List of the Paleozoic life of Nevada

This list of the Paleozoic life of Nevada contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Nevada and are between 538.8 and 252.17 million years of age.

A

• †Aatocrinus
  • †Aatocrinus permicus
• †Acaciapora
  • †Acaciapora duncanae – type locality for species
• †Acanthocladia
• †Acanthopecten
  • †Acanthopecten coloradoensis

• 

  Fossil of the Silurian-Middle Devonian trilobite Acanthopyge

  †Acanthopyge
• †Achlysopsis
  • †Achlysopsis hemitora
  • †Achlysopsis liokata
• †Aciculolenus
  • †Aciculolenus peculiaris
• †Acidiphorus
  • †Acidiphorus brevis – or unidentified comparable form
  • †Acidiphorus lineotuberculatus
  • †Acidiphorus pseudobathurus
• †Aclisina
• †Acmarhachis
  • †Acmarhachis acuta
  • †Acmarhachis acutus
  • †Acmarhachis typicalis
• †Acodus
  • †Acodus auritus – or unidentified comparable form
• †Acontiodus
  • †Acontiodus alveolaris
• †Acosarina
  • †Acosarina mesoplatys
• †Acratia
  • †Acratia gassanovae – or unidentified related form
  • †Acratia silincula – or unidentified related form
  • †Acratia subelongata
• †Acrocyathus
• †Acrospirifer
  • †Acrospirifer murchisoni – or unidentified related form
• †Acrothyra
• †Actinostroma
• †Acutichiton
  • †Acutichiton gracilis – type locality for species
  • †Acutichiton nevadensis – type locality for species
• †Adamsoceras
  • †Adamsoceras isabelae
• †Adelograptus
  • †Adelograptus antiquus
• †Aechmina – tentative report
• †Aesopomum
  • †Aesopomum varistriatus – or unidentified comparable form
• †Agathammina
• †Agnostocrinus
  • †Agnostocrinus typus
• †Agnostotes
  • †Agnostotes clavata – or unidentified comparable form
• †Agnostus

• 

  Fossilized shell of the Middle Devonian ammonoid cephalopod, Agoniatites

  †Agoniatites
• †Alaskospira
• †Albertella
  • †Albertella aspinosa
  • †Albertella eiloitys
  • †Albertella fritizi – type locality for species
  • †Albertella fritzi – type locality for species
  • †Albertella highlandensis – type locality for species
  • †Albertella judithi
  • †Albertella lata – type locality for species
  • †Albertella schenki – type locality for species
  • †Albertella spectrensis
• †Albertellina
  • †Albertellina aspinosa
• †Albertelloides – type locality for genus
  • †Albertelloides kitae – type locality for species
  • †Albertelloides kitai – type locality for species
  • †Albertelloides mischi – type locality for species
  • †Albertelloides pandispinata – type locality for species
  • †Albertelloides rectimaginatus
  • †Albertelloides rectimarginatus
• †Allorhynchus
  • †Allorhynchus heteropsis
• †Allorisma – report made of unidentified related form or using admittedly obsolete nomenclature
• †Allosocrinus – tentative report
• †Alokistocare
  • †Alokistocare alta – type locality for species
• †Alokistocarella
  • †Alokistocarella brighamensis – or unidentified comparable form
• †Altiocculus
  • †Altiocculus drumensis
• †Alveolites
• †Amaurotoma
  • †Amaurotoma zappa – type locality for species
• †Ambocoelia
  • †Ambocoelia lobata – tentative report
  • †Ambocoelia recidiva
• †Ambothyris
• †Amecephalites – type locality for genus
  • †Amecephalites sundbergi – type locality for species
• †Amecephalus
  • †Amecephalus arrojosensis
  • †Amecephalus laticaudum
• †Amorphognathus
  • †Amorphognathus ordovicicus
• †Amphilichas
  • †Amphilichas minganensis – or unidentified related form
• †Amphipora
• †Amphiscapha
  • †Amphiscapha intermedius – type locality for species
  • †Amphiscapha proxima
• †Amplexizaphrentis
• †Amplexoides
  • †Amplexoides radicosi – tentative report
• †Amplifallotaspis
  • †Amplifallotaspis keni
• †Ampyx – tentative report
• †Ampyx
• †Ampyxina
• †Ampyxoides
  • †Ampyxoides occipitalis – or unidentified comparable form
• †Anabarella
  • †Anabarella chelata – type locality for species
• †Anabolotreta
  • †Anabolotreta glabra – type locality for species
  • †Anabolotreta mogota – type locality for species
• † Ananias
  • †Ananias nevadensis
  • †Ananias seminudum – type locality for species
• †Anaphilicas – tentative report
• †Anastrophia
  • †Anastrophia magnifica – or unidentified comparable form
• †Anataphrus
  • †Anataphrus martinensis
  • †Anataphrus spurius – or unidentified comparable form
• †Ancillotoechia
  • †Ancillotoechia aptata
  • †Ancillotoechia pahranagatensis
• †Anechocephalus
  • †Anechocephalus spinosus
  • †Anechocephalus trigranulatus
• †Anemonaria
  • †Anemonaria delicatula
• Angulocellularia
• †Angulotreta
• †Anisocyamus
• †Anisopyge
• †Anisotrypa
• †Anisotrypella
• †Anolotichia

• 

  Restorative model of the Cambrian arthropod Anomalocaris

  †Anomalocaris
• †Anomalorthis
  • †Anomalorthis fascicostatus – or unidentified comparable form
  • †Anomalorthis fascicostellatus
  • †Anomalorthis lonensis
  • †Anomalorthis nevadensis
  • †Anomalorthis oklahomensis
  • †Anomalorthis resoi
  • †Anomalorthis utahensis
• †Anomphalus
  • †Anomphalus jaggerius – type locality for species
• †Anoplia
  • †Anoplia elongata
• †Anostylostroma
• †Antagmus
  • †Antagmus arenosus – type locality for species
• †Anthaspidella
  • †Anthaspidella clintoni
• †Anthraconeilo – tentative report
• †Anthracospirifer
  • †Anthracospirifer bifurcatus – or unidentified comparable form
  • †Anthracospirifer birdspringensis
  • †Anthracospirifer curvilateralis
  • †Anthracospirifer newberryi
  • †Anthracospirifer occiduus
  • †Anthracospirifer opimus
  • †Anthracospirifer pellaensis – or unidentified related form
• †Anticostia
  • †Anticostia fastigata
  • †Anticostia fastigiata
  • †Anticostia festigata
  • †Anticostia lata
  • †Anticostia macgregorae
  • †Anticostia tenuissima
  • †Anticostia thorsteinssoni
  • †Anticostia uniformis
• †Antiquatonia
  • †Antiquatonia coloradoensis
  • †Antiquatonia elyensis
  • †Antiquatonia hermosana
  • †Antiquatonia morrowensis
  • †Antiquatonia portlockianus
• †Antirhynchonella
• †Antistrix
  • †Antistrix invicta
• †Apachella
• †Apachia
  • †Apachia butlerensis
• †Aparchites
• †Apatokephalus
  • †Apatokephalus finalis – tentative report
• †Apatolichas
  • †Apatolichas jukesi – or unidentified comparable form
• †Aphelaspis
  • †Aphelaspis brachyphasis – type locality for species
  • †Aphelaspis buttsi
  • †Aphelaspis haguei
  • †Aphelaspis subditus
• †Aphelotoxon
  • †Aphelotoxon acuminata
  • †Aphelotoxon marginata
  • †Aphelotoxon punctata
• †Apheoorthis
• †Aphroidophyllum
  • †Aphroidophyllum inceptor – type locality for species
• †Aploconus
  • †Aploconus lafustei – type locality for species
• †Aporthophyla
  • †Aporthophyla typa
  • †Aporthophyla typica
• †Appendispinograptus
  • †Appendispinograptus leptothecalis
  • †Appendispinograptus longispinus
  • †Appendispinograptus supernus
• †Arceodomus
  • †Arceodomus glabrata
  • †Arceodomus langenheimi
• †Archaediscus
  • †Archaediscus krestovnikovi
  • †Archaediscus moelleri – or unidentified loosely related form

• 

  Fossilized shell and spines of the Late Devonian-Permian sea urchin Archaeocidaris

  †Archaeocidaris
• †Archaeocothurnus
  • †Archaeocothurnus goshutensis – type locality for species
• †Archaeocyathus
  • †Archaeocyathus atlanticus – or unidentified comparable form
• †Archaeophiomusium
  • †Archaeophiomusium bispinosum – type locality for species
  • †Archaeophiomusium burrisi
• †Archaeorthis
  • †Archaeorthis costellatus
  • †Archaeorthis elongata
  • †Archaeorthis elongatus
• †Archaeoscyphia
  • †Archaeoscyphia bassleri – type locality for species
  • †Archaeoscyphia eganensis – type locality for species
  • †Archaeoscyphia pannosa – type locality for species
  • †Archaeoscyphia pulchra
  • †Archaeoscyphia rossi – type locality for species
• †Archaeosycon
  • †Archaeosycon copulatus
• †Archinacella – tentative report
• †Arcochiton
  • †Arcochiton richardsoni – type locality for species
• †Areostrophia
  • †Areostrophia rara
• †Arroyocrinus
  • †Arroyocrinus brachiatus
  • †Arroyocrinus popenoei
• †Arrythmocricus
  • †Arrythmocricus mcdamensis
• †Asaphellus
  • †Asaphellus eudocia – or unidentified comparable form
  • †Asaphellus riojanus
• †Asarcophyllum
  • †Asarcophyllum ramosum
• †Ascopora
• †Asgardaspira
  • †Asgardaspira measuresae
  • †Asgardaspira yochelsoni
• †Asphaltina
• †Aspidagnostus
  • †Aspidagnostus laevis – type locality for species
  • †Aspidagnostus rugosus
• †Astartella
  • †Astartella subquadrata
• †Asthenophyllum
  • †Asthenophyllum orthoseptatum – tentative report
• †Astreptodictya
• †Astroproetus
• †Asymphylotoechia
  • †Asymphylotoechia nolani
• †Atelelasma
  • †Atelelasma primotica
• †Athabaskia
• †Athyridacid
• †Athyris
  • †Athyris angelica
  • †Athyris angelicoidea
  • †Athyris lamellosa
• †Atopocystis – type locality for genus
  • †Atopocystis mucronata – type locality for species
• †Atrypa
  • †Atrypa nevadana
  • †Atrypa parva – or unidentified comparable form
  • †Atrypa reticularis
• †Atrypina
  • †Atrypina erugata
  • †Atrypina rugata
  • †Atrypina simpsoni – type locality for species
• †Atrypoidea
• †Aulacoparia
  • †Aulacoparia venta – or unidentified comparable form
• †Aulocystis
• †Aulopora
• †Auloprotonia
• †Australispongia
  • †Australispongia compressa – type locality for species
• †Australophyllum – tentative report

• 

  Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten

  †Aviculopecten
  • †Aviculopecten affinis
  • †Aviculopecten eurekensis
  • †Aviculopecten haguei
  • †Aviculopecten pintoensis
• †Aviculopinna
  • †Aviculopinna consimilis – or unidentified comparable form
  • †Aviculopinna peracuta – tentative report
• †Avonia
• †Axofistulophyllum
  • †Axofistulophyllum conulus – tentative report
  • †Axofistulophyllum convexum

B

• †Bactroceras
  • †Bactroceras angustisiphonatum
• Bairdia
  • †Bairdia confragosaeformis – or unidentified comparable form
  • †Bairdia fabaeformis – or unidentified comparable form
  • †Bairdia manifesta
• †Bairdiacypris
  • †Bairdiacypris anteroangulosa
  • †Bairdiacypris martinae
  • †Bairdiacypris quarziana
• †Bairdiocypris
• †Bakevellia
• †Ballardina
  • †Ballardina simplex
• †Baltoceras
  • †Baltoceras striatum – type locality for species
• †Basilicus
  • †Basilicus mackeei
  • †Basilicus mckeei
• †Batenevia
• †Bathymyonia
  • †Bathymyonia nevadensis – type locality for species
  • †Bathymyonia type locality for species A – informal

• 

  Illustration of a fossil of the Cambrian trilobite Bathynotus

  †Bathynotus
  • †Bathynotus holopygus
• †Bathyocos
  • †Bathyocos housensis
• †Bathyurellus
  • †Bathyurellus feitleri
• †Bathyuriscus
  • †Bathyuriscus petalus
• †Bathyurus
  • †Bathyurus acutus
  • †Bathyurus extans – or unidentified comparable form
  • †Bathyurus nevadensis
  • †Bathyurus sunbloodensis
• †Batostomellina
• †Beecheria
• †Bekena
• †Bellazona
  • †Bellazona bella
• †Bellefontia

• 

  Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon

  †Bellerophon
  • †Bellerophon deflectus
  • †Bellerophon needlensis – type locality for species
  • †Bellerophon nevadensis
• †Belodella
• †Belodina
  • †Belodina confluens
  • †Belodina disponsa – or unidentified comparable form
  • †Belodina monitorensis
  • †Belodina ornata – or unidentified comparable form
• †Benthamaspis
  • †Benthamaspis sera
• †Bergaueria – tentative report
• †Besselodus
  • †Besselodus borealis
• †Beyrichia
• †Bicarina
  • †Bicarina type locality for species A – informal

• 

  Life restoration of the Cambrian trilobite Biceratops

  †Biceratops – type locality for genus
  • †Biceratops nevadensis – type locality for species
• †Biciragnostus
  • †Biciragnostus viator
• †Bienvillia
  • †Bienvillia papulosa
• †Bifida – tentative report
• †Bighornia
• † Bija
• †Bilobia
• †Bimuria
• †Blastoidocrinus
  • †Blastoidocrinus nevadensis
• †Blosyropsis
• †Blountia
  • †Blountia bristolensis
• †Bohemograptus
  • †Bohemograptus bohemicus
• †Bojothyris
• †Bolbocephalus – tentative report
• †Bolbolenellus
  • †Bolbolenellus brevispinus – type locality for species
• †Bonnia
  • †Bonnia caperata – type locality for species
  • †Bonnia copia – type locality for species
• †Botomaella
• †Boucotspira
  • †Boucotspira antelopensis
• †Boultonia
  • †Boultonia heezeni – type locality for species
• †Brachyprion
  • †Brachyprion geniculata
  • †Brachyprion mirabilis
• †Brachyspirifer
  • †Brachyspirifer pinyonoides – type locality for species
• †Bradyfallotaspis
• †Bradyphyllum
  • †Bradyphyllum gracilium – type locality for species
• †Bransonia
• †Brasilioproductus
  • †Brasilioproductus welleri – or unidentified comparable form
• †Brevibelus
  • †Brevibelus breviformis
• †Breviphrentis
  • †Breviphrentis invaginata
  • †Breviphrentis invaginatus
  • †Breviphrentis johnsoni
  • †Breviphrentis kirki
  • †Breviphrentis magna
• †Briantia
  • †Briantia mulleri
• †Bristolia
  • †Bristolia anteros
  • †Bristolia bristolensis
  • †Bristolia fragilis
• †Broeggeria – tentative report
• †Bromella
  • †Bromella veritas
• †Brongniartella
• †Brunsia
• †Budnaniella
  • †Budnaniella shenandoense – or unidentified comparable form

