Kaiparowits Basin, North America Platei

Regional Level Types
Kaiparowits Basin	Basin
North America Plate	Tectonic Plate

The Kaiparowits Basin is a medium Cenozoic and Mesozoic foreland basin in southwestern Utah and northwestern Arizona. It may have had its beginnings as an intracratonic sag basin. It is bordered on the north by the High Plateaus Volcanic Area, on the east by the Circle Cliffs Uplift, on the south by the Kaibab Uplift, and on the west by major north-south faults associated with the Basin and Range Province and the southwestern extent of the High Plateaus Volcanic Area.

Fossils

There are 138 fossil localities from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences	1513
Youngest Fossil Listed	37.2 Ma (Eocene)
Oldest Fossil Listed	251 Ma (Early/Lower Triassic)
Stratigraphic Units	Click here to view 33 stratigraphic units.
Stratigraphic Units	Unit No. Occurrences Age Claron 18 55.8 - 50.3 Ma (Eocene) Lance - Chiule 3 70.6 - 66 Ma (Late/Upper Cretaceous) Kaiparowits 254 83.5 - 70.6 Ma (Late/Upper Cretaceous) Wahweap - Middle 7 83.5 - 70.6 Ma (Late/Upper Cretaceous) Wahweap - Upper 21 83.5 - 70.6 Ma (Late/Upper Cretaceous) Wahweap - Capping Sandstone 1 83.5 - 70.6 Ma (Late/Upper Cretaceous) Wahweap 152 83.5 - 70.6 Ma (Late/Upper Cretaceous) Kaiparowits - Lower Middle 1 83.5 - 70.6 Ma (Late/Upper Cretaceous) Mancos Shale 1 83.5 - 70.6 Ma (Late/Upper Cretaceous) Straight Cliffs - John Henry 51 85.8 - 83.5 Ma (Late/Upper Cretaceous) Iron Springs 13 85.8 - 70.6 Ma (Late/Upper Cretaceous) Straight Cliffs 15 85.8 - 83.5 Ma (Late/Upper Cretaceous) Straight Cliffs - Smoky Hollow 51 93.5 - 89.3 Ma (Late/Upper Cretaceous) Tropic Shale 381 93.5 - 89.3 Ma (Late/Upper Cretaceous) Straight Cliffs - Tibbet Canyon 3 93.9 - 89.8 Ma (Late/Upper Cretaceous) Dakota 20 99.6 - 66 Ma (Late/Upper Cretaceous) Naturita 79 99.6 - 93.5 Ma (Late/Upper Cretaceous) Tropic 27 99.6 - 93.5 Ma (Late/Upper Cretaceous) Naturita - Culver Coal Zone 4 100.5 - 93.9 Ma (Late/Upper Cretaceous) San Rafael - Entrada Sandstone 3 163.5 - 150.8 Ma (Jurassic) Carmel - Co-op Creek 3 168.3 - 166.1 Ma (Middle Jurassic) Carmel 311 170.3 - 163.5 Ma (Middle Jurassic) San Rafael - Page Sandstone 1 171.6 - 164.7 Ma (Middle Jurassic) Glen Canyon - Navajo Sandstone 11 182.7 - 174.1 Ma (Jurassic) Glen Canyon - Kayenta 3 199.3 - 182.7 Ma (Early Jurassic) Glen Canyon - Kayenta - Springdale Sandstone 1 199.3 - 182.7 Ma (Early Jurassic) Glen Canyon - Moenave - Whitmore Point 2 201.3 - 199.3 Ma (Early Jurassic) Glen Canyon 1 201.3 - 182.7 Ma (Early Jurassic) Glen Canyon - Moenave - Dinosaur Canyon 5 201.3 - 199.3 Ma (Early Jurassic) Moenkopi 1 247.2 - 242 Ma (Triassic) Moenkopi - Virgin 10 251.3 - 247.2 Ma (Early/Lower Triassic) Sinbad 10 251.3 - 247.2 Ma (Early/Lower Triassic) Moenkopi - lower red 2 251.3 - 247.2 Ma (Early/Lower Triassic)
Fossils from Region	Click here to show the list.
