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2018 in non-avian dinosaur paleontology

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The year 2018 in non-avian dinosaur paleontology was eventful. Archosaurs include the only living dinosaur group — birds — and the reptile crocodilians, plus all extinct dinosaurs, extinct crocodilian relatives, and pterosaurs. Archosaur palaeontology is the scientific study of those animals, especially as they existed before the Holocene Epoch began about 11,700 years ago. This article records new taxa of fossil archosaurs of the non-avian variety that have been described during the year 2018, as well as other significant discoveries and events related to paleontology of archosaurs that occurred in the year 2018.

Research

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New taxa

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Name Novelty Status Authors Age Unit Location Notes Images

Acantholipan[164]

Gen. et sp. nov

Valid

Rivera-Sylva et al.

Late Cretaceous (Santonian)

Pen Formation

 Mexico

A member of the family Nodosauridae. Genus includes new species A. gonzalezi.

Adynomosaurus[165]

Gen. et sp. nov

Valid

Prieto-Márquez et al.

Late Cretaceous

Tremp Formation

 Spain

A hadrosaurid ornithopod belonging to the subfamily Lambeosaurinae. Genus includes new species A. arcanus. Announced in 2018; the final version of the article naming it was published in 2019.

Akainacephalus[166]

Gen. et sp. nov

Valid

Wiersma & Irmis

Late Cretaceous (late Campanian)

Kaiparowits Formation

 United States
( Utah)

A member of the family Ankylosauridae. The type species is A. johnsoni.

Known material and skeletal reconstructions in dorsal and lateral views

Anhuilong[167]

Gen. et sp. nov

Valid

Ren, Huang & You

Middle Jurassic

Hongqin Formation

 China

A mamenchisaurid sauropod. Genus includes new species A. diboensis. Announced in 2018; the final version of the article naming it was published in 2020.

Anodontosaurus inceptus[168]

Sp. nov

Valid

Penkalski

Late Cretaceous

Dinosaur Park Formation

 Canada
( Alberta)

A member of the family Ankylosauridae.

Skull of TMP 1997.132.1, the holotype specimen of Anodontosaurus inceptus[168]

Anomalipes[169]

Gen. et sp. nov

Valid

Yu et al.

Late Cretaceous

Wangshi Group

 China

A caenagnathid theropod. The type species is A. zhaoi.

Arkansaurus[170]

Gen. et sp. nov

Valid

Hunt & Quinn

Early Cretaceous (AlbianAptian)

Trinity Group

 United States
( Arkansas)

An ornithomimosaur theropod. Genus includes new species A. fridayi.

Reconstruction of Arkansaurus fridayi

Avimimus nemegtensis[171]

Sp. nov

Valid

Funston et al.

Late Cretaceous

Nemegt Formation

 Mongolia

An oviraptorosaurian. Announced in 2017; the final version of the article naming it was published in 2018.

Baalsaurus[172]

Gen. et sp. nov

Valid

Calvo & Riga

Late Cretaceous (Turonian-Coniacian)

Portezuelo Formation

 Argentina

A titanosaur sauropod. The type species is B. mansillai.

Bagualosaurus[173]

Gen. et sp. nov

Valid

Pretto, Langer & Schultz

Late Triassic

Santa Maria Formation

 Brazil

An early member of Sauropodomorpha. Genus includes new species B. agudoensis.

Reconstruction of Bagualosaurus agudoensis

Bannykus[174]

Gen. et sp. nov

Valid

Xu et al.

Early Cretaceous (Aptian)

Bayin-Gobi Formation

 China

An alvarezsaurian theropod. The type species is B. wulatensis.

Reconstruction of Bannykus wulatensis

Bayannurosaurus[175]

Gen. et sp. nov

Valid

Xu et al.

Early Cretaceous

Bayin-Gobi Formation

 China

A non-hadrosauriform ankylopollexian ornithopod. Genus includes new species B. perfectus.

Caihong[176]

Gen. et sp. nov

Valid

Hu et al.