• 

  Life restoration of the Early Ordovician-Silurian trilobite Bumastus

  †Bumastus
• †Buxtonia
  • †Buxtonia websteri – type locality for species
• †Bynumina
  • †Bynumina globosa
• †Bythicheilus
• Bythocypris

C

• †Caborcella
  • †Caborcella clinolimbata – type locality for species
  • †Caborcella ganosa
  • †Caborcella granosa
  • †Caborcella pseudaulax
  • †Caborcella reducta
• †Cabrieroceras
  • †Cabrieroceras crispiforme – or unidentified related form
• †Calathium
• †Calcispheara
• †Calcitornella
• †Calcivertella
• †Caliendrum – or unidentified related form
• †Calliprotonia
  • †Calliprotonia spinula – type locality for species
• †Calstevenus – type locality for genus
  • †Calstevenus arcturus – type locality for species
• †Calycalyptella
• †Calycocoelia
  • †Calycocoelia murella – type locality for species
  • †Calycocoelia typicalis
• †Calygirtyoceras
  • †Calygirtyoceras arcticum
• †Calymene
• †Calyptaulax
  • †Calyptaulax callirachis – or unidentified comparable form
• †Camarotoechia
  • †Camarotoechia modica – or unidentified comparable form
  • †Camarotoechia pahranagatensis
  • †Camarotoechia vesper
• †Camerella

• 

  Life restoration of the Cambrian arthropod Canadaspis (left)

  †Canadaspis
• †Canadiphyllum
• †Cancelloceras
  • †Cancelloceras elegans – or unidentified comparable form
• †Cancrinella
• †Caninia
  • †Caninia elkoensis – type locality for species
  • †Caninia goldcreekensis – type locality for species
  • †Caninia torquia
• †Caninostrotion
• †Canthylotreta
  • †Canthylotreta crista – type locality for species
• †Cardiomorpha
• †Carinagypa
• †Carinamala
  • †Carinamala longispina – type locality for species
• †Carlinastraea
  • †Carlinastraea halysitoides
• †Carolinites
  • †Carolinites ekphymosus – or unidentified comparable form
  • †Carolinites genacinaca
  • †Carolinites killaryensis – or unidentified comparable form
  • †Carolinites sibiricus
• †Carrickia
• †Cassidirostrum
  • †Cassidirostrum eurekaensis – or unidentified comparable form
  • †Cassidirostrum vexans – type locality for species
• †Catazona – type locality for genus
  • †Catazona rudilirata – type locality for species
• †Catazone
  • †Catazone nevadana – type locality for species
• †Catenipora
• †Catoraphiceras
  • †Catoraphiceras foerstei
• †Cavusgnathus
  • †Cavusgnathus gigantus
  • †Cavusgnathus lautus
  • †Cavusgnathus spathus

• 

  Fossil of the Cambrian trilobite Cedaria

  †Cedaria
  • †Cedaria brevifrons – type locality for species
• †Celonocrinus
  • †Celonocrinus expansus
• †Cenorhynchia
  • †Cenorhynchia type locality for species A – informal
  • †Cenorhynchia type locality for species B – informal
• †Centropleura
• †Ceratocephala – tentative report
• †Ceratoikiscum – tentative report
• †Ceratopea
  • †Ceratopea latiumbilicata – or unidentified comparable form
  • †Ceratopea lemonei
• †Ceraurinella
• †Ceraurinus
  • †Ceraurinus icarus

• 

  Fossil of the Middle-Late Ordovician trilobite Ceraurus

  †Ceraurus
• †Cernuolimbus
  • †Cernuolimbus depressus
  • †Cernuolimbus granulosus
  • †Cernuolimbus laevifrons
  • †Cernuolimbus orygmatos
  • †Cernuolimbus semigranulosus
• †Chaetetes
  • †Chaetetes milleporaceus
• †Chalaroschwagerina
  • †Chalaroschwagerina ampla – type locality for species
  • †Chalaroschwagerina eximia – type locality for species
  • †Chalaroschwagerina formosa – type locality for species
  • †Chalaroschwagerina globularis – type locality for species
  • †Chalaroschwagerina inflata – type locality for species
  • †Chalaroschwagerina solita – type locality for species
  • †Chalaroschwagerina tumentis

• 

  Chancelloria

  †Chancelloria
• †Chancia
  • †Chancia maladensis – tentative report
  • †Chancia venusta
  • †Chancia venuxa – or unidentified comparable form
• †Chanciaopsis
  • †Chanciaopsis heteromorphos
• †Charchaqia
  • †Charchaqia norini
• †Chaulistomella – tentative report
• †Chazydictya
• †Cheilocephalus
  • †Cheilocephalus brachyops
  • †Cheilocephalus brevilobus
  • †Cheilocephalus granulosus
• †Chonetes
  • †Chonetes euampygus
  • †Chonetes logani
• †Choperella
  • †Choperella jeanette
• †Choristites
  • †Choristites orbitus – type locality for species
• †Cibolocrinus
  • †Cibolocrinus typus
• †Cladochonus
  • †Cladochonus nevadensis – type locality for species
  • †Cladochonus shawi – type locality for species

• 

  Fossilized tooth of the shark Cladodus

  †Cladodus
• †Cladopora
• †Clathronema
  • †Clathronema batteni – type locality for species
• †Clathrospira
• †Cleiothyrdina
  • †Cleiothyrdina orbicularis
• †Cleiothyridina
  • †Cleiothyridina angelicoides – or unidentified comparable form
  • †Cleiothyridina ciriacksi
  • †Cleiothyridina deroissyi
  • †Cleiothyridina elegans
  • †Cleiothyridina milleri
  • †Cleiothyridina orbicularis
  • †Cleiothyridina pecosii
  • †Cleiothyridina pecossi – or unidentified comparable form
  • †Cleiothyridina reticulata
  • †Cleiothyridina type locality for species A – informal
  • †Cleiothyridina type locality for species B – informal
• †Clelandia – tentative report
• †Climacammina
  • †Climacammina patula – or unidentified loosely related form
  • †Climacammina prisca – or unidentified loosely related form
• †Climacograptus
  • †Climacograptus caudatus
  • †Climacograptus hastatus
  • †Climacograptus innotatus
  • †Climacograptus phyllophorus – or unidentified comparable form
  • †Climacograptus tridentatus
  • †Climacograptus tubuliferus
• †Climaconus
• †Clinopistha
  • †Clinopistha levis
• †Clisiophyllum
• †Clisospira

• 

  Cloacaspis

  †Cloacaspis
  • †Cloacaspis tesselata
• †Clonopora – tentative report
• †Cnemidactis
  • †Cnemidactis macroadambulacralatas – type locality for species
• †Coelospira
  • †Coelospira concava
  • †Coelospira pseudocamilla – type locality for species
• †Colaptomena
• †Coledium
  • †Coledium therum
• †Coleoloides
  • †Coleoloides inyoensis – type locality for species
• †Colinispongia
  • †Colinispongia regularis – type locality for species
• †Colpites
• †Columnaria
• †Comanchia
  • †Comanchia minus

• 

  Fossilized shell of the Late Devonian-Permian brachiopod Composita

  †Composita
  • †Composita apheles – or unidentified comparable form
  • †Composita gibbosa
  • †Composita mexicana
  • †Composita mira
  • †Composita ovata
  • †Composita parasulcata
  • †Composita subquadrata
  • †Composita subtilita
  • †Composita trilobata
  • †Composita trilobita
  • †Composita trinuclea
• †Compsonema – type locality for genus
  • †Compsonema fragile – type locality for species
• †Conchidium
• †Conchopeltus
• †Conocardium
• †Conotoma
  • †Conotoma aurora
• †Conotreta

• 

  Fossil of the Ordovician bryozoan Constellaria

  †Constellaria
• †Contignatiospongia – type locality for genus
  • †Contignatiospongia nevadensis – type locality for species
• †Conularia
• †Cooleyella
  • †Cooleyella duffini
• †Coosia
  • †Coosia longocula – type locality for species
• †Cordillerastraea
  • †Cordillerastraea complexa
  • †Cordillerastraea nevadaensis – type locality for species
  • †Cordillerastraea nevadensis
• †Cordylodus
  • †Cordylodus angulatus
  • †Cordylodus intermedius
  • †Cordylodus lindstomi
  • †Cordylodus proavus
• †Cornuodus
• Cornuspira
• †Cornwallatia – type locality for genus
  • †Cornwallatia tabularia – type locality for species
• †Cortezorthis
  • †Cortezorthis cortezensis – type locality for species
• †Corydylodus
• †Corynexochides
  • †Corynexochides prolatus
• †Corynexochoides
  • †Corynexochoides prolatus
• †Costatumulus
  • †Costatumulus altissima
• †Costellarina
  • †Costellarina kaasai
  • †Costellarina plasi
• †Costipelagiella
  • †Costipelagiella nevadense – type locality for species
• †Costispirifer
• †Cothurnocysts
  • †Cothurnocysts saukia – type locality for species
• †Cranaena
• †Crassialveolites
  • †Crassialveolites dubatalovi – or unidentified comparable form
• †Crassifimbra
  • †Crassifimbra walcotti
• †Cravenoceras
  • †Cravenoceras friscoense
• †Crenispirifer – tentative report
• †Crimites
  • †Crimites elkoensis – type locality for species
• †Criteriognathus
  • †Criteriognathus eurekaensis
• †Crurithyris
  • †Crurithyris calendae
  • †Crurithyris expansa
  • †Crurithyris fissa – type locality for species
  • †Crurithyris planoconvexa
  • †Crurithyris wampensis
• †Cryptolithoides
  • †Cryptolithoides fittsi
  • †Cryptolithoides reticulatus
• †Cryptolithus
• †Cryptophyllus
• †Ctenalosia
  • †Ctenalosia fixata
• †Ctenodonta
• †Culumbodina
  • †Culumbodina occidentalis
• †Culumbodine
  • †Culumbodine penna
• †Cuparius
  • †Cuparius cardilatus
• †Curtoceras
• †Cyathaxonia
• †Cyathophycus
  • †Cyathophycus pseudoreticulatus – type locality for species
  • †Cyathophycus reticulatus – tentative report
• †Cyathophyllum
  • †Cyathophyllum eurekaense
• †Cybeloides
• †Cybelopsis
• †Cybelurus
  • †Cybelurus halo
• †Cymbidium
• †Cypricardella
  • †Cypricardella connata
  • †Cypricardella striata – or unidentified related form
• †Cypricardinia
  • †Cypricardinia moorefieldana – or unidentified related form
• †Cyptendoceras
  • †Cyptendoceras kirki – type locality for species
  • †Cyptendoceras rhythmicum – type locality for species
• †Cyrtia
• †Cyrtina
  • †Cyrtina caroline
  • †Cyrtina neogenes
  • †Cyrtina varia – or unidentified comparable form
• †Cyrtinaella
  • †Cyrtinaella causa – type locality for species
• †Cyrtinoides
  • †Cyrtinoides septata
• †Cyrtoniodus
  • †Cyrtoniodus flexuosus
• †Cyrtonotella
  • †Cyrtonotella fasciculata – or unidentified related form
• †Cyrtorostra

• 

  Fossilized shells of the Middle-Late Devonian brachiopod Cyrtospirifer

  †Cyrtospirifer
  • †Cyrtospirifer breviposticus
  • †Cyrtospirifer portae – or unidentified comparable form
  • †Cyrtospirifer whitneyi
• †Cyrtothoracoceras
• †Cystiphylloides
• †Cystodictya
• †Cytherellina
  • †Cytherellina obusa

D

• †Dactyletes
• †Dactylogonia
  • †Dactylogonia vespertina
• †Dactylotreta
  • †Dactylotreta elegantula – type locality for species
• †Dalejina

• 

  Fossil of the Late Ordovician-Middle Devonian trilobite Dalmanites

  †Dalmanites
• †Dapsilodus
  • †Dapsilodus obliquicostatus
• †Daraelites
  • †Daraelites leonardensis
• †Davidsonia
  • †Davidsonia antelopensis
• †Deceptrix
• †Dechenella
• †Decoranewsomites
  • †Decoranewsomites angelicus
• †Decoriconus
  • †Decoriconus fragilis
• †Decorospira – type locality for genus
  • †Decorospira rigbyi – type locality for species
• †Delamarella – type locality for genus
  • †Delamarella breispinaspis
  • †Delamarella brevispinaspis – type locality for species
• †Delaria
  • †Delaria sevilloidia
  • †Delaria snowi
• †Dellea – tentative report
  • †Dellea punctata
• †Delmarella – type locality for genus
  • †Delmarella brevispinaspis – type locality for species
• †Delocrinus
  • †Delocrinus graphicus – or unidentified related form
  • †Delocrinus vastus
• †Delthyris
• †Denayella
  • †Denayella housei – type locality for species
• Dentalium
• †Derbyia
  • †Derbyia crassa
  • †Derbyia subcircularis
  • †Derbyia sulca
  • †Derbyia wabaunseensis
• †Desatrypa
  • †Desatrypa copperi
• †Desmoinesia
  • †Desmoinesia ingrata
  • †Desmoinesia nana
• †Desmorthis
  • †Desmorthis costata
  • †Desmorthis crassus
  • †Desmorthis nevadensis
  • †Desmorthis planus
• †Devonalosia – tentative report
• †Devonoproductus
  • †Devonoproductus hallanus
  • †Devonoproductus minimus – or unidentified comparable form
• †Diacanthaspis – tentative report
• †Dianulites
• †Diaphragmaphyllum
  • †Diaphragmaphyllum grossum – or unidentified related form
• †Diaphragmus
  • †Diaphragmus phillipsi
• †Dicanthopyge
  • †Dicanthopyge convergens
  • †Dicanthopyge quadrata
  • †Dicanthopyge reductus
• †Dicellograptus
  • †Dicellograptus alector – type locality for species
  • †Dicellograptus anceps
  • †Dicellograptus complanatus
  • †Dicellograptus divaricatus – or unidentified comparable form
  • †Dicellograptus minor
  • †Dicellograptus mirabilis
  • †Dicellograptus ornatus
  • †Dicellograptus sextans
  • †Dicellograptus tumidus
  • †Dicellograptus turgidus
• †Diceratograptus
  • †Diceratograptus mirus
• †Diceromyonia
  • †Diceromyonia ignota
• †Dichognathus
  • †Dichognathus typica
• †Dichogranthus
• †Dicoelosia
  • †Dicoelosia biloba
• †Dicranograptus
• †Dictyoclostus
• †Dictyonema
• †Dictytonina
  • †Dictytonina pannula