Accepted Name Hierarchy Age Anthozoa class Animalia : Cnidaria : Anthozoa 170.3 - 166.1 Ma Middle Jurassic Trochocyathus (Platycyathus) subgenus Animalia : Cnidaria : Anthozoa : Scleractinia : Caryophylliidae : Trochocyathus : Trochocyathus (Platycyathus) 99.6 - 93.5 Ma Late/Upper Cretaceous Serpula genus Animalia : Annelida : Polychaeta : Sabellida : Serpulidae : Serpula 99.6 - 93.5 Ma Late/Upper Cretaceous Scaphopoda class Animalia : Mollusca : Scaphopoda 99.6 - 93.5 Ma Late/Upper Cretaceous Dentalium genus Animalia : Mollusca : Scaphopoda : Dentaliida : Dentaliidae : Dentalium 99.6 - 93.5 Ma Late/Upper Cretaceous Gastropoda class Animalia : Mollusca : Gastropoda 170.3 - 50.3 Ma Phanerozoic Neritina genus Animalia : Mollusca : Gastropoda : Cycloneritida : Neritidae : Neritina 170.3 - 166.1 Ma Middle Jurassic Nododelphinula genus Animalia : Mollusca : Gastropoda : Trochida : Nododelphinulidae : Nododelphinula 170.3 - 166.1 Ma Middle Jurassic Ooliticia genus Animalia : Mollusca : Gastropoda : Seguenziida : Eucyclidae : Ooliticia 170.3 - 166.1 Ma Middle Jurassic Pleurotomaria genus Animalia : Mollusca : Gastropoda : Trochida : Microdomatidae : Pleurotomaria 170.3 - 166.1 Ma Middle Jurassic Anchura genus Animalia : Mollusca : Gastropoda : Littorinimorpha : Aporrhaidae : Anchura 99.6 - 93.5 Ma Late/Upper Cretaceous Cassiope genus Animalia : Mollusca : Gastropoda : Cassiopidae : Cassiope 100.5 - 93.9 Ma Late/Upper Cretaceous Cerithiopsis genus Animalia : Mollusca : Gastropoda : Littorinimorpha : Cerithiopsidae : Cerithiopsis 99.6 - 93.5 Ma Late/Upper Cretaceous Drepanocheilus genus Animalia : Mollusca : Gastropoda : Littorinimorpha : Aporrhaidae : Drepanocheilus 100.5 - 93.5 Ma Late/Upper Cretaceous Eunaticina genus Animalia : Mollusca : Gastropoda : Littorinimorpha : Naticidae : Eunaticina 99.6 - 93.5 Ma Late/Upper Cretaceous Euspira genus Animalia : Mollusca : Euspira 99.6 - 93.5 Ma Late/Upper Cretaceous Globularia genus Animalia : Mollusca : Gastropoda : Architaenioglossa : Ampullinidae : Globularia 170.3 - 166.1 Ma Middle Jurassic Perissoptera genus Animalia : Mollusca : Gastropoda : Littorinimorpha : Aporrhaidae : Perissoptera 99.6 - 93.5 Ma Late/Upper Cretaceous Pseudomelania genus Animalia : Mollusca : Gastropoda : Pseudomelaniidae : Pseudomelania 99.6 - 93.5 Ma Late/Upper Cretaceous Turritella genus Animalia : Mollusca : Gastropoda : Turritellidae : Turritella 100.5 - 93.5 Ma Late/Upper Cretaceous Tylostoma genus Animalia : Mollusca : Gastropoda : Littorinimorpha : Tylostomatidae : Tylostoma 170.3 - 166.1 Ma Middle Jurassic Admetopsis genus Animalia : Mollusca : Gastropoda : Neogastropoda : Admetopsis 100.5 - 93.9 Ma Late/Upper Cretaceous Cylichna genus Animalia : Mollusca : Gastropoda : Cephalaspidea : Cylichnidae : Cylichna 99.6 - 93.5 Ma Late/Upper Cretaceous Cylindrobullina genus Animalia : Mollusca : Gastropoda : Cylindrobullinidae : Cylindrobullina 170.3 - 166.1 Ma Middle Jurassic Anisomyon genus Animalia : Mollusca : Gastropoda : Siphonariida : Siphonariidae : Anisomyon 99.6 - 93.5 Ma Late/Upper Cretaceous Owenites genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Melagathiceratidae : Owenites 251.3 - 247.2 Ma Early/Lower Triassic Ammonoidea order Animalia : Mollusca : Cephalopoda : Ammonoidea 100.5 - 93.5 Ma Late/Upper Cretaceous Allocrioceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Anisoceratidae : Allocrioceras 100.5 - 93.5 Ma Late/Upper Cretaceous Borissjakoceras genus Animalia : Mollusca : Cephalopoda : Ammonitida : Binneyitidae : Borissjakoceras 99.6 - 93.5 Ma Late/Upper Cretaceous Euomphaloceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Euomphaloceras 99.6 - 93.5 Ma Late/Upper Cretaceous Kamerunoceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Kamerunoceras 99.6 - 93.5 Ma Late/Upper Cretaceous Metoicoceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Metoicoceras 99.6 - 93.5 Ma Late/Upper Cretaceous Neocardioceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Neocardioceras 99.6 - 93.5 Ma Late/Upper Cretaceous Neocrioceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Diplomoceratidae : Neocrioceras 99.6 - 93.5 Ma Late/Upper Cretaceous Placenticeras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Placenticeratidae : Placenticeras 99.6 - 93.5 Ma Late/Upper Cretaceous Pseudaspidoceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Pseudaspidoceras 99.6 - 93.5 Ma Late/Upper Cretaceous Pseudocalycoceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Pseudocalycoceras 99.6 - 93.5 Ma Late/Upper Cretaceous Sciponoceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Baculitidae : Sciponoceras 99.6 - 93.5 Ma Late/Upper Cretaceous Stomohamites genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Hamitidae : Stomohamites 99.6 - 93.5 Ma Late/Upper Cretaceous Worthoceras genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Scaphitidae : Worthoceras 99.6 - 93.5 Ma Late/Upper Cretaceous Bivalvia class Animalia : Mollusca : Bivalvia 100.5 - 50.3 Ma Phanerozoic Nucula genus Animalia : Mollusca : Bivalvia : Nuculanida : Nuculanidae : Nucula 170.3 - 166.1 Ma Middle Jurassic Nuculana genus Animalia : Mollusca : Bivalvia : Nuculanida : Nuculanidae : Nuculana 99.6 - 93.5 Ma Late/Upper Cretaceous Solemya genus Animalia : Mollusca : Bivalvia : Solemyida : Solemyidae : Solemya 100.5 - 93.5 Ma Late/Upper Cretaceous Grammatodon genus Animalia : Mollusca : Bivalvia : Arcida : Parallelodontidae : Grammatodon 170.3 - 166.1 Ma Middle Jurassic Nemodon genus Animalia : Mollusca : Bivalvia : Arcida : Parallelodontidae : Nemodon 99.6 - 93.5 Ma Late/Upper Cretaceous Mytilus genus Animalia : Mollusca : Bivalvia : Mytilida : Mytilidae : Mytilus 170.3 - 166.1 Ma Middle Jurassic Plesiopinna genus Animalia : Mollusca : Bivalvia : Ostreida : Pinnidae : Plesiopinna 99.6 - 93.5 Ma Late/Upper Cretaceous Anomia genus Animalia : Mollusca : Bivalvia : Pectinida : Anomiidae : Anomia 99.6 - 93.5 Ma Late/Upper Cretaceous Aucellina genus Animalia : Mollusca : Bivalvia : Pectinida : Buchiidae : Aucellina 99.6 - 93.5 Ma Late/Upper Cretaceous Camptonectes genus Animalia : Mollusca : Bivalvia : Pectinida : Pectinidae : Camptonectes 170.3 - 93.5 Ma Mesozoic Ctenostreon genus Animalia : Mollusca : Bivalvia : Limida : Limidae : Ctenostreon 170.3 - 166.1 Ma Middle Jurassic Exogyra genus Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Exogyra 99.6 - 93.5 Ma Late/Upper Cretaceous Gervillia genus Animalia : Mollusca : Bivalvia : Ostreida : Bakevelliidae : Gervillia 99.6 - 93.5 Ma Late/Upper Cretaceous Gryphaeostrea genus Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Gryphaeostrea 99.6 - 93.5 Ma Late/Upper Cretaceous