian from the Upper Jurassic Houcheng Formation of Hebei, China". Acta Geologica Sinica - English Edition. 80 (4): 467–473. doi:10.1111/j.1755-6724.2006.tb00265.x.
  233. ^ a b c d e Xu, Xing; Forster, Catherine A.; Clark, James M.; Mo, Jinyou (2006). "A basal ceratopsian with transitional features from the Late Jurassic of northwestern China" (PDF). Proceedings of the Royal Society B: Biological Sciences. 273 (1598): 2135–2140. doi:10.1098/rspb.2006.3566. PMC 1635516. PMID 16901832.
  234. ^ a b c d Xu, Xing; Wang, Kebai; Zhao, Xijin; Sullivan, Corwin; Chen, Shuqing (2010). "A New Leptoceratopsid (Ornithischia: Ceratopsia) from the Upper Cretaceous of Shandong, China and Its Implications for Neoceratopsian Evolution". PLOS ONE. 5 (11): e13835. Bibcode:2010PLoSO...513835X. doi:10.1371/journal.pone.0013835. PMC 2973951. PMID 21079798.
  235. ^ a b c d e Wolfe, D.G.; Kirkland, J. (1998). "Zuniceratops christopheri n. gen. & n. sp., a ceratopsian dinosaur from the Moreno Hill Formation (Cretaceous, Turonian) of west-central New Mexico". Lower and Middle Cretaceous Terrestrial Ecosystems, New Mexico Museum of Natural History and Science Bulletin. 24: 303–317.
Retrieved from "https://wiki.riteme.site/w/index.php?title=List_of_marginocephalian_type_specimens&oldid=1258183750"