• 

  Fossil of the Middle Ordovician graptolite Didymograptus

  †Didymograptus
  • †Didymograptus artus
  • †Didymograptus protobifidus
• †Dielasma
  • †Dielasma diabloense – or unidentified comparable form
  • †Dielasma phosphoriense
• †Dimegelasma
  • †Dimegelasma eurekensis – type locality for species
• †Dimeropyge – tentative report
• †Dimeropygiella
  • †Dimeropygiella caudanodosa
  • †Dimeropygiella ovata
• †Dimorphoceras
• †Dinorthis
  • †Dinorthis occidentalis
• †Diparelasma
  • †Diparelasma typicum – or unidentified comparable form
• †Diplocyathellus

• 

  Cambrian graptolite Diplograptus

  †Diplograptus
  • †Diplograptus rarithecatus
  • †Diplograptus rigidus
• †Diplotrypa
• †Discomyorthis
  • †Discomyorthis musculosa
• †Disphyllum
• †Distacodus
  • †Distacodus symmetricus
• †Distomodus
• †Divaricospongia – type locality for genus
  • †Divaricospongia dilata – type locality for species
• †Dokimocephalus
  • †Dokimocephalus pernasutus
• †Dolerorthis
  • †Dolerorthis flabellites
• †Donaldiella
  • †Donaldiella cicelia
• †Donaldina
• †Donaldospira
  • †Donaldospira geminocarinata – or unidentified comparable form
• †Dorlodotia
• †Dorytreta – tentative report
• †Drepanodus
  • †Drepanodus subarcuatus
• †Drepanoistodus
  • †Drepanoistodus deltife
  • †Drepanoistodus suberectus
• †Droharhynchia
  • †Droharhynchia intermissa
• †Dunbarella
• †Dunderbergia
  • †Dunderbergia anyta
  • †Dunderbergia bigranulosa
  • †Dunderbergia brevispina
  • †Dunderbergia calculosa
  • †Dunderbergia nitida
  • †Dunderbergia polybothra
  • †Dunderbergia variagranula
• †Durhamina
  • †Durhamina cordillerensis – type locality for species
  • †Durhamina moormanensis – type locality for species
  • †Durhamina primitiva – type locality for species
  • †Durhamina richi
  • †Durhamina snyderi – type locality for species
  • †Durhamina sublaeve
• †Dvorakia
• †Dyoros
  • †Dyoros nevadaensis – type locality for species
  • †Dyoros type locality for species A – informal
• †Dyscritella
  • †Dyscritella acanthostylia – type locality for species
• †Dyticospirifer – type locality for genus
  • †Dyticospirifer mccolleyensis – type locality for species
• †Dytremacephalus
  • †Dytremacephalus asperaxis
  • †Dytremacephalus granulosus

E

• †Earlandia
  • †Earlandia vulgaris
• †Ecculiomphalus
  • †Ecculiomphalus harrisae
• †Eccyliopterus
• Echidnina
  • †Echidnina bengstoni – type locality for species
• †Echinalosia
  • †Echinalosia type locality for species A – informal
• †Echinaria
  • †Echinaria knighti
  • †Echinaria semipunctata – or unidentified comparable form
• †Echinauris
  • †Echinauris magna
  • †Echinauris subhorrida – type locality for species
• †Echinocoelia
  • †Echinocoelia careocamera
  • †Echinocoelia denayensis
  • †Echinocoelia williamsi
• †Echinoconchus
  • †Echinoconchus biseriatus – or unidentified related form
  • †Echinoconchus elegans
  • †Echinoconchus semipunctatus
  • †Echinoconchus vittatus – or unidentified related form
• †Ecnomiophyllum – type locality for genus
  • †Ecnomiophyllum fascis – type locality for species
  • †Ecnomiophyllum merriami – type locality for species
  • †Ecnomiophyllum simpsoni
• †Ectenonotus
  • †Ectenonotus westoni – or unidentified comparable form
  • †Ectenonotus whittingtoni
  • †Ectenonotus whittingtonia
• †Ectenotus – tentative report
• †Ectoprimitia
• †Edmondia
• †Egania – type locality for genus
  • †Egania typicalis – type locality for species
• †Egorovia
  • †Egorovia longituda – or unidentified related form
• †Egosiella – tentative report
• †Ehmaniella
  • †Ehmaniella angustigena
  • †Ehmaniella fronsplanata
• †Ekeraspis
  • †Ekeraspis floweri
  • †Ekeraspis nevadensis
• †Ekteinocrinus
  • †Ekteinocrinus battleshipensis
• †Ekvasophyllum
• †Elassocrinus
  • †Elassocrinus cyathus
  • †Elassocrinus delicatulus
  • †Elassocrinus inornatus
  • †Elassocrinus nodosus
• †Elburgia
  • †Elburgia granulosa
  • †Elburgia quinnensis
• †Eleutherokomma
  • †Eleutherokomma impennis – or unidentified comparable form
• †Eleutherospira
  • †Eleutherospira sinistralis – type locality for species
• †Elibatocrinus
  • †Elibatocrinus elongatus
• †Eliorhynchus
  • †Eliorhynchus castanea
  • †Eliorhynchus nevadensis
• †Elita
• †Elkoceras – type locality for genus
  • †Elkoceras volborthi – type locality for species
• †Elliottella
  • †Elliottella multicostata – or unidentified related form
• †Elrathina
  • †Elrathina antiqua
  • †Elrathina wheelera
• †Elvania
• †Elvinia
  • †Elvinia roemeri
• †Elviniella
  • †Elviniella laevis
• †Elythyna
• †Emanuella
  • †Emanuella meristoides
• †Embolophyllum
  • †Embolophyllum carbonense – type locality for species
• †Emmonsia
• †Enantiosphenella
  • †Enantiosphenella cybele
• †Encrinuroides

• 

  Fossil of the Middle Ordovician-Early Devonian trilobite Encrinurus

  †Encrinurus
• †Endelocrinus
  • †Endelocrinus torus
• †Endophyllum
• †Endothyra
  • †Endothyra bowmani – or unidentified related form
  • †Endothyra excellens
  • †Endothyra maxima
  • †Endothyra pandorae
  • †Endothyra phrissa
  • †Endothyra prisca – or unidentified loosely related form
  • †Endothyra tantala
• †Endothyranella
• †Endothyranopsis
  • †Endothyranopsis compressus
  • †Endothyranopsis crassus
  • †Endothyranopsis scitula
• †Endymionia
  • †Endymionia meeki – or unidentified comparable form
• †Entactinia
  • †Entactinia spongia – tentative report
  • †Entactinia sublata – or unidentified related form
• †Enteletes
• †Entogonites
• †Eoangyomphalus
  • †Eoangyomphalus klapperi – type locality for species
• †Eochonetes
• †Eoendothyrandopsis
• †Eoendothyranopsis
  • †Eoendothyranopsis donica
  • †Eoendothyranopsis ermakiensis
  • †Eoendothyranopsis robusta – or unidentified related form
  • †Eoendothyranopsis scitula
• †Eofallotaspis – or unidentified comparable form
• †Eofalodus
  • †Eofalodus brevis
• †Eofletcheria
• †Eoglossinotoechia
• †Eokochaspis – type locality for genus
  • †Eokochaspis cabinensis
  • †Eokochaspis delamarensis
  • †Eokochaspis granulosa – type locality for species
  • †Eokochaspis longspina
  • †Eokochaspis metalaspis – type locality for species
  • †Eokochaspis nodosa – type locality for species
  • †Eokochaspis piochensis
• †Eoleperditia
  • †Eoleperditia bivia
• †Eolissochonetes
  • †Eolissochonetes keyesi
• †Eomarginifera
  • †Eomarginifera haydensis – or unidentified comparable form
• †Eoparafusulina
  • †Eoparafusulina bellula – type locality for species
  • †Eoparafusulina concisa – type locality for species
  • †Eoparafusulina spissa
• †Eoplectodona
• †Eoplectodonta
  • †Eoplectodonta alternata
• †Eopteria
  • †Eopteria richardsoni – or unidentified comparable form
• †Eoptychoparia – or unidentified comparable form
  • †Eoptychoparia piochensis
• †Eorobergia
• †Eoschubertella
• †Eoschuchertella
• †Eospirifer
• †Eostaffella
  • †Eostaffella tortula
• †Eotetragraptus
• †Eothele
  • †Eothele spurri
• †Eotuberitina
• †Epiphyton
  • †Epiphyton pencillatum – or unidentified comparable form
• †Epistacheoides
• †Eridoconcha
• †Eridopora
• †Eriella – tentative report
• †Erisocrinus
  • †Erisocrinus longwelli
• †Erixanium
  • †Erixanium brachyaxis
  • †Erixanium carinatum
  • †Erixanium multisegmentus
• †Eroicaspira
  • †Eroicaspira simulatrix
• †Esmeraldina
  • †Esmeraldina cometes – type locality for species
  • †Esmeraldina elliptica
  • †Esmeraldina lidensis – type locality for species
  • †Esmeraldina rowei
• †Ethmophyllum
• †Euconia – tentative report
• †Eugonophyllum
• †Eukrinaster
  • †Eukrinaster ibexensis
• †Eumetria
  • †Eumetria acutirostra – or unidentified comparable form
• †Eumorphoceras
  • †Eumorphoceras bisulcatum

• 

  Fossilized shell of the Silurian-Permian sea snail Euomphalus

  †Euomphalus
  • †Euomphalus latus
  • †Euomphalus pancakensis – type locality for species
• †Euphemites
  • †Euphemites crenulatus
  • †Euphemites kingi
  • †Euphemites nevadensis – type locality for species
• †Euphemitopsis
  • †Euphemitopsis subpapillosa
• †Euptychaspis
• †Eurekablastus – type locality for genus
  • †Eurekablastus ninemilensis – type locality for species
• †Eurekaspirifer – type locality for genus
  • †Eurekaspirifer pinyonensis
• †Eurekia
• †Eurychilina
• †Euryzone – tentative report
• †Eustypocystis
  • †Eustypocystis minor
• †Evanescirostrum
  • †Evanescirostrum glabraventra
• †Exochops
  • †Exochops portlocki
• †Exocrinus
  • †Exocrinus moorei

F

• †Faberophyllum
• †Fallotaspidia

• 

  Illustration of a fossil of the Cambrian trilobite Fallotaspis

  †Fallotaspis
  • †Fallotaspis bondoni – or unidentified comparable form
• †Favosites
• †Fenestella
  • †Fenestella stocktenensis
• †Fenestrellina
• †Fenestrocyathus
• †Ferganella
  • †Ferganella borealis
• †Fieldaspis
  • †Fieldaspis bilobata
  • †Fieldaspis celer
  • †Fieldaspis superba
• †Fimbrinia
  • †Fimbrinia plummeri
• †Finkelnburgia – tentative report
  • †Finkelnburgia scenidioides – or unidentified comparable form
• †Fistellaspongia – type locality for genus
  • †Fistellaspongia inclinata – type locality for species
• †Fistulipora
  • †Fistulipora bifoliatus
• †Fistutlipora
  • †Fistutlipora lamellatis
• †Flabellitesia
  • †Flabellitesia flabellites
• †Flexaria
  • †Flexaria arkansana

• 

  Front (left) and right side (right) views of an enrolled fossil of the Middle Ordovician-Silurian trilobite Flexicalymene

  †Flexicalymene
• †Fomichevella
  • †Fomichevella nevadensis – type locality for species
  • †Fomichevella schrenki
  • †Fomichevella waltersi – type locality for species
• †Fremontia
• †Freontia
• †Fritzaspis
  • †Fritzaspis generalis
  • †Fritzaspis ovalis
• †Fusulinella
  • †Fusulinella acuminata
  • †Fusulinella fugax

G

• †Gabelia – type locality for genus
  • †Gabelia fascicula
  • †Gabelia giganta
  • †Gabelia intermedia – type locality for species
  • †Gabelia pedunculus – type locality for species
• †Gacella – tentative report
• †Gallatinospongia
  • †Gallatinospongia conica
• †Gamachignathus
  • †Gamachignathus ensifer
• †Gasterocoma
  • †Gasterocoma bicaula – type locality for species
• †Gattendorfia – tentative report
• †Genalaticurus
  • †Genalaticurus genalatus – or unidentified comparable form
• †Gennaeocrinus
  • †Gennaeocrinus maxwelli – type locality for species

• 

  Fossil of the Early-Late Ordovician trilobite Geragnostus

  †Geragnostus
• †Geraldinella
• †Geranocephalus
  • †Geranocephalus truncatus
• †Girtyana
  • †Girtyana stellara – type locality for species
• †Girtyoceras
  • †Girtyoceras hamiltonense – type locality for species
• †Girtypecten
• †Girvanella
• †Glabrocingulum
  • †Glabrocingulum quadrigatum
• †Glaphurochiton – tentative report
• †Glaphurus
• †Glaphyraspis
  • †Glaphyraspis ornata
• †Glassia
  • †Glassia triangulata
• †Globivalvulina – tentative report
• †Globoendothyra
  • †Globoendothyra tomiliensis – or unidentified related form
• Glomospira
• †Glossopleura
  • †Glossopleura lodensis
  • †Glossopleura tuta
  • †Glossopleura walcotti
• †Glyphaspis
  • †Glyphaspis concavus
• †Glyptagnostus

  • 

    Fossil of the Cambrian trilobite Glyptagnostus

    †Glyptagnostus reticulatus
• †Glyptograptus
• †Glyptomena – tentative report
• †Glyptorthis
• †Glyptospira
  • †Glyptospira arelela – type locality for species
• †Gnathodus
  • †Gnathodus muricatus
  • †Gnathodus simplex – or unidentified related form
• †Gogia
  • †Gogia longidactylus
• †Goldfieldia – type locality for genus
  • †Goldfieldia pacifica – type locality for species
• †Goniasma

• 

  Fossilized shell of the Late Devonian-Late Triassic ammonoid cephalopod Goniatites