Inoceramus genus Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus 99.6 - 93.5 Ma Late/Upper Cretaceous Isognomon genus Animalia : Mollusca : Bivalvia : Ostreida : Pteriidae : Isognomon 170.3 - 166.1 Ma Middle Jurassic Lima genus Animalia : Mollusca : Bivalvia : Limida : Limidae : Lima 99.6 - 93.5 Ma Late/Upper Cretaceous Mytiloides genus Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Mytiloides 99.6 - 93.5 Ma Late/Upper Cretaceous Ostrea genus Animalia : Mollusca : Bivalvia : Ostreida : Ostreidae : Ostraea 99.6 - 93.5 Ma Late/Upper Cretaceous Phelopteria genus Animalia : Mollusca : Bivalvia : Ostreida : Pteriidae : Phelopteria 99.6 - 93.5 Ma Late/Upper Cretaceous Plagiostoma genus Animalia : Mollusca : Bivalvia : Limida : Limidae : Plagiostoma 170.3 - 166.1 Ma Middle Jurassic Plicatula genus Animalia : Mollusca : Bivalvia : Pectinida : Plicatulidae : Plicatula 170.3 - 93.5 Ma Mesozoic Pseudoptera genus Animalia : Mollusca : Bivalvia : Ostreida : Bakevelliidae : Pseudoptera 99.6 - 93.5 Ma Late/Upper Cretaceous Rhynchostreon genus Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Rhynchostreon 99.6 - 93.5 Ma Late/Upper Cretaceous Syncyclonema genus Animalia : Mollusca : Bivalvia : Pectinida : Entoliidae : Pectinella 99.6 - 93.5 Ma Late/Upper Cretaceous Neoschizodus genus Animalia : Mollusca : Bivalvia : Trigoniida : Myophoriidae : Neoschizodus 251.3 - 247.2 Ma Early/Lower Triassic Trigonia genus Animalia : Mollusca : Bivalvia : Trigoniida : Trigoniidae : Trigonia 170.3 - 166.1 Ma Middle Jurassic Vaugonia genus Animalia : Mollusca : Bivalvia : Trigoniida : Myophorellidae : Vaugonia 170.3 - 166.1 Ma Middle Jurassic Astarte genus Animalia : Mollusca : Bivalvia : Carditida : Astartidae : Astarte 170.3 - 93.5 Ma Mesozoic Cymbophora genus Animalia : Mollusca : Bivalvia : Venerida : Mactridae : Cymbophora 99.6 - 93.5 Ma Late/Upper Cretaceous Geltena genus Animalia : Mollusca : Bivalvia : Venerida : Mactridae : Geltena 99.6 - 93.5 Ma Late/Upper Cretaceous Legumen genus Animalia : Mollusca : Bivalvia : Venerida : Veneridae : Legumen 99.6 - 93.5 Ma Late/Upper Cretaceous Lucina genus Animalia : Mollusca : Bivalvia : Lucinida : Lucinidae : Lucina 170.3 - 93.5 Ma Mesozoic Mactromya genus Animalia : Mollusca : Bivalvia : Lucinida : Mactromyidae : Mactromya 170.3 - 166.1 Ma Middle Jurassic Pronoella genus Animalia : Mollusca : Bivalvia : Venerida : Trapezidae : Pronoella 170.3 - 166.1 Ma Middle Jurassic Quenstedtia genus Animalia : Mollusca : Bivalvia : Cardiida : Quenstedtiidae : Quenstedtia 170.3 - 166.1 Ma Middle Jurassic Sexta genus Animalia : Mollusca : Bivalvia : Lucinida : Mactromyidae : Sexta 99.6 - 93.5 Ma Late/Upper Cretaceous Corbula genus Animalia : Mollusca : Bivalvia : Myida : Corbulidae : Corbula 99.6 - 93.5 Ma Late/Upper Cretaceous Parmicorbula genus Animalia : Mollusca : Bivalvia : Myida : Corbulidae : Parmicorbula 99.6 - 93.5 Ma Late/Upper Cretaceous Liopistha genus Animalia : Mollusca : Bivalvia : Poromyidae : Liopistha 99.6 - 93.5 Ma Late/Upper Cretaceous Permophorus genus Animalia : Mollusca : Bivalvia : Venerida : Kalenteridae : Permophorus 251.3 - 247.2 Ma Early/Lower Triassic Pholadomya genus Animalia : Mollusca : Bivalvia : Pholadomyidae : Pholadomya 99.6 - 93.5 Ma Late/Upper Cretaceous Psilomya genus Animalia : Mollusca : Bivalvia : Poromyidae : Psilomya 99.6 - 93.5 Ma Late/Upper Cretaceous Decapoda order Animalia : Arthropoda : Malacostraca : Decapoda 83.5 - 70.6 Ma Late/Upper Cretaceous Ostracoda class Animalia : Arthropoda : Ostracoda 99.6 - 70.6 Ma Late/Upper Cretaceous Oncousoecia genus Animalia : Bryozoa : Stenolaemata : Cyclostomata : Oncousoeciidae : Oncousoecia 168.3 - 166.1 Ma Middle Jurassic Crinoidea class Animalia : Echinodermata : Crinoidea 170.3 - 166.1 Ma Middle Jurassic Holocrinus genus Animalia : Echinodermata : Crinoidea : Isocrinida : Holocrinidae : Holocrinus 251.3 - 247.2 Ma Early/Lower Triassic Isocrinus genus Animalia : Echinodermata : Isocrinus 168.3 - 166.1 Ma Middle Jurassic Chondrichthyes class Animalia : Chordata : Chondrichthyes 89.3 - 70.6 Ma Late/Upper Cretaceous Hybodus genus Animalia : Chordata : Chondrichthyes : Hybodontiformes : Hybodontidae : Hybodus 89.3 - 85.8 Ma Late/Upper Cretaceous Lissodus genus Animalia : Chordata : Chondrichthyes : Hybodontiformes : Lissodus 89.3 - 85.8 Ma Late/Upper Cretaceous Cantioscyllium genus Animalia : Chordata : Chondrichthyes : Orectolobiformes : Ginglymostomatidae : Cantioscyllium 89.3 - 70.6 Ma Late/Upper Cretaceous Ischyrhiza genus Animalia : Chordata : Chondrichthyes : Sclerorhynchiformes : Sclerorhynchidae : Ischyrhiza 83.5 - 70.6 Ma Late/Upper Cretaceous Squatirhina genus Animalia : Chordata : Chondrichthyes : Orectolobiformes : Orectolobidae : Squatirhina 83.5 - 70.6 Ma Late/Upper Cretaceous Myledaphus genus Animalia : Chordata : Elasmobranchii : Rhinopristiformes : Rhinobatidae : Myledaphus 83.5 - 70.6 Ma Late/Upper Cretaceous Osteichthyes unranked clade Animalia : Chordata : Osteichthyes 99.6 - 37.2 Ma Phanerozoic Acipenseriformes order Animalia : Chordata : Actinopterygii : Acipenseriformes 83.5 - 70.6 Ma Late/Upper Cretaceous Lepisosteus genus Animalia : Chordata : Actinopterygii : Lepisosteiformes : Lepisosteidae : Lepisosteus 89.3 - 70.6 Ma Late/Upper Cretaceous Squamata order Animalia : Chordata : Reptilia : Squamata 89.3 - 85.8 Ma Late/Upper Cretaceous Crocodylia unranked clade Animalia : Chordata : Reptilia : Crocodylia 99.6 - 50.3 Ma Phanerozoic Mammalia class Animalia : Chordata : Mammalia 93.9 - 50.3 Ma Phanerozoic Carnivora order Animalia : Chordata : Mammalia : Carnivora 40.4 - 37.2 Ma Eocene Urodela family Animalia : Chordata : Osteichthyes : Caudata : Urodela 89.8 - 83.5 Ma Late/Upper Cretaceous Batrachosauroididae family Animalia : Chordata : Osteichthyes : Proteida : Batrachosauroididae 100.5 - 89.3 Ma Late/Upper Cretaceous Opisthotriton genus Animalia : Chordata : Osteichthyes : Proteida : Batrachosauroididae : Opisthotriton 85.8 - 70.6 Ma Late/Upper Cretaceous Scapherpetontidae family Animalia : Chordata : Osteichthyes : Caudata : Scapherpetontidae 89.8 - 83.6 Ma Late/Upper Cretaceous Lisserpeton genus Animalia : Chordata : Osteichthyes : Caudata : Scapherpetontidae : Lisserpeton 83.5 - 70.6 Ma Late/Upper Cretaceous Scapherpeton genus Animalia : Chordata : Osteichthyes : Caudata : Scapherpetontidae : Scapherpeton 89.8 - 70.6 Ma Late/Upper Cretaceous Habrosaurus genus Animalia : Chordata : Amphibia : Caudata : Sirenidae : Habrosaurus 85.8 - 83.5 Ma Late/Upper Cretaceous Eopelobates genus Animalia : Chordata : Osteichthyes : Anura : Pelobatidae : Eopelobates 83.5 - 70.6 Ma Late/Upper Cretaceous Theatonius genus