Late Jurassic (Oxfordian)

Tiaojishan Formation

 China

A paravian theropod. The type species is C. juji.

Reconstruction of Caihong juji

Choconsaurus[177]

Gen. et sp. nov

Valid

Simón, Salgado & Calvo

Late Cretaceous (Cenomanian)

Huincul Formation

 Argentina

A titanosaur sauropod. The type species is C. baileywillisi. Announced in 2017; the final version of the article naming it was published in 2018.

Choyrodon[178]

Gen. et sp. nov

Valid

Gates et al.

Early Cretaceous (Albian)

Khuren Dukh Formation

 Mongolia

An iguanodontian ornithopod. The type species is C. barsboldi.

Crittendenceratops[179]

Gen. et sp. nov

Valid

Dalman et al.

Late Cretaceous (Campanian)

Fort Crittenden Formation

 United States
( Arizona)

A centrosaurine ceratopsid dinosaur belonging to the tribe Nasutoceratopsini. The type species is C. krzyzanowskii.

Reconstruction of Crittendenceratops krzyzanowskii

Diluvicursor[180]

Gen. et sp. nov

Valid

Herne et al.

Early Cretaceous (Albian)

Eumeralla Formation

 Australia

A small-bodied ornithopod. The type species is D. pickeringi.

Reconstruction of Diluvicursor pickeringi

Dryosaurus elderae[181]

Sp. nov

Valid

Carpenter & Galton

Late Jurassic

Morrison Formation

 United States
( Utah)

Dynamoterror[182]

Gen. et sp. nov

Valid

McDonald, Wolfe & Dooley

Late Cretaceous (early Campanian)

Menefee Formation

 United States
( New Mexico)

A tyrannosaurid theropod. The type species D. dynastes.

Ingentia[183]

Gen. et sp. nov

Valid

Apaldetti et al.

Late Triassic (late NorianRhaetian)

Quebrada del Barro Formation

 Argentina

An early member of Sauropodomorpha related to Lessemsaurus. Genus includes new species I. prima.

Invictarx[184]

Gen. et sp. nov

Valid

McDonald & Wolfe

Late Cretaceous (early Campanian)

Menefee Formation

 United States
( New Mexico)

A member of the family Nodosauridae. The type species is I. zephyri.

Jinyunpelta[185]

Gen. et sp. nov

Zheng et al.

Cretaceous (AlbianCenomanian)

Liangtoutang Formation

 China

A member of the family Ankylosauridae belonging to the subfamily Ankylosaurinae. The type species is J. sinensis.

Reconstruction of Jinyunpelta sinensis

Lavocatisaurus[186]

Gen. et sp. nov

Valid

Canudo et al.

Early Cretaceous (Aptian–early Albian)

Rayoso Formation

 Argentina

A rebbachisaurid sauropod. The type species is L. agrioensis.

Reconstruction of Lavocatisaurus agrioensis

Ledumahadi[187]

Gen. et sp. nov

Valid

McPhee et al.

Early Jurassic (Hettangian-Sinemurian)

Elliot Formation

 South Africa

An early member of Sauropodiformes. The type species is L. mafube.

Reconstruction of Ledumahadi mafube

Liaoningotitan[188]

Gen. et sp. nov

Valid

Zhou et al.

Early Cretaceous

Yixian Formation

 China

A titanosauriform sauropod. The type species is L. sinensis.

Lingwulong[189]

Gen. et sp. nov

Valid

Xu et al.

Late Early to early Middle Jurassic (late ToarcianBajocian)

Yanan Formation

 China

A dicraeosaurid sauropod. The type species is L. shenqi.

Reconstruction of Lingwulong shenqi

Macrocollum[190]

Gen. et sp. nov

Valid

Müller, Langer & Dias-da-Silva

Late Triassic (early Norian)

Caturrita Formation

 Brazil

An early member of Sauropodomorpha related to Unaysaurus. Genus includes new species M. itaquii.