  †Goniatites
  • †Goniatites americanus
  • †Goniatites deceptus
  • †Goniatites eganensis – type locality for species
  • †Goniatites sowerbyi – type locality for species
• †Goniophrys – tentative report
• †Goniotelina
  • †Goniotelina ensifer
• †Goniotrypa
• †Gosseletina – tentative report
• †Grabaulites
  • †Grabaulites jacksoni – or unidentified comparable form
• †Gracianella
• †Grammatodon
  • †Grammatodon politus
• †Grandaurispina – or unidentified comparable form
  • †Grandaurispina type locality for species A – informal
• †Grandinasus
  • †Grandinasus argentus
  • †Grandinasus auricampus
  • †Grandinasus patulus
• †Granulifera
  • †Granulifera granulosa
• †Graphiocrinus
  • †Graphiocrinus scopulus
• †Graphiodactyllis
• †Groomodiscus – type locality for genus
  • †Groomodiscus rossi – type locality for species
• †Grovesella
  • †Grovesella nevadensis – type locality for species
  • †Grovesella tabasensis
• †Gryphochiton
  • †Gryphochiton distinctus – type locality for species
• †Grypophyllum
• †Gypidula
  • †Gypidula loweryi
  • †Gypidula praeloweryi – type locality for species
  • †Gypidula pseudogaleata – or unidentified comparable form
• †Gypidulina
  • †Gypidulina Sp. C – informal

• 

  Fossilized shell of the Carboniferous-Permian brachiopod Gypospirifer

  †Gypospirifer
  • †Gypospirifer infraplicus – or unidentified comparable form

H

• †Hadrocephalites
  • †Hadrocephalites lyndonensis
  • †Hadrocephalites rhytidodes
• †Hadropipetta
  • †Hadropipetta nevadensis – type locality for species
• †Hadrorhynchia
  • †Hadrorhynchia sandersoni
• †Hadrotreta
  • †Hadrotreta primaaea

• 

  Fossil of the Ordovician-Silurian tabulate coral Halysites

  †Halysites
• †Hamarodus
  • †Hamarodus europaeus
• †Hammatospira – type locality for genus
  • †Hammatospira bellula – type locality for species
• †Hammatostroma
• †Haplistion
  • †Haplistion aeluroglossa
  • †Haplistion sphaericum – or unidentified comparable form
• †Hapsiphyllum
• †Hardyoides
  • †Hardyoides mimicus
• †Harklessia – type locality for genus
  • †Harklessia yuenglingensis – type locality for species
• †Harpillaenus
  • †Harpillaenus rossi – type locality for species
• †Hebetoechia
• †Heckethornia
  • †Heckethornia bowiei
  • †Heckethornia hyndeae – type locality for species
  • †Heckethornia morrisseyi
  • †Heckethornia numani – type locality for species
• †Hedeina
• †Hedinaspis
  • †Hedinaspis regalis
• †Hedraites – tentative report
• †Heintzella
  • †Heintzella davydovi – type locality for species
  • †Heintzella playfordi – type locality for species
  • †Heintzella radiata – or unidentified comparable form
  • †Heintzella whitneyi

• 

  Life restoration of the Permian Chimaera relative Helicoprion

  †Helicoprion
  • †Helicoprion bessonowi
• †Helicotis – tentative report
• †Helicotoma
• †Heliomera
  • †Heliomera albata – or unidentified comparable form
• †Helminthochiton
• †Hemiarges – tentative report
• †Hemiptychina
  • †Hemiptychina quadricostata
• †Heritschiella
  • †Heritschiella girtyi
• †Hermatostroma
• †Hesperinia
  • †Hesperinia kirki – type locality for species
• †Hesperocoelia
  • †Hesperocoelia typicalis
• †Hesperomena
  • †Hesperomena leptellinoidea
• †Hesperonomia
  • †Hesperonomia antelopensis
  • †Hesperonomia crassa – or unidentified comparable form
  • †Hesperonomia iones
  • †Hesperonomia nemea – or unidentified comparable form
  • †Hesperonomia planidorsalis – or unidentified comparable form
• †Hesperonomiella
  • †Hesperonomiella minor
• †Hesperorthis
  • †Hesperorthis antelopensis – or unidentified comparable form
  • †Hesperorthis matutina – or unidentified comparable form
• †Heteralosia
  • †Heteralosia slocomi
• †Heterelasma
  • †Heterelasma type locality for species A – informal
• †Heterocaninia – tentative report
  • †Heterocaninia langenheimi
• †Heteropecten
  • †Heteropecten vanvleeti
• †Heterophrentis
• †Hexatractiella
  • †Hexatractiella nevadensis
• †Highgatella
  • †Highgatella cordilleri
• †Hillyardina – tentative report
• †Hinganella
  • †Hinganella felderi – type locality for species
• †Hintzeia
  • †Hintzeia celsaora
• †Hiscobeccus
  • †Hiscobeccus capax
  • †Hiscobeccus gigas
• †Holcocystis
  • †Holcocystis flexa
• †Holmiella
  • †Holmiella falx
  • †Holmiella millerensis
• †Homagnostus
  • †Homagnostus comptus – type locality for species
  • †Homagnostus lumidosus
  • †Homagnostus obesus
• †Homograptus
• †Homotelus
• †Homotrypa
• †Housia
  • †Housia ovata
• †Howellella
  • †Howellella cycloptera
  • †Howellella textilis – or unidentified comparable form
• †Hunnebergia – tentative report
• †Hustedia
  • †Hustedia culcitula
  • †Hustedia elongata
  • †Hustedia gibbosa
  • †Hustedia miseri
  • †Hustedia mormoni – or unidentified comparable form
  • †Hustedia rotundi
  • †Hustedia stataria
• †Hyalostelia
• †Hyolithellus
  • †Hyolithellus insolitus
• †Hyolithes
• †Hyperchilarina
• †Hypermecaspis
  • †Hypermecaspis kolouros
• †Hypochilarina – tentative report

• 

  Life restoration of the Middle Ordovician trilobite Hypodicranotus

  †Hypodicranotus
• †Hypothyridina
• †Hypselentoma – tentative report
• †Hypsiptycha
  • †Hypsiptycha anticostiensis – or unidentified comparable form
• †Hysterolites
• †Hystriculina
  • †Hystriculina hystricula
  • †Hystriculina type locality for species A – informal
  • †Hystriculina wabashensis
• †Hystricurus
  • †Hystricurus oculilunatus – or unidentified comparable form

I

• †Ianthinopsis
• †Iapetognathus
  • †Iapetognathus sprakersi
• †Ichodella
• †Icriodus
  • †Icriodus angustus – or unidentified comparable form
  • †Icriodus brevis
  • †Icriodus difficilis
  • †Icriodus hesperius
  • †Icriodus latericrescens
  • †Icriodus nevadensis
  • †Icriodus norfordi
  • †Icriodus trojani
• †Iddingsia
  • †Iddingsia robusta
  • †Iddingsia similis
• †Idiomesus
• †Idiostroma
• †Idiostrophia
  • †Idiostrophia conciliata
  • †Idiostrophia lenticularis – type locality for species
  • †Idiostrophia nuda
  • †Idiostrophia paucicostata – or unidentified comparable form
  • †Idiostrophia valdari – type locality for species

• 

  Fossil of the Middle Ordovician trilobite Illaenus

  †Illaenus
  • †Illaenus alveatus – or unidentified comparable form
  • †Illaenus auriculatus
  • †Illaenus fraternus – or unidentified comparable form
  • †Illaenus oscitatus – tentative report
  • †Illaenus utahensis
• †Ilmenia
• †Imitoceras
• †Indivisia – tentative report
• †Inflatia
• †Ingria
  • †Ingria cloudi
• †Innitagnostus
  • †Innitagnostus inexpectans
• †Intomodesma – tentative report
• †Invertrypa
  • †Invertrypa subnuba
  • †Invertrypa talis – type locality for species
• †Iridistrophia
• †Irvingella
  • †Irvingella angustilimbatus
  • †Irvingella flohri
  • †Irvingella major
  • †Irvingella transversa
• †Isbergia
• †Ischyrophyma – tentative report
• †Ischyrotoma
  • †Ischyrotoma juabensis
  • †Ischyrotoma stubblefieldi
• †Isochilina
• †Isograptus
• †Isophragma – tentative report
• †Isorthis
• †Isoteloides

• 

  Fossil of the Middle-Late Ordovician giant trilobite Isotelus.

  †Isotelus
  • †Isotelus copenhagenensis
  • †Isotelus spurius
• †Ivanovia

J

• †Jedria
• †Jeffersonia
• †Jefina
• †Johnsonetes – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Johnsonetes filistriata
• †Juresania
  • †Juresania ovalis – or unidentified comparable form
  • †Juresania rectangularis – or unidentified comparable form

K

• †Kainella
  • †Kainella flagricauda
• †Kalimnasphaera
  • †Kalimnasphaera maculosa – or unidentified related form
• †Kallimorphocrinus
  • †Kallimorphocrinus eaglei
• †Kanoshia
  • †Kanoshia reticulata
• †Kaskia
• †Katuniella – tentative report
• †Kawina
  • †Kawina wilsoni – type locality for species
• †Kazakhoceras
  • †Kazakhoceras bylundi
• †Keriocyathus – type locality for genus
  • †Keriocyathus arachnaius – type locality for species
• †Kindbladia
  • †Kindbladia affinis
• †Kingopora
  • †Kingopora ehrenbergi – or unidentified comparable form
  • †Kingopora inflata – type locality for species
  • †Kingopora wardlawiensa – type locality for species
• †Kistocare
  • †Kistocare campbellensis – type locality for species
• †Kitikamispira
  • †Kitikamispira minuitinodosa
• †Kleopatrina
  • †Kleopatrina arcturusensis – type locality for species
  • †Kleopatrina ftatateeta
  • †Kleopatrina grandis
  • †Kleopatrina magnifica
  • †Kleopatrina simplex
• †Kloedenellitina – tentative report
• †Knightina
• †Knoxiella – tentative report
• †Kochaspis
  • †Kochaspis augusta
  • †Kochaspis liliana
• †Kochiella
  • †Kochiella augusta
  • †Kochiella brevaspis
  • †Kochiella maxeyi
• †Kochiellina
  • †Kochiellina groomensis
  • †Kochiellina janglensis
• †Kochina
  • †Kochina walcotti – type locality for species
• †Kochiproductus
• †Komaspidella
  • †Komaspidella occidentalis – type locality for species
• †Kometia – tentative report
• †Komia
  • †Komia eganensis
• †Komiella
  • †Komiella magnasulca
• †Koneprusia
• †Konickophyllum
• †Koninckophyllum

• 

  Fossil of the Cambrian trilobite Kootenia

  †Kootenia
  • †Kootenia acicularis
  • †Kootenia aculacauda – type locality for species
  • †Kootenia brevispina
  • †Kootenia convoluta
  • †Kootenia crassa
  • †Kootenia crassinucha – type locality for species
  • †Kootenia dawsoni
  • †Kootenia germana
• †Kormagnostella
  • †Kormagnostella advena
• †Kozlowskia
  • †Kozlowskia haydenensis
  • †Kozlowskia kingi
  • †Kozlowskia splendens
• †Kozlowskiellina
• †Kozlowwkiella
  • †Kozlowwkiella lazarei
• †Krausella
• †Krotovia
  • †Krotovia globosa – or unidentified related form
  • †Krotovia knighti
• †Kutorginella
  • †Kutorginella lasallensis
  • †Kutorginella pseudantiquatonia – type locality for species
• †Kuvelousia
  • †Kuvelousia leptosa
• †Kyrshabaktella

L

• †Labiostria
  • †Labiostria westropi
• †Lachnostoma
  • †Lachnostoma latucelsum
• †Ladatheca
  • †Ladatheca cylindrica
• †Ladjia
  • †Ladjia cordillera – type locality for species
  • †Ladjia russelli
  • †Ladjia saltica – or unidentified comparable form
• †Ladogioides
  • †Ladogioides pax – or unidentified comparable form
• †Laeogyra – or unidentified comparable form
• †Lamellospira
• †Landercyathus – type locality for genus
  • †Landercyathus lewandowskii – type locality for species
• †Laticrura
  • †Laticrura heteropleura – or unidentified comparable form
• †Latiendothyra
• †Laurentoscandodus
  • †Laurentoscandodus triangularis
• †Lebobienvillia
• †Leeites
  • †Leeites leei – type locality for species
• †Lehua
  • †Lehua argus – or unidentified related form
• †Leiorhynchus
  • †Leiorhynchus carboniferum
  • †Leiorhynchus hippocastanea
  • †Leiorhynchus miriam
  • †Leiorhynchus nevadensis – or unidentified comparable form
  • †Leiorhynchus rhabdotum – or unidentified comparable form
• †Leiostegium
  • †Leiostegium goodwinensis
• †Leiostrototropis – tentative report
• †Lensotreta – type locality for genus
  • †Lensotreta perplexa – type locality for species
• †Leonardoceras
  • †Leonardoceras parvum

• 

  Fossil of the Late Ordovician-Middle Devonian trilobite Leonaspis

  †Leonaspis
• †Leperditella
  • †Leperditella incisa – or unidentified comparable form
  • †Leperditella tumida – or unidentified comparable form
  • †Leperditella valida
• †Lepetopsis
  • †Lepetopsis franae – type locality for species
• †Lepidocyclus
• †Lepidoleptaena
• †Leptaena
  • †Leptaena acuticuspidata – or unidentified comparable form
  • †Leptaena ordovicica – or unidentified comparable form
• †Leptaenisca
• †Leptathyris
  • †Leptathyris circula
  • †Leptathyris index
  • †Leptathyris obsolescens
• †Leptella
  • †Leptella austrina – type locality for species
  • †Leptella nevadensis
• †Leptellina
  • †Leptellina occidentalis
• †Leptobolus – tentative report
• †Leptocoelia
  • †Leptocoelia murphyi – type locality for species
• †Leptocoelina
  • †Leptocoelina squamosa – type locality for species
• †Leptodesma
• †Leptomphalus
  • †Leptomphalus arcturus – type locality for species
• †Leptostrophia
  • †Leptostrophia beckii – or unidentified comparable form
  • †Leptostrophia inequicostella
• †Lesueurilla
• †Leurosina
  • †Leurosina sinesulca
• †Levenea
  • †Levenea fagerholmi – type locality for species
  • †Levenea navicula – type locality for species
• †Lichenaria
• †Licnocephala
  • †Licnocephala cavigladius
• †Lidaconus – type locality for genus
  • †Lidaconus palmettoensis – type locality for species
• †Limipecten
• †Lingula
  • †Lingula carbonaria – or unidentified comparable form

• 

  Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella

  †Lingulella
• †Linipalus
  • †Linipalus magnispinus – or unidentified related form
• †Linnarssonella
• †Linnarssonia
• †Linoproductus
  • †Linoproductus ovata
  • †Linoproductus planiventralis
  • †Linoproductus prattenianus
  • †Linoproductus prottenianus
• †Liocheina
• †Liricamera
  • †Liricamera nevadensis
• †Lissatrypa – tentative report
• †Lissochonetes
• †Lissocoelia
  • †Lissocoelia cylindrica – type locality for species
  • †Lissocoelia ramosa
• †Listroa
  • †Listroa toxoura
• †Lithostrotionella
  • †Lithostrotionella castelnaui
• †Litocephalus
  • †Litocephalus bilobatus
  • †Litocephalus granulomarginatus
  • †Litocephalus magnus
  • †Litocephalus verruculapeza
• †Lobocorallium
  • †Lobocorallium trilobatum
• †Lobosiphon
• †Lodanaria – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Lodanaria floryi
• †Loganograptus
• †Lomatopisthia – tentative report

• 

  Fossil of the Ordovician trilobite Lonchodomas

  †Lonchodomas
• †Lophonema
  • †Lophonema frydai
• †Lophophyllum – tentative report
• †Lophospira
  • †Lophospira perangulata
• †Lotagnostus
  • †Lotagnostus trisectus – or unidentified comparable form
• †Loxonema
  • †Loxonema walcotti – type locality for species
• †Lunulazona
• †Lutulentus
  • †Lutulentus muralspineus
• †Lyrielasma
• †Lytvophyllum – tentative report

M

• †Macannaia
  • †Macannaia maladensis
• †Macgeea
• †Machaeraria
• †Mackenziecyathus
  • †Mackenziecyathus bukryi
• †Macluritella – tentative report
  • †Macluritella gyroceras – or unidentified comparable form
• †Maclurites
  • †Maclurites magnus
• †Macrocyproides
• †Madaraspis
  • †Madaraspis magnifica
• †Malayaspira
  • †Malayaspira annulata
  • †Malayaspira hintzei
• †Mametella
• †Manzanella
• †Marginia
  • †Marginia ivanovae – or unidentified comparable form
• †Marginovatia
  • †Marginovatia catinulus
  • †Marginovatia eurekensis
• †Martinia
• †Martiniopsis – tentative report
• †Mauryella
• †Mccloudius
  • †Mccloudius parvus – type locality for species
• †Mclearnites
  • †Mclearnites invasor
• †Meekella
  • †Meekella attenuata
  • †Meekella striatocostata
• †Meekopinna
  • †Meekopinna sagitta
• †Meekopora
• †Meekospira
• †Megakozlowskiella
  • †Megakozlowskiella magnapleura – type locality for species
  • †Megakozlowskiella raricosta – or unidentified comparable form
• †Megalaspidella – tentative report
• †Megalaspides
• †Megastrophia
  • †Megastrophia iddingsi
  • †Megastrophia transitans

• 

  Fossil of the Cambrian-Silurian trilobite Megistaspis

  †Megistaspis
• †Meristella
  • †Meristella robertsensis
• †Meristina
• †Merriamites
  • †Merriamites eurekae
• †Mesodouvillina
  • †Mesodouvillina varistriata – or unidentified comparable form
• †Mesolobus
• †Mesopholidostrophia – tentative report
• †Mesoschubertella
  • †Mesoschubertella mullerriedi
• †Mesotrypa
• †Metabolograptus
  • †Metabolograptus persculptus

• 

  Fossilized shell of the Carboniferous-Permian nautiloid cephalopod Metacoceras

  †Metacoceras
• †Metadimorphoceras
  • †Metadimorphoceras richardsi – type locality for species
• †Metaldetes
• †Metaplasia
  • †Metaplasia paucicostata – or unidentified comparable form
• †Metrionaxon
• †Mexicaspis
  • †Mexicaspis difuntosensis
• †Mexicella
  • †Mexicella antelopea
  • †Mexicella grandoculus – tentative report
  • †Mexicella granulata – type locality for species
  • †Mexicella mexicana
  • †Mexicella robusta
  • †Mexicella stator
• †Michelinia
  • †Michelinia meekana
• †Michelinoceras
  • †Michelinoceras wilsoni
• †Microcardinalia
• †Microcheinella
  • †Microcheinella peculiaris – or unidentified comparable form
• †Microdoma
• †Micromitra
• †Microplasma
• †Microryctocara
  • †Microryctocara nevadensis
• †Milleratia – tentative report
• †Millerella
  • †Millerella marblensis
• †Mimatrypa
• †Mimospira
  • †Mimospira helmhackeri – or unidentified related form
• †Minervaecystis – tentative report
• †Minupeltis
  • †Minupeltis conservator
• †Minycardita – type locality for genus
  • †Minycardita sectilis – type locality for species
• †Missisquoia
• †Mizzia
  • †Mizzia yabei – or unidentified comparable form
• †Moapacrinus
  • †Moapacrinus inornatus
  • †Moapacrinus rotundatus

†Modiolus

• • †Modiolus nevadensis
• †Modiomorpha – tentative report
  • †Modiomorpha pintoensis
• †Molybdocyathus – type locality for genus
  • †Molybdocyathus juvenilis – type locality for species
• †Monocraterion

• 

  Fossils of the Early Devonian graptolite Monograptus

  †Monograptus
  • †Monograptus angustidens
  • †Monograptus birchensis
  • †Monograptus hercynicus
  • †Monograptus thomasi
  • †Monograptus uniformis
  • †Monograptus yukonensis
• †Mononusphaericorhynchus
  • †Mononusphaericorhynchus sartenaeri
• †Monotiopleura
• †Montezumaspis
  • †Montezumaspis cometes
  • †Montezumaspis parallela
• †Monticuliporella
• †Moorefieldella
  • †Moorefieldella eurekensis
• †Mooreoceras
• †Morinorhynchus
• †Morosa
  • †Morosa brevispina
  • †Morosa definita
  • †Morosa extensa
  • †Morosa longispina
• †Morozoviella – type locality for genus
  • †Morozoviella curriensis – type locality for species
  • †Morozoviella praecurriensis – type locality for species
• †Moscovicrinus
  • †Moscovicrinus bipinnatus
• †Mourlonia
  • †Mourlonia type locality for species A – informal
• †Mucophyllum
  • †Mucophyllum oliveri
• †Multicostella
• †Multioistodus
• †Multithecopora
  • †Multithecopora hypatiae
• †Murchisonia
  • †Murchisonia megathanae – type locality for species
  • †Murchisonia tillesae – type locality for species
• †Mutationella – tentative report
• †Myalina
• †Mytilarca

N

• †Nadiastrophia
• †Nanicella
• †Nanillaenus
• †Nankinella
• †Nanorthis
  • †Nanorthis hamburgensis
• †Nardophyllum

• 

  Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis

  †Naticopsis
  • †Naticopsis glomerosa – type locality for species
  • †Naticopsis inornata
  • †Naticopsis kaibabensis
• †Neaxon
• †Neilsonia
  • †Neilsonia welleri – or unidentified comparable form
• †Nemesa
  • †Nemesa cimex – type locality for species
• †Neoarchaediscus
• †Neochonetes
  • †Neochonetes acanthoporus
  • †Neochonetes dominus
  • †Neochonetes granulifer
• †Neoeridotrypella
  • †Neoeridotrypella schilti – type locality for species
• †Neomphyma
  • †Neomphyma karpinskiense
  • †Neomphyma nevadense
• †Neomultithecopora
  • †Neomultithecopora mccutcheonae – type locality for species
• †Neopanderodus

• 

  Fossilized shell of the Carboniferous-Permian brachiopod Neospirifer

  †Neospirifer
  • †Neospirifer cameratus
  • †Neospirifer dunbari
  • †Neospirifer gorei
  • †Neospirifer goreii
  • †Neospirifer latus – or unidentified comparable form
  • †Neospirifer triplicatus
• †Neosyringopora
  • †Neosyringopora multattenuata
• †Neozeacrinus
  • †Neozeacrinus coronulus
  • †Neozeacrinus wanneri

• 

  Fossil of the Cambrian trilobite Nephrolenellus

  †Nephrolenellus
  • †Nephrolenellus geniculatus
  • †Nephrolenellus greniculatus – type locality for species
• †Nervostrophia
• †Nevadacrinus
  • †Nevadacrinus geniculatus
• †Nevadaspira – type locality for genus
  • †Nevadaspira cooperi – type locality for species
• †Nevadatubulus – type locality for genus
  • †Nevadatubulus dunfee – type locality for species
• †Nevadella
  • †Nevadella eucharis

• 

  Fossil of the Cambrian trilobite Nevadia

  †Nevadia
  • †Nevadia parvoconica
  • †Nevadia weeksi
• †Nevadoceras
  • †Nevadoceras steelei – type locality for species
• †Nevadocoelia
  • †Nevadocoelia grandis
  • †Nevadocoelia pulchrata
  • †Nevadocoelia traini
  • †Nevadocoelia wistae
• †Newberria
• †Nicholsonella – tentative report
• †Nicklesopora
  • †Nicklesopora avia
• †Nicolella – tentative report
• †Nicollidina
  • †Nicollidina brevis
• †Nielsonia – or unidentified related form
• †Nileus
  • †Nileus hesperaffinis
  • †Nileus scrutator – or unidentified related form
• †Niobe
  • †Niobe quadraticaudata – or unidentified comparable form
• †Niobella
• †Nisusia – tentative report
• †Noblella
  • †Noblella tremadociensis – type locality for species
• †Normalograptus
  • †Normalograptus ajjeri
  • †Normalograptus angustus
  • †Normalograptus elegantulus
  • †Normalograptus extraordinarius
  • †Normalograptus myrniensis
  • †Normalograptus ojsuensis
• †Nothorthis – tentative report
• †Notopeltis
  • †Notopeltis orthometopa
• †Nucleospira
  • †Nucleospira subsphaerica – type locality for species
• †Nuculavus
  • †Nuculavus levatiformis
• †Nuculoidea
• †Nuculopsis
  • †Nuculopsis darlingensis – or unidentified comparable form
  • †Nuculopsis girtyi
  • †Nuculopsis levatiformis
• †Nuia
• †Nyctopora
• †Nyella
  • †Nyella clinolimbata
  • †Nyella granosa
  • †Nyella immoderata
  • †Nyella plana
  • †Nyella rara

O

• 

  Illustration of fossils of the Cambrian brachiopod Obolella

  †Obolella
• †Obolus
• †Odontospirifer
  • †Odontospirifer type locality for species A – informal
• †Oepikina
• †Ogygopsis
  • †Ogygopsis batis
  • †Ogygopsis typicalis
• †Oistodus
  • †Oistodus contractus
  • †Oistodus lanceolatus – or unidentified comparable form
• †Oklahomacrinus
  • †Oklahomacrinus triangulus
• †Olenaspella
  • †Olenaspella paucisegmenta
  • †Olenaspella regularis
  • †Olenaspella separata – type locality for species

• 

  Restoration of the Cambrian trilobite Olenellus

  †Olenellus
  • †Olenellus chiefensis – type locality for species
  • †Olenellus clarki
  • †Olenellus fowleri – type locality for species
  • †Olenellus fremonti – or unidentified comparable form
  • †Olenellus gilberti
  • †Olenellus howelli
  • †Olenellus multinodus
  • †Olenellus puertoblancoensis – tentative report
  • †Olenellus terminatus – type locality for species

• 

  Fossil preserving carbon films left by the legs and antennae of the Cambrian trilobite Olenoides

  †Olenoides
  • †Olenoides maladensis
  • †Olenoides steptoensis – type locality for species
• †Olenus
  • †Olenus wilsoni
• †Oligometopus
  • †Oligometopus contractus
• †Ollenellus
  • †Ollenellus gilberti
• †Omphalocirrus – tentative report
• †Omphalotrochus
• †Onchocephalites
  • †Onchocephalites claytonensis – type locality for species
• †Onchocephalus
  • †Onchocephalus maior – or unidentified comparable form
  • †Onchocephalus major – or unidentified comparable form
  • †Onchocephalus palupus – type locality for species
• †Oncochilus
• †Onuphlonella – tentative report
• †Onychoplecia – tentative report
• †Ophioxenikos
  • †Ophioxenikos langenheimi
• †Opikina
• †Opipeuter
• †Opisthotreta
  • †Opisthotreta indistincta – type locality for species
  • †Opisthotreta transversa – type locality for species
• †Opsiosoryctocephalus – type locality for genus
  • †Opsiosoryctocephalus ophis – type locality for species
• †Orbiculoidea
  • †Orbiculoidea capuliformis
  • †Orbiculoidea missouriensis
  • †Orbiculoidea moorefieldana – or unidentified related form
• †Orecopia
  • †Orecopia mccoyi
• †Oriostoma
  • †Oriostoma gerbaulti
• †Oriskania
• †Orthambonites
  • †Orthambonites bifurcatus
  • †Orthambonites decipiens – or unidentified comparable form
  • †Orthambonites dinorthoides
  • †Orthambonites eucharis
  • †Orthambonites mazourkaensis – or unidentified comparable form
  • †Orthambonites minisculus
  • †Orthambonites minusculus
  • †Orthambonites patulus
  • †Orthambonites paucicostatus
  • †Orthambonites subulata
• †Orthidiella
  • †Orthidiella carinata
  • †Orthidiella costellata
  • †Orthidiella extensa
  • †Orthidiella longwelli
• †Orthidium
  • †Orthidium bellulum
  • †Orthidium fimbriatum – or unidentified related form
• †Orthis
• †Orthoceras
• †Orthograptus
  • †Orthograptus calcaratus
  • †Orthograptus truncatus
• †Orthonema
• †Orthonychia
  • †Orthonychia occidens
• †Orthoretiolites
  • †Orthoretiolites hami
• †Orthostrophella
  • †Orthostrophella monitorensis – type locality for species
• †Orthostrophia
• †Orthotetes
  • †Orthotetes kaskaskiensis
  • †Orthotetes occidentalis
• †Orthotichia – tentative report
• †Orthovertella
• †Orulgania
• †Oryctocephalina
  • †Oryctocephalina maladensis – tentative report
• †Oryctocephalites
  • †Oryctocephalites claytonensis – type locality for species
  • †Oryctocephalites palmeri
  • †Oryctocephalites rasettii
  • †Oryctocephalites runcinatus
  • †Oryctocephalites typicalis
• †Oryctocephalus
  • †Oryctocephalus americanus – type locality for species
  • †Oryctocephalus indicus
  • †Oryctocephalus maladensis
  • †Oryctocephalus nyensis
  • †Oryctocephalus orientalis
  • †Oryctocephalus primus
• †Otarion

• 

  Life restoration of the Cambrian priapulid worm relative Ottoia

  †Ottoia
• †Ottoseetaxis
• †Oulodus
  • †Oulodus rohneri
  • †Oulodus ulrichi
• †Ovatia
  • †Ovatia latior – or unidentified comparable form
  • †Ovatia nodosa
• †Ovatoryctocara – tentative report
• †Oxoplecia
  • †Oxoplecia monitorensis
  • †Oxoplecia nevadensis
• †Oxyspira – type locality for genus
  • †Oxyspira murphyi – type locality for species
• †Ozarkodina
  • †Ozarkodina hassi
  • †Ozarkodina oldhamensis – tentative report
  • †Ozarkodina raaschi
  • †Ozarkodina tenuis – or unidentified comparable form

P

• †Pachyaspis
  • †Pachyaspis gallagari – type locality for species
  • †Pachyaspis longa – type locality for species
• †Pachyconulus
  • †Pachyconulus parvalus
• †Pachydictya
• †Pachyfavosites
• †Pachyphyllum
• †Pachystrophia
• †Pacificocoelia
  • †Pacificocoelia infrequens
• †Paeckelmanella
• †Paedeumias
  • †Paedeumias granulatus – type locality for species
  • †Paedeumias nevadensis – tentative report
• †Paenebeltella

• 

  Fossil of the Cambrian trilobite Pagetia

  †Pagetia
  • †Pagetia arenosa
  • †Pagetia clytia
  • †Pagetia maladensis
  • †Pagetia mucrogena
  • †Pagetia prolata
  • †Pagetia resseri
  • †Pagetia rugosa
• †Paladin
• †Palaeocapulus
  • †Palaeocapulus piso
• †Palaeocyclus
  • †Palaeocyclus eurylophus
• †Palaeoneilo
  • †Palaeoneilo mcchesneyana
• †Palaeophippium
  • †Palaeophippium octaramosum – type locality for species
• †Palaeophyllum
• †Palaeosphaera – type locality for genus
  • †Palaeosphaera micra – type locality for species
• †Palaeostylus
• †Palaeotextularia
  • †Palaeotextularia consobrina – or unidentified loosely related form
• †Palaeotrifidus – type locality for genus
  • †Palaeotrifidus ballator – type locality for species
  • †Palaeotrifidus imbifurcus – type locality for species
• †Palaeotripus
  • †Palaeotripus sexabrachiatus – type locality for species
• †Paleofavosites
• †Paleoneilo
• †Palliseria – type locality for genus
  • †Palliseria longwelli – type locality for species
  • †Palliseria robusta
• †Palmettaspis – type locality for genus
  • †Palmettaspis consorta – type locality for species
  • †Palmettaspis lidensis
  • †Palmettaspis parallela – type locality for species
• †Paltodus
• †Pamchonetes
  • †Pamchonetes macrostriatus
• †Panacus – type locality for genus
  • †Panacus palmeri – type locality for species
• †Pancus – type locality for genus
  • †Pancus palmeri – type locality for species
• †Panderodus
  • †Panderodus feulneri
  • †Panderodus unicostatus
• †Pandorinellian
  • †Pandorinellian linguiformis
• †Pandorinellina
  • †Pandorinellina angustinpennatus – or unidentified comparable form
  • †Pandorinellina angustipennatus – or unidentified comparable form
  • †Pandorinellina exigua
  • †Pandorinellina expansa
  • †Pandorinellina linguiformis
  • †Pandorinellina steinhornensis
• †Papiliophyllum
  • †Papiliophyllum murphyi
  • †Papiliophyllum vescum
• †Paraantagmus
  • †Paraantagmus latus
• †Parabellefontia
  • †Parabellefontia concinna – or unidentified comparable form
• †Parabolablastus
  • †Parabolablastus elongatus – type locality for species
• †Parabolinella
  • †Parabolinella hecuba
  • †Parabolinella tumifrons – or unidentified comparable form
• †Paracaligelloides
• †Parachaetes
• †Parachonetes
  • †Parachonetes macrostriatus
• †Paraconularia
• †Paracrothyris
• †Paracyclas
• †Parafafallotaspis
• †Parafallotaspis
• †Parafusulina
• †Paragloborilus
• †Paraheritschioides
  • †Paraheritschioides californiense
  • †Paraheritschioides fergusonensis – type locality for species
  • †Paraheritschioides grandis
  • †Paraheritschioides nevadaensis – type locality for species
  • †Paraheritschioides stevensi
• †Parahousia
  • †Parahousia constricta
  • †Parahousia subequalis
• †Parahystricurus
• †Parajuresania
  • †Parajuresania nebrascensis
• †Paralbertella
  • †Paralbertella bosworthi
  • †Paralbertella bosworthy
• †Paralenorthis
  • †Paralenorthis marshalli
• †Parallelodon
  • †Parallelodon truncatus – or unidentified related form
• †Paramillerella
  • †Paramillerella inflecta
  • †Paramillerella pressa
• †Paranacyathus
• †Paranevadella
• †Paraorthograptus
  • †Paraorthograptus pacificus
  • †Paraorthograptus uniformis
• †Paraparchites
  • †Paraparchites cyclopeus – or unidentified related form
  • †Paraparchites nickelsi – or unidentified comparable form
• †Paraperrinites
  • †Paraperrinites subcumminsi – type locality for species
• †Parapholidostrophia – type locality for genus
  • †Parapholidostrophia harperi – type locality for species
• †Paraplegmatograptus
  • †Paraplegmatograptus uniformis
• †Paraporcellia
  • †Paraporcellia rohri
• †Parapoulsenia
  • †Parapoulsenia lata – or unidentified comparable form
• †Parapugnax
  • †Parapugnax bactrianense – type locality for species
• †Pararachnastraea
  • †Pararachnastraea illipahensis – type locality for species
  • †Pararachnastraea moormanensis – type locality for species
• †Parareteograptus
  • †Parareteograptus parvus
  • †Parareteograptus sinensis
  • †Parareteograptus turgidus
• †Pararhizophyllum – type locality for genus
  • †Pararhizophyllum parvulum – type locality for species
• †Paraschmidtella – tentative report
• †Parastringocephalus
• †Parastrophina – tentative report
• †Parathuramina
• †Paratikhinella
• †Parechidnina
  • †Parechidnina nevadensis – type locality for species
• †Parenthatia
• †Parethelocrinus
  • †Parethelocrinus rectilatus
• †Pareuloma
• †Parkaspis
  • †Parkaspis drumensis
• †Parkula
  • †Parkula esmeraldina – type locality for species
• †Paroistodus – tentative report
• †Patellispongia
  • †Patellispongia brosiusae – type locality for species
  • †Patellispongia oculata
• †Paterina
• †Paterula
• †Paterulus
• †Patriaspirifer
  • †Patriaspirifer kobehana
• †Paucicostella – tentative report
• †Paucicrura
  • †Paucicrura cristifera
  • †Paucicrura subplana – or unidentified comparable form
• †Paucispinifera – tentative report

• 

  Life restoration of the Cambrian trilobite Peachella

  †Peachella
  • †Peachella iddingsi
• †Peelerophon – tentative report
• †Pegmarhynchia
• †Pelagiella
• †Pelekygnathus
  • †Pelekygnathus linguiformis
  • †Pelekygnathus parawebbi
  • †Pelekygnathus pseudofoliatus
  • †Pelekygnathus xylus
• †Pelekysgnathus
  • †Pelekysgnathus angustipennatus
  • †Pelekysgnathus eiflius
  • †Pelekysgnathus intermedius
  • †Pelekysgnathus linguiformis
  • †Pelekysgnathus parawebbi
  • †Pelekysgnathus pseudofoliatus
  • †Pelekysgnathus robusticostatus
  • †Pelekysgnathus trigonicus
• †Peltabellia – tentative report
• †Peniculauris
  • †Peniculauris ivesi
• †Penniretepora
  • †Penniretepora oppositus
  • †Penniretepora trilineata
• †Pentamerella
  • †Pentamerella davidsoni – or unidentified comparable form
  • †Pentamerella wintereri
• †Pentamerifera
• †Pentameroides

• 

  Fossilized shell of the Silurian-Middle Devonian brachiopod Pentamerus

  †Pentamerus
• †Pentaxocrinus
  • †Pentaxocrinus quinarius
• †Pentlandella
• †Pentlandia
  • †Pentlandia merriami – type locality for species
• †Pentremites
• †Peraspis
  • †Peraspis erugata
• †Pericyclus
  • †Pericyclus antelopensis – type locality for species
  • †Pericyclus filaris
• †Perimestocrinus
  • †Perimestocrinus nevadensis
  • †Perimestocrinus oasis
• †Periodon
  • †Periodon aculeatus – tentative report
• †Perischoclonus
• †Perissopliomera
  • †Perissopliomera maclachlani
• †Perissopyge
  • †Perissopyge triangulata
• †Permastraea
  • †Permastraea biseptata – type locality for species
  • †Permastraea buttensis – type locality for species
  • †Permastraea campophylloides
  • †Permastraea nevadensis – type locality for species
• †Permocalculus
• †Permophorus
• †Pernopecten

• 

  Assemblage of fossils of the Cambrian trilobite Itagnostus interstrictus, until recently known as Peronopsis interstricta

  †Peronopsis
  • †Peronopsis amplaxis
  • †Peronopsis bonnerensis
  • †Peronopsis brighamensis
  • †Peronopsis fallax
  • †Peronopsis segmenta
• †Perspicaris
• †Peruvispira
  • †Peruvispira boreala – type locality for species
• †Petalaxis
  • †Petalaxis elyensis – type locality for species
  • †Petalaxis exiguus
  • †Petalaxis mokomokensis – type locality for species
  • †Petalaxis occidentalis
• †Petalocystites
• †Petasmatherus
  • †Petasmatherus type locality for species A – informal
• †Petigurus
  • †Petigurus inexpectatus
• †Petrochus
• †Petschoracrinus – tentative report

• 

  Fossil of the Late Ordovician-Late Devonian trilobite Phacops

  †Phacops
• †Phalacroma
• †Phanocrinus – tentative report
  • †Phanocrinus insolitus
• †Phenacocyclas
• †Phestia
  • †Phestia perumbonata
• †Phillipsia
  • †Phillipsia peroccidens
• †Pholidostrophia
• †Phormograptus
  • †Phormograptus conectus
  • †Phormograptus connectus
• †Phragmodus
  • †Phragmodus undatus

• 

  Spadella cephaloptera

  †Phragmophora
• †Phragmorthis
  • †Phragmorthis antiqua – type locality for species
• †Phragmostrophia
  • †Phragmostrophia merriami – type locality for species
• †Phrenophoria
  • †Phrenophoria type locality for species A – informal
  • †Phrenophoria type locality for species B – informal
• †Phricodothyris
• †Phricodythyris
  • †Phricodythyris perplexa
• †Phrycodothyris
  • †Phrycodothyris perplexa
• †Phyllocystis
• †Phyllodictya
  • †Phyllodictya crystallaria – or unidentified comparable form

• 

  Fossil of the Early Ordovician graptolite Phyllograptus

  †Phyllograptus
  • †Phyllograptus anna
• †Physalidopisthia – tentative report
• †Picnotreta
  • †Picnotreta lophocracenta
• †Pilekia – tentative report
• †Pinctus
• Pinna
  • †Pinna innexpectans
• †Pinnatulites
• †Pinyonastraea
• †Piochella
  • †Piochella peasleensis
• †Plagioglypta
• †Plagiura
  • †Plagiura extensa
  • †Plagiura minor
  • †Plagiura retracta
• †Planoarchaediscus
• †Platuzona – or unidentified comparable form
• †Platybolbina

• 

  Fossilized shell of the Silurian-Early Triassic sea snail Platyceras

  †Platyceras
  • †Platyceras trojani – type locality for species
• †Platycrinites
• †Platycrinus – tentative report
• †Platyschisma
• †Platystrophia
• †Platyterorhynchus
  • †Platyterorhynchus russelli
• †Platyworthenia
• †Platyzona
• †Plaxocrinus
  • †Plaxocrinus piutae
• †Plectatrypa
  • †Plectatrypa imbricata – or unidentified comparable form
• †Plectelasma
  • †Plectelasma type locality for species A – informal
  • †Plectelasma type locality for species B – informal
• †Plectodina
  • †Plectodina florida
  • †Plectodina tenuis
• †Plectogyra
  • †Plectogyra irregularis
  • †Plectogyra tumesepta
  • †Plectogyra tumula
• †Plectorthis
  • †Plectorthis obesa
  • †Plectorthis perplexus
• †Plectotrophia – tentative report
• †Pleiopleurina
  • †Pleiopleurina anticlastica
• †Plethopeltis
  • †Plethopeltis arbucklensis – or unidentified comparable form
• †Plethoschisma
  • †Plethoschisma grandis

• 

  Fossil of the Late Ordovician cystoid echinoderm Pleurocystites

  †Pleurocystites
• †Pleurograptus
  • †Pleurograptus lui
• †Pleurorima
  • †Pleurorima hoffmannae – type locality for species
• †Pleurorthis
  • †Pleurorthis beattyensis
• †Pleurosiphonella
• †Plicatolina
• †Plicocyathus
  • †Plicocyathus rozanovi
• †Plicoplasia
  • †Plicoplasia cooperi
• †Pliomeroides
• †Pliomerops
  • †Pliomerops canadensis – or unidentified comparable form
• †Plummericrinus
  • †Plummericrinus bulbosus
  • †Plummericrinus jelli
• †Polidevcia
  • †Polidevcia arctura – type locality for species
  • †Polidevcia bellistriata
  • †Polidevcia obesa
• †Poliella
  • †Poliella denticulata
  • †Poliella germana
  • †Poliella leipalox – type locality for species
  • †Poliella leipolox
  • †Poliella lomataspis
  • †Poliella ovala
  • †Poliella prima – or unidentified comparable form
• †Poliellaites
  • †Poliellaites gloriosa
• †Politicurus – tentative report
  • †Politicurus politus – or unidentified related form
• †Polusocrinus
  • †Polusocrinus amplus
• †Polygnathus
  • †Polygnathus abbessensis
  • †Polygnathus angusticostatus
  • †Polygnathus angustipennatus – or unidentified comparable form
  • †Polygnathus bagialensis
  • †Polygnathus benderi
  • †Polygnathus bultyncki
  • †Polygnathus costatus
  • †Polygnathus damelei – type locality for species
  • †Polygnathus eiflius
  • †Polygnathus gronbergi
  • †Polygnathus holynensis – type locality for species
  • †Polygnathus linguiformis
  • †Polygnathus parawebbi
  • †Polygnathus pseudofoliatus
  • †Polygnathus robertensis – type locality for species
  • †Polygnathus salixensis – type locality for species
  • †Polygnathus serotinus
• †Polyplucograptus
• †Polypora
  • †Polypora keyserlingiformis – type locality for species
  • †Polypora remota
  • †Polypora sargaensis
• †Polyporella
  • †Polyporella helgersonia – type locality for species
• †Polythalamia – type locality for genus
  • †Polythalamia americana – type locality for species
• †Pontisia
  • †Pontisia boodi
• †Porcellia
  • †Porcellia denayi
• †Poronileus
  • †Poronileus fistulosus
  • †Poronileus vallancei
• †Porosublastus
  • †Porosublastus inexpectus
• †Posidonia
  • †Posidonia becheri
• †Poteriocrinites
  • †Poteriocrinites permicus
• †Praedaraelites
  • †Praedaraelites loeblichi
• †Praenatica
• †Praewaagenoconcha
• †Prasopora
• †Prehousia
  • †Prehousia alata
  • †Prehousia impolita
  • †Prehousia indenta
  • †Prehousia prima
  • †Prehousia semicircularis
• †Presbynileus
  • †Presbynileus ibexensis
• †Primaspis
• †Prioniodina – tentative report
• †Priscella
• †Proaulopora
• †Prodentalium
  • †Prodentalium canna
• †Productella
• †Proehmaniella
  • †Proehmaniella hebes – tentative report