Animalia : Chordata : Osteichthyes : Anura : Theatonius 83.5 - 70.6 Ma Late/Upper Cretaceous Baenidae family Animalia : Chordata : Reptilia : Testudines : Baenidae 83.5 - 70.6 Ma Late/Upper Cretaceous Neurankylus genus Animalia : Chordata : Reptilia : Testudines : Baenidae : Neurankylus 83.5 - 70.6 Ma Late/Upper Cretaceous Thescelus genus Animalia : Chordata : Reptilia : Testudines : Baenidae : Thescelus 83.5 - 70.6 Ma Late/Upper Cretaceous Compsemys genus Animalia : Chordata : Reptilia : Testudines : Compsemydidae : Compsemys 83.5 - 70.6 Ma Late/Upper Cretaceous Adocus genus Animalia : Chordata : Reptilia : Testudines : Adocidae : Adocus 83.5 - 70.6 Ma Late/Upper Cretaceous Baptemys genus Animalia : Chordata : Reptilia : Testudines : Dermatemydidae : Baptemys 40.4 - 37.2 Ma Eocene Basilemys genus Animalia : Chordata : Reptilia : Testudines : Nanhsiungchelyidae : Basilemys 83.5 - 70.6 Ma Late/Upper Cretaceous Carettochelyidae family Animalia : Chordata : Reptilia : Testudines : Carettochelyidae 40.4 - 37.2 Ma Eocene Trionychidae family Animalia : Chordata : Reptilia : Testudines : Trionychidae 83.5 - 70.6 Ma Late/Upper Cretaceous Plastomenus genus Animalia : Chordata : Reptilia : Testudines : Trionychidae : Plastomenus 40.4 - 37.2 Ma Eocene Chelydridae family Animalia : Chordata : Reptilia : Testudines : Chelydridae 83.5 - 37.2 Ma Phanerozoic Echmatemys genus Animalia : Chordata : Reptilia : Testudines : Geoemydidae : Echmatemys 40.4 - 37.2 Ma Eocene Lacertilia suborder Animalia : Chordata : Reptilia : Squamata : Lacertilia 99.6 - 93.5 Ma Late/Upper Cretaceous Leptochamops genus Animalia : Chordata : Reptilia : Squamata : Teiidae : Leptochamops 83.5 - 70.6 Ma Late/Upper Cretaceous Contogenys genus Animalia : Chordata : Reptilia : Squamata : Scincidae : Contogenys 83.5 - 70.6 Ma Late/Upper Cretaceous Anguidae family Animalia : Chordata : Reptilia : Squamata : Anguidae 55.8 - 50.3 Ma Eocene Odaxosaurus genus Animalia : Chordata : Reptilia : Squamata : Anguidae : Odaxosaurus 93.9 - 89.8 Ma Late/Upper Cretaceous Exostinus genus Animalia : Chordata : Reptilia : Squamata : Xenosauridae : Exostinus 83.5 - 70.6 Ma Late/Upper Cretaceous Colpodontosaurus genus Animalia : Chordata : Reptilia : Squamata : Necrosauridae : Colpodontosaurus 85.8 - 83.5 Ma Late/Upper Cretaceous Serpentes unranked clade Animalia : Chordata : Reptilia : Squamata : Serpentes 83.5 - 70.6 Ma Late/Upper Cretaceous Coniophis genus Animalia : Chordata : Reptilia : Squamata : Aniliidae : Coniophis 100.5 - 70.6 Ma Late/Upper Cretaceous Alligator genus Animalia : Chordata : Reptilia : Crocodylia : Alligatoridae : Alligator 40.4 - 37.2 Ma Eocene Leidyosuchus genus Animalia : Chordata : Reptilia : Crocodylia : Crocodylidae : Leidyosuchus 83.5 - 70.6 Ma Late/Upper Cretaceous Pterosauria order Animalia : Chordata : Reptilia : Pterosauria 83.5 - 70.6 Ma Late/Upper Cretaceous Theropoda unranked clade Animalia : Chordata : Saurischia : Theropoda 208.5 - 70.6 Ma Mesozoic Ornithomimus genus Animalia : Chordata : Saurischia : Avetheropoda : Ornithomimidae : Ornithomimus 83.5 - 70.6 Ma Late/Upper Cretaceous Dromaeosauridae family Animalia : Chordata : Reptilia : Dinosauria : Dromaeosauridae 85.8 - 70.6 Ma Late/Upper Cretaceous Tyrannosauridae family Animalia : Chordata : Reptilia : Dinosauria : Tyrannosauridae 83.5 - 70.6 