Reconstruction of Macrocollum itaquii

Mansourasaurus[191]

Gen. et sp. nov

Valid

Sallam et al.

Late Cretaceous (Campanian)

Quseir Formation

 Egypt

A titanosaur sauropod. The type species is M. shahinae.

Reconstruction of Mansourasaurus shahinae

Maraapunisaurus[192]

Gen. et comb. nov

Valid

Carpenter

Late Jurassic (KimmeridgianTithonian)

Morrison Formation

 United States
 Colorado

A rebbachisaurid sauropod; a new genus for "Amphicoelias" fragillimus Cope (1878f).

Mongolostegus[193]

Gen. et sp. nov

Valid

Tumanova & Alifanov

Early Cretaceous (AptianAlbian)

Dzunbain Formation

 Mongolia

A member of Stegosauria. Genus includes new species M. exspectabilis.

Pilmatueia[194]

Gen. et sp. nov

Valid

Coria et al.

Early Cretaceous (Valanginian)

Mulichinco Formation

 Argentina

A dicraeosaurid sauropod. The type species is P. faundezi. Announced in 2018; the final version of the article naming it was published in 2019.

Platypelta[168]

Gen. et sp. nov

Valid

Penkalski

Late Cretaceous

Dinosaur Park Formation

 Canada
( Alberta)

A member of the family Ankylosauridae. Genus includes new species P. coombsi.

Skull of AMNH 5337, the holotype specimen of Platypelta coombsi[168]

Qiupanykus[195]

Gen. et sp. nov

Valid

et al.

Late Cretaceous (Maastrichtian)

Qiupa Formation

 China

An alvarezsaurid theropod. The type species is Q. zhangi.

Saltriovenator[196]

Gen. et sp. nov

Valid

Dal Sasso et al.

Early Jurassic (Sinemurian)

Saltrio Formation

 Italy

A ceratosaurian theropod. The type species is S. zanellai.

Reconstruction of Saltriovenator zanellai

Scolosaurus thronus[168]

Sp. nov

Valid

Penkalski

Late Cretaceous

Dinosaur Park Formation

 Canada
( Alberta)

A member of the family Ankylosauridae.

Skull of ROM 1930, the holotype specimen of Scolosaurus thronus[168]

Sibirotitan[197]

Gen. et sp. nov

Valid

Averianov et al.

Early Cretaceous (probably Barremian)

Ilek Formation

 Russia

A non-titanosaurian somphospondyl sauropod. Genus includes new species S. astrosacralis.

Thanos[198]

Gen. et sp. nov

Valid

Delcourt & Iori

Late Cretaceous (Santonian)

São José do Rio Preto Formation

 Brazil

An abelisaurid theropod. Genus includes new species T. simonattoi. Announced in 2018; the final version of the article naming it was published in 2020.

Tratayenia[199]

Gen. et sp. nov

Valid

Porfiri et al.

Late Cretaceous (Santonian)

Bajo de la Carpa Formation

 Argentina

A megaraptoran theropod. Genus includes new species T. rosalesi.

Volgatitan[200]

Gen. et sp. nov

Valid

Averianov & Efimov

Early Cretaceous (Hauterivian)

 Russia
( Ulyanovsk Oblast)

A titanosaur sauropod related to members of the group Lognkosauria. The type species is V. simbirskiensis.

Weewarrasaurus[201]

Gen. et sp. nov

Valid

Bell et al.

Late Cretaceous (Cenomanian)

Griman Creek Formation

 Australia

A small-bodied non-iguanodontian ornithopod. The type species is W. pobeni.

Xiyunykus[174]

Gen. et sp. nov

Valid

Xu et al.

Early Cretaceous (Barremian-Aptian?)

Tugulu Group

 China

An alvarezsaurian theropod. The type species is X. pengi.

Reconstruction of Xiyunykus pengi

Yizhousaurus[202]

Gen. et sp. nov

Zhang et al.

Early Jurassic

Lufeng Formation

 China

An early member of Sauropodiformes. The type species is Y. sunae.

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