• 

  Restoration of the Silurian trilobite Proetus

  †Proetus
• †Profallotaspis – tentative report
• †Profusulinella
  • †Profusulinella copiosa
  • †Profusulinella decora
• †Prolecanites
  • †Prolecanites lyoni
• †Promytilus
• †Proplina
  • †Proplina propina – or unidentified comparable form
• †Protathyris
  • †Protathyris hesperalis
• †Protocalymene
  • †Protocalymene mcallesteri
• †Protochonetes
  • †Protochonetes elyensis – type locality for species
• †Protocortezorthis
  • †Protocortezorthis windmillensis – type locality for species
• †Protoentactinia
  • †Protoentactinia gracilispinosa – type locality for species
  • †Protoentactinia latospinosa – type locality for species
  • †Protoentactinia minuta – type locality for species
• †Protopanderodus
  • †Protopanderodus insculptus
• †Protopharetra
  • †Protopharetra arcybata – type locality for species
  • †Protopharetra junensis
• †Protopliomerops
• †Protopresbynileus
  • †Protopresbynileus glaber – or unidentified comparable form
  • †Protopresbynileus wildeni
• †Protospongia
  • †Protospongia conica
  • †Protospongia spina – type locality for species
• †Prototreta
• †Protowentzelella
  • †Protowentzelella cystosa – type locality for species
  • †Protowentzelella kunthi – type locality for species
  • †Protowentzelella variabilis – type locality for species
• †Protozyga – tentative report
• †Psalikilus
  • †Psalikilus pikum
• †Psephosthenaspis
  • †Psephosthenaspis ellipsepyga
  • †Psephosthenaspis glabrior
  • †Psephosthenaspis pseudobathyurus
• †Pseudagnostus
  • †Pseudagnostus communis
  • †Pseudagnostus contracta – type locality for species
  • †Pseudagnostus josephus
• †Pseudedriophus
  • †Pseudedriophus guensburgi
• †Pseudoammodiscus
• †Pseudoatrypa – tentative report
  • †Pseudoatrypa percrassa
• †Pseudobatostomella
  • †Pseudobatostomella irregularis – type locality for species
• †Pseudobelodina
  • †Pseudobelodina inclinata
  • †Pseudobelodina kinki
  • †Pseudobelodina vulgaris
• †Pseudocybele
  • †Pseudocybele altinasuta
  • †Pseudocybele lemurei
  • †Pseudocybele nasuta
• †Pseudocystophora
  • †Pseudocystophora complexa
• †Pseudoendothyra
• †Pseudofusulinella
  • †Pseudofusulinella dunbari
  • †Pseudofusulinella jeffordsi – type locality for species
  • †Pseudofusulinella pusilla – type locality for species
  • †Pseudofusulinella rotunda
• †Pseudohystricurus
• †Pseudokingstonia
  • †Pseudokingstonia exotica
• †Pseudomera
  • †Pseudomera arachnopyge
  • †Pseudomera barrandei
• †Pseudomonotis
• †Pseudoneotodus
  • †Pseudoneotodus beckmanni
  • †Pseudoneotodus mitratus
• †Pseudoolenoides
  • †Pseudoolenoides acicaudus
  • †Pseudoolenoides dilectus – or unidentified comparable form
• †Pseudooneotodus
  • †Pseudooneotodus mitratus
• †Pseudoparazyga
  • †Pseudoparazyga cooperi
• †Pseudoreichelina
• †Pseudorthoceras
• †Pseudosaratogia
  • †Pseudosaratogia abnormis
  • †Pseudosaratogia leptogranulata
• †Pseudostaffella
  • †Pseudostaffella needhami
• †Pseudosyrinx
  • †Pseudosyrinx desiderata
• †Pseudotaxis
• †Pseudovermiporella
• †Pseudozaphrentoides
  • †Pseudozaphrentoides hanseni
  • †Pseudozaphrentoides trojana – type locality for species
• †Pseudozygopleura
• †Ptarmiganoides
  • †Ptarmiganoides araneicauda – type locality for species
  • †Ptarmiganoides crassaxis
  • †Ptarmiganoides hexacantha
  • †Ptarmiganoides lepida – tentative report
  • †Ptarmiganoides propinqua
• †Pterinopecten
  • †Pterinopecten spio
• †Pterocephalia
  • †Pterocephalia concava
  • †Pterocephalia elongata
  • †Pterocephalia punctata
  • †Pterocephalia sanctisabae

• 

  Fossil of the Cambrian trilobite Ptychagnostus

  †Ptychagnostus
  • †Ptychagnostus atavus
  • †Ptychagnostus intermedius
  • †Ptychagnostus seminula
• †Ptychomphalina
  • †Ptychomphalina type locality for species – informal
• †Ptychophyllum – tentative report
• †Ptychopleurella
• †Ptychopleurites
  • †Ptychopleurites bevifrons – or unidentified comparable form
• †Ptyocephalus
  • †Ptyocephalus accliva
  • †Ptyocephalus vigilans
• †Pugilator
  • †Pugilator deckeri
• †Punctaparchites
• †Punctospirifer
  • †Punctospirifer gnomus – type locality for species
  • †Punctospirifer kentuckensis
  • †Punctospirifer kentuekyensis
• †Punka
  • †Punka caecata
• †Pycnostylus

Q

• †Quadratia
  • †Quadratia hirsutiformis
• †Quadratonucula
  • †Quadratonucula stella – type locality for species
• †Quadricarina
  • †Quadricarina glabrobasis
  • †Quadricarina type locality for species A. – informal
• †Quadrithyris
  • †Quadrithyris minuens – or unidentified comparable form
  • †Quadrithyris vijaicus – or unidentified comparable form
• †Quadrochonetes
  • †Quadrochonetes type locality for species A – informal
• †Quasimodaspis
  • †Quasimodaspis brentsae

R

• †Radiastraea
  • †Radiastraea arachne
  • †Radiastraea nevadensis
• †Radiastrea
• †Radiatrypa
  • †Radiatrypa advena
  • †Radiatrypa klukasi
• †Rafinesquina
• †Raphistoma
  • †Raphistoma gubanovi
• †Raymondaspis
  • †Raymondaspis vespertina
• †Raymondella
  • †Raymondella nevadensis
• †Raymondensis – tentative report
• †Raymondites – tentative report
• †Rayonnoceras

• 

  Fossil of the Early Ordovician-Permian benthic alga Receptaculites

  †Receptaculites
• †Rectifenestella
  • †Rectifenestella cordiretiformis – type locality for species
  • †Rectifenestella tenax
• †Rectograptus
  • †Rectograptus abbreviatus
• †Remopleurides
  • †Remopleurides similus – or unidentified comparable form
  • †Remopleurides simulus – or unidentified comparable form
• †Renalcis
• †Rensselaeria
• †Rensselaerina
• †Rensselandia
  • †Rensselandia cloudi – type locality for species
• †Repinaella
• †Resserella
• †Reteporidra
  • †Reteporidra anaphora
• †Reticulariina
• †Reticularina
  • †Reticularina campestris
  • †Reticularina spinosa
• †Reticulariopsis
• †Retilamina
  • †Retilamina debrennei
• †Retispira
  • †Retispira albapinensis
  • †Retispira nolani – type locality for species
• †Rhabdiferoceras – type locality for genus
  • †Rhabdiferoceras annuliferum – type locality for species
• †Rhabdocyclus
  • †Rhabdocyclus depressus
• †Rhabdomeson
• †Rhipidomella
  • †Rhipidomella carbonaria
  • †Rhipidomella elyensis
  • †Rhipidomella nevadensis
• †Rhipidothyris
  • †Rhipidothyris circo – type locality for species
• †Rhizophyllum
  • †Rhizophyllum inornatum
• †Rhombifera
• †Rhombopora
  • †Rhombopora cornwallis
• †Rhombotrypella
  • †Rhombotrypella regularis
  • †Rhombotrypella sunfloweria
• †Rhynchocamara
  • †Rhynchocamara breviplicata – or unidentified comparable form
  • †Rhynchocamara sublaevis
• †Rhynchopora
  • †Rhynchopora taylori
• †Rhynchospirina
• †Rhynoleichus
  • †Rhynoleichus weeksi
• †Rhysostrophia
  • †Rhysostrophia nevadensis
  • †Rhysostrophia occidentalis
• †Rhyssochonetes
  • †Rhyssochonetes solox
• †Rimmyjimina
• †Rioceras – tentative report
• †Robergia
• †Robergiella
• †Rossaspis
• †Rossoceras
• †Rossodus – tentative report
  • †Rossodus tenuis
• †Rostranteris
  • †Rostranteris type locality for species A – informal
• †Rotopericyclus
  • †Rotopericyclus pinyonensis – type locality for species
• †Roundya
• †Rousseauspira
  • †Rousseauspira teicherti
• †Ruedemannoceras
• †Rugatia
  • †Rugatia occidentalis – or unidentified comparable form
• †Rugocoelia – type locality for genus
  • †Rugocoelia eganensis – type locality for species
• †Rugosochonetes

S

• †Sabellidites
  • †Sabellidites canadiensis
• †Saffordophyllum
• †Sagittodontus
  • †Sagittodontus robustus – tentative report
• †Sallya
• †Salopina

• 

  Illustration of fossilized shells of the mysterious Cambrian organism Salterella

  †Salterella
• †Sandolasma
  • †Sandolasma buttense – type locality for species
  • †Sandolasma elegans
  • †Sandolasma hillae – type locality for species
  • †Sandolasma perplexa – type locality for species
• †Sanguinolites
  • †Sanguinolites salteri
• †Sansabella – tentative report
• †Scabbardella
  • †Scabbardella altipes
• †Scandodus
  • †Scandodus unicostatus
• †Scaphorthis
• †Sceptropora
  • †Sceptropora faculum
• †Schedexocrinus
• †Schistometopus
• †Schizambon
• †Schizodus
  • †Schizodus curtiformis
  • †Schizodus semistriatus – or unidentified comparable form
• †Schizophoria
  • †Schizophoria depressa
  • †Schizophoria fascicostella – or unidentified comparable form
  • †Schizophoria mcfarlanei
  • †Schizophoria nevadaensis
  • †Schizophoria parafragilis – type locality for species
  • †Schizophoria simpsoni
  • †Schizophoria texana
• †Schizoporia
  • †Schizoporia resupinoides
  • †Schizoporia texana
• †Schmidtella
• †Schmidtites – tentative report
• †Schubertella
  • †Schubertella kingi
• †Schuchertella
• †Schwagerina
  • †Schwagerina jeffordsi – type locality for species
  • †Schwagerina munda – type locality for species
  • †Schwagerina rotunda
• †Scinocephalus
  • †Scinocephalus solitecti – or unidentified related form
• †Sciophyllum
• †Scolopodus
  • †Scolopodus insculptus
• †Scotiaecystis – tentative report
• †Scotoharpes
• †Secuicollacta
  • †Secuicollacta stelligera – type locality for species
• †Selenimyalina
• †Semizona
  • †Semizona glindmeyeri
• †Septabrunsiina
• †Septaglomospiranella
• †Septatrypa
• †Septimyalina
  • †Septimyalina burmai
• †Septopora
  • †Septopora alternata
  • †Septopora bilateralis
• †Serpulospira
  • †Serpulospira annulatus – or unidentified comparable form
  • †Serpulospira swickae
• †Severella
• †Shamovella
• †Shastalasma
  • †Shastalasma woodi – type locality for species
• †Shoshonorthis
  • †Shoshonorthis swanensis – or unidentified comparable form
• †Shumardia
  • †Shumardia exopthalmus
• †Siderocyathus – type locality for genus
  • †Siderocyathus duncanae – type locality for species
• †Sieberella
  • †Sieberella problematica – or unidentified comparable form
  • †Sieberella pyriforma – type locality for species
• †Sigmocheilus
  • †Sigmocheilus flabellifer
  • †Sigmocheilus grata
  • †Sigmocheilus notha
  • †Sigmocheilus pogonipensis
• †Simulolenus
  • †Simulolenus granulatus
  • †Simulolenus quadrisulcatus
• †Sinotubuites
  • †Sinotubuites cienegensis
• †Sinuites

• 

  Fossil of the Carboniferous colonial rugose coral Siphonodendron

  †Siphonodendron
  • †Siphonodendron sinousum – or unidentified comparable form
  • †Siphonodendron sinuosum – or unidentified comparable form
  • †Siphonodendron whitneyi – or unidentified comparable form
• †Siphonodendrum
  • †Siphonodendrum sinuosum – or unidentified comparable form
• †Sivorthis
  • †Sivorthis eucharis
  • †Sivorthis occidentalis
• †Skenidioides
  • †Skenidioides oklahomensis
• †Skenidium
  • †Skenidium asellatum – or unidentified comparable form
• †Skippella
• †Soleniscus
• †Sowerbyella
  • †Sowerbyella merriami
  • †Sowerbyella perplexa – or unidentified comparable form
• †Sowerbyites
• †Spathognathodus
  • †Spathognathodus minutus – or unidentified comparable form
• †Spencia
  • †Spencia quadrata – type locality for species
• †Sphaerirhynchia

• 

  Assemblage of fossils of the Ordovician-Triassic blue-green alga Sphaerocodium

  †Sphaerocodium
• †Sphaerocoryphe
• †Sphenosteges
  • †Sphenosteges hispidus
• †Sphenothallus
• †Sphenotreta
  • †Sphenotreta sulcata – or unidentified comparable form
• †Spinatrypa
  • †Spinatrypa aspera – or unidentified comparable form
  • †Spinatrypa soetenica – or unidentified comparable form
• †Spinatrypina
  • †Spinatrypina angusticostata
  • †Spinatrypina comitata – or unidentified comparable form
  • †Spinatrypina lamellosa
  • †Spinatrypina recula – type locality for species
• †Spinella
  • †Spinella talenti – type locality for species
• †Spinoplasia
  • †Spinoplasia roeni – type locality for species
• †Spinulicosta
  • †Spinulicosta muirwoodi

• 

  Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer

  †Spirifer
  • †Spirifer arkansanus – or unidentified comparable form
  • †Spirifer centronatus
  • †Spirifer haydenianus – or unidentified related form
  • †Spirifer occidus
  • †Spirifer opimus
  • †Spirifer pellaensis – tentative report
  • †Spirifer rockymontanus
• †Spiriferella
  • †Spiriferella scobina – type locality for species
• †Spiriferellina
  • †Spiriferellina campestris
  • †Spiriferellina ceres
  • †Spiriferellina lata
• †Spiriferina
• †Spirigerina
  • †Spirigerina supramarginalis
• †Spirinella
  • †Spirinella pauciplicata
• †Spirocyathella – tentative report
  • †Spirocyathella microporosa – type locality for species
• †Spirodentalium
  • †Spirodentalium walcotti – type locality for species

• 

  Modern shells of the polychaete worm Spirorbis

  Spirorbis
• †Spongophyllum
• †Spygoria – type locality for genus
  • †Spygoria zappania – type locality for species
• †Squamaria
• †Squameofavosites
• †Stachyodes
• †Staffella
  • †Staffella expansa
• †Staufferella
• †Stauromatidium
• †Stegnopsis
• †Stegocoelia
• †Stelechophyllum – tentative report
• †Stellahexaformis – type locality for genus
  • †Stellahexaformis gersterensis – type locality for species
• †Stellarocrinus
  • †Stellarocrinus comptus
  • †Stellarocrinus cuneatus
• †Stenambon
  • †Stenambon megagranulus
  • †Stenambon paucigranulus
• †Stenodiscus
  • †Stenodiscus murdockensis – type locality for species
• †Stenoglaphyrites
  • †Stenoglaphyrites hesperius
  • †Stenoglaphyrites merriami
• †Stenoloron
  • †Stenoloron minor
• †Stenopecrinus – tentative report
  • †Stenopecrinus xerophilus
• †Stenopora
  • †Stenopora parvaexozona – type locality for species
• †Stenothecoides
• †Stephenaspis
  • †Stephenaspis avitus – type locality for species
  • †Stephenaspis highlandensis
• †Stereodictyum
  • †Stereodictyum proteron – type locality for species
• †Stereolasma
• †Stereostylus
  • †Stereostylus compressum
• †Stibaraster
• †Stictoporella

• 

  Fossil preserved in situ of a Carboniferous tree-like club moss relative with attached Stigmaria rhizome system

  †Stigmaria
  • †Stigmaria wedingtonensis
• †Strachanognathus
  • †Strachanognathus parvus
• †Straparollus
  • †Straparollus caementarius
  • †Straparollus lonemountainensis
  • †Straparollus spergenensis – or unidentified related form
• †Streblochondria
• †Streblopteria
  • †Streblopteria similis
• †Streblotrypa
  • †Streblotrypa elongata – type locality for species
• †Streptacis
• †Streptelasma
  • †Streptelasma prolongatum
• †Streptognathodus
  • †Streptognathodus unicornis
• †Streptorhynchus
• †Streptosolen
  • †Streptosolen mccafferyi – type locality for species
  • †Streptosolen nodosus – type locality for species
  • †Streptosolen occidentalis
• †Strianematina
• †Striatifera
• †Striatopora
• †Strigambitus
  • †Strigambitus bilobus
  • †Strigambitus transversus
  • †Strigambitus utahensis
• †Strigigenalis
• †Stringocephalus
  • †Stringocephalus nevadensis – type locality for species
• †Strobeus
• †Stromatopora
• †Strombodes
• †Stropheodonta
  • †Stropheodonta filicosta
  • †Stropheodonta magnacosta – type locality for species
• †Stropheodontida
• †Strophochonetes

• 

  Fossilized shell of the Ordovician-Silurian brachiopod Strophomena

  †Strophomena
• †Strophonella
  • †Strophonella bohemica – or unidentified comparable form
  • †Strophonella punctulifera – or unidentified comparable form
• †Strophostylus
  • †Strophostylus nevadensis – type locality for species
  • †Strophostylus tantillus – type locality for species
• †Stuartwellercrinus
  • †Stuartwellercrinus corbatoi
• †Stummelasma
  • †Stummelasma antelopense
  • †Stummelasma lonense
  • †Stummelasma sulfurense – type locality for species
• †Stygina – tentative report
• †Styliolina
• †Stylonema – tentative report
• †Stylopleura
  • †Stylopleura berthiaumi
  • †Stylopleura nevadensis
• †Styracograptus
  • †Styracograptus mississippiensis
  • †Styracograptus tatianae
• †Subrensselandia
  • †Subrensselandia nolani
• †Subrensselendia
• †Subretepora
• †Subulites
• †Sulcoretepora
  • †Sulcoretepora corticata
  • †Sulcoretepora irregularis
• †Sychnoelasma
  • †Sychnoelasma alrichanum – or unidentified comparable form
  • †Sychnoelasma ulrichanum – or unidentified comparable form
• †Symphysurina
  • †Symphysurina walcotti
• †Synarmocrinus
  • †Synarmocrinus brachiatus – type locality for species
• †Syndielasma
  • †Syndielasma biseptatum
• †Syngastrioceras
• †Synprioniodina – tentative report
• †Syntrophina – tentative report
• †Syntrophopsis
  • †Syntrophopsis polita
• †Synyphocrinus
  • †Synyphocrinus permicus
• †Syringaxon

• 

  Fossil of the Devonian tabulate coral Syringopora

  †Syringopora
  • †Syringopora surcularia
• †Syringostroma
• †Syspacephalus
  • †Syspacephalus crassus
  • †Syspacephalus laticeps – or unidentified comparable form
  • †Syspacephalus longus
  • †Syspacephalus uncus – tentative report
  • †Syspacephalus variosus – type locality for species

T

• †Tabulipora
  • †Tabulipora carbonaria – type locality for species
  • †Tabulipora hispida
• †Tabulophyllum
• †Taenora
  • †Taenora expansa
• †Tancrediopsis
  • †Tancrediopsis cuneata – or unidentified related form
• †Taphrodonta
  • †Taphrodonta parallela
• †Tapinotomaria
• †Tecnocyrtina
  • †Tecnocyrtina fissiplicata
  • †Tecnocyrtina missouriensis
• †Tegerocyathus
  • †Tegerocyathus edelsteini
• †Teichertina
  • †Teichertina americana – type locality for species
  • †Teichertina fitzroyensis
• †Teiichispira
  • †Teiichispira auricula – type locality for species
• †Telephina
• †Temnocheilus
• †Temnophyllum
  • †Temnophyllum waltheri – type locality for species
• †Tentaculites

• 

  Fossils of the Early-Late Ordovician graptolite Tetragraptus

  †Tetragraptus
  • †Tetragraptus bigsbyi
• †Tetraprioniodus – tentative report
  • †Tetraprioniodus costatus
• †Tetrataxis
  • †Tetrataxis angusta
• †Texacrinus
  • †Texacrinus distortus
• †Thamniscus
  • †Thamniscus erraticus – type locality for species
• †Thamnopora
  • †Thamnopora limitaris
• †Thamnosia
  • †Thamnosia depressa

• 

  Fossil of the Cambrian trilobite Thoracocare

  †Thoracocare
  • †Thoracocare idahoensis
• †Tikhinella
• †Timaniella
  • †Timaniella pseudocamerata – or unidentified comparable form
• †Timanodictya
  • †Timanodictya dichotoma – or unidentified comparable form
• †Toernquistia – tentative report
• †Tonkinaria
  • †Tonkinaria simpsoni
• †Tonkinella
  • †Tonkinella breviceps
  • †Tonkinella valida
• †Tonopahella – type locality for genus
  • †Tonopahella goldfieldensis – type locality for species
• †Toquimaella
  • †Toquimaella kayi – type locality for species
• †Toquimaphyllum
  • †Toquimaphyllum johnsoni
  • †Toquimaphyllum sentum – type locality for species
  • †Toquimaphyllum vulgare – type locality for species
• †Toquimia
  • †Toquimia kirki
• †Tortodus
  • †Tortodus australis
  • †Tortodus kockelianus
• †Torynifer
  • †Torynifer internascens – or unidentified comparable form
• †Totiglobus – type locality for genus
  • †Totiglobus nimius – type locality for species
• †Trachycheilus
  • †Trachycheilus whirlwindensis
• †Trachydomia
• †Trachyspira
• †Trampidocrinus
  • †Trampidocrinus bellicus
  • †Trampidocrinus phiola
• †Trematopora
• †Trematorthis
  • †Trematorthis tenuis
• †Trematospira
  • †Trematospira perforata
• †Trepospira

• 

  Restoration showing the top (left) and underside of the Late Ordovician trilobite Triarthrus

  †Triarthrus
• †Trichonodella
  • †Trichonodella barbara – or unidentified comparable form
• †Trigonirhynchia
  • †Trigonirhynchia occidens
• †Trigonocerca
  • †Trigonocerca typica
• †Trigrammaria
• †Trinodus
• †Tritoechia
  • †Tritoechia sinuata
• †Trocholites
• †Trochonema – tentative report
• †Tropidodiscus
• †Trupetostroma
• †Tryplasma
  • †Tryplasma duncanae
  • †Tryplasma radicula
• †Tschussovskenia
  • †Tschussovskenia connorsensis – type locality for species
  • †Tschussovskenia dilata
• †Tuberitina
• †Tumicephalus
  • †Tumicephalus depressus
• †Turbonitella
  • †Turbonitella biserialis – or unidentified related form

• 

  Fossilized shell of the Cambrian arthropod Tuzoia

  †Tuzoia
• †Tyersella
• †Tylonautilus
• †Tylothyris
• †Tympanuella
  • †Tympanuella transversa

U

• †Ufimia
• †Undispirifer
• †Uraloceras
  • †Uraloceras burtiense
  • †Uraloceras involutum
  • †Uraloceras nevadense – type locality for species
• †Uromystrum
  • †Uromystrum validum – or unidentified comparable form
• †Ursinella – type locality for genus
  • †Ursinella major – type locality for species
• †Utharocrinus

V

• †Vagrania
  • †Vagrania gronbergi
• †Valcourea
  • †Valcourea intracarinata
  • †Valcourea plana
  • †Valcourea transversa
• †Vallomyonia
  • †Vallomyonia claudiae
  • †Vallomyonia devonica
• †Varatrypa
• †Vargania
  • †Vargania gronbergi
• †Variatrypa
  • †Variatrypa exoleta
  • †Variatrypa licta – type locality for species
• †Varvia – tentative report
• †Verpaspongia – type locality for genus
  • †Verpaspongia nodosa – type locality for species
• †Verticillopora
• †Vesiculophyllum
• †Vesperispira – type locality for genus
  • †Vesperispira humboldtiana – type locality for species
• †Vidronovella
  • †Vidronovella fastigiata
• †Virgiana
  • †Virgiana utahensis – type locality for species
• †Volocephalina
  • †Volocephalina connexa
  • †Volocephalina variosa – type locality for species
• †Volocphalina
  • †Volocphalina variosa – type locality for species

W

• †Waagenella
  • †Waagenella vespertinus – type locality for species
• †Waagenites
  • †Waagenites type locality for species A – informal
  • †Waagenites type locality for species B – informal
• †Waagenoconcha – tentative report
• †Walliserodus
  • †Walliserodus amplissimus
  • †Walliserodus curvatus

• 

  Fossil of the Cambrian trilobite Wanneria

  †Wanneria
  • †Wanneria walcottana – or unidentified comparable form
• †Warburgella
  • †Warburgella rugulosa
• †Warrenella
  • †Warrenella franklinii
  • †Warrenella kirki
  • †Warrenella nevadensis
  • †Warrenella occidentalis
  • †Warrenella plicata
  • †Warrenella praekirki
• †Watsonella
• †Weirchellatia
• †Wellerella
  • †Wellerella delicatula – or unidentified comparable form
  • †Wellerella osagensis
  • †Wellerella truncata
• †Wendoverella – type locality for genus
  • †Wendoverella arca – type locality for species
• †Wenkchemnia
  • †Wenkchemnia sulcata
  • †Wenkchemnia walcotti
• †Westergaardites
• †Westmontia
  • †Westmontia devilensis
• †Weyerides – tentative report
• †Whittingtonia – tentative report
• †Wilberrya
  • †Wilberrya fragilis
• †Williamicyathus
• †Wilsonastraea
  • †Wilsonastraea fraseri – type locality for species
  • †Wilsonastraea parva – type locality for species
  • †Wilsonastraea smithi
• †Wimanella – tentative report
• †Winchellatia
• †Wjatkella
  • †Wjatkella hemiseptifera – type locality for species
  • †Wjatkella permiana
• †Worthenia
  • †Worthenia corrugata
• †Wujiajiania
  • †Wujiajiania sutherlandi
• †Wutinoceras
  • †Wutinoceras huygenae – or unidentified comparable form

X

• †Xenelasma – tentative report
• †Xenocheilos
  • †Xenocheilos granulosus
• †Xenostegium
  • †Xenostegium franklinense – or unidentified comparable form
• †Xestotrema
  • †Xestotrema pulchrum – type locality for species
• †Xystocrania
  • †Xystocrania perforator
  • †Xystocrania pyriformis – type locality for species

Y

• †Yakovlevia
  • †Yakovlevia multistriata – type locality for species
• †Yinograptus
  • †Yinograptus disjunctus
• †Yochelsonospira
  • †Yochelsonospira tenuilineata
• Yoldia
• †Youngia – tentative report
• †Yuknessaspis
  • †Yuknessaspis benningtonis
• †Yunnania

Z

• †Zacanthoides
  • †Zacanthoides alatus – or unidentified comparable form
  • †Zacanthoides demissus
  • †Zacanthoides divergensis
  • †Zacanthoides variacantha
  • †Zacanthoides walapai
• †Zacanthopsina – type locality for genus
  • †Zacanthopsina eperephes – type locality for species
• †Zacanthopsis
  • †Zacanthopsis contractus – type locality for species
  • †Zacanthopsis levis
• †Zelophyllum – tentative report
• †Zonophyllum
  • †Zonophyllum lonense
  • †Zonophyllum robertsense
• †Zygognathus
• †Zygospira

References

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.