Ma Late/Upper Cretaceous Hypsilophodontidae family Animalia : Chordata : Reptilia : Dinosauria : Hypsilophodontidae 83.5 - 70.6 Ma Late/Upper Cretaceous Hadrosauridae family Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae 83.5 - 66 Ma Late/Upper Cretaceous Ankylosauridae family Animalia : Chordata : Reptilia : Dinosauria : Ankylosauridae 83.5 - 70.6 Ma Late/Upper Cretaceous Ceratopsia unranked clade Animalia : Chordata : Ornithischia : Ceratopsia 83.5 - 70.6 Ma Late/Upper Cretaceous Triceratops genus Animalia : Chordata : Reptilia : Dinosauria : Ceratopsidae : Triceratops 70.6 - 66 Ma Late/Upper Cretaceous Neornithes subclass Animalia : Chordata : Aves : Neornithes 40.4 - 37.2 Ma Eocene Multituberculata order Animalia : Chordata : Mammalia : Multituberculata 100.5 - 70.6 Ma Late/Upper Cretaceous Bryceomys genus Animalia : Chordata : Mammalia : Taeniolabidae : Bryceomys 100.5 - 70.6 Ma Late/Upper Cretaceous Cedaromys genus Animalia : Chordata : Mammalia : Cedaromys 89.3 - 70.6 Ma Late/Upper Cretaceous Cimexomys genus Animalia : Chordata : Mammalia : Taeniolabidae : Cimexomys 83.5 - 70.6 Ma Late/Upper Cretaceous Dakotamys genus Animalia : Chordata : Mammalia : Taeniolabidae : Dakotamys 100.5 - 93.9 Ma Late/Upper Cretaceous Paracimexomys genus Animalia : Chordata : Mammalia : Taeniolabidae : Paracimexomys 100.5 - 70.6 Ma Late/Upper Cretaceous Mesodma genus Animalia : Chordata : Mammalia : Ptilodontidae : Mesodma 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolodontidae family Animalia : Chordata : Mammalia : Cimolodontidae 100.5 - 93.5 Ma Late/Upper Cretaceous Cimolodon genus Animalia : Chordata : Mammalia : Cimolodontidae : Cimolodon 83.5 - 70.6 Ma Late/Upper Cretaceous Taeniolabidoidea superfamily Animalia : Chordata : Mammalia : Multituberculata : Taeniolabidoidea 93.9 - 89.8 Ma Late/Upper Cretaceous Meniscoessus genus Animalia : Chordata : Mammalia : Taeniolabididae : Meniscoessus 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolomyidae family Animalia : Chordata : Mammalia : Cimolomyidae 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolomys genus Animalia : Chordata : Mammalia : Cimolomyidae : Cimolomys 83.5 - 70.6 Ma Late/Upper Cretaceous Theria subclass Animalia : Chordata : Mammalia : Theria 100.5 - 89.3 Ma Late/Upper Cretaceous Symmetrodonta infraclass Animalia : Chordata : Mammalia : Symmetrodonta 93.9 - 70.6 Ma Late/Upper Cretaceous Spalacotheriidae family Animalia : Chordata : Mammalia : Spalacotheriidae 99.6 - 93.5 Ma Late/Upper Cretaceous Symmetrodontoides genus Animalia : Chordata : Mammalia : Spalacotheriidae : Symmetrodontoides 83.5 - 70.6 Ma Late/Upper Cretaceous Dakotadens genus Animalia : Chordata : Mammalia : Holoclemensiidae : Dakotadens 100.5 - 93.9 Ma Late/Upper Cretaceous Deltatheridiidae family Animalia : Chordata : Mammalia : Deltatheridiidae 93.5 - 89.3 Ma Late/Upper Cretaceous Picopsis genus Animalia : Chordata : Mammalia : Picopsidae : Picopsis 83.5 - 70.6 Ma Late/Upper Cretaceous Marsupialia family Animalia : Chordata : Mammalia : Marsupialia 93.9 - 89.8 Ma Late/Upper Cretaceous Aenigmadelphys genus Animalia : Chordata : Mammalia : Asiatheriidae : Aenigmadelphys 83.5 - 70.6 Ma Late/Upper Cretaceous Anchistodelphys genus Animalia : Chordata : Mammalia : Asiatheriidae : Anchistodelphys 83.5 - 70.6 Ma Late/Upper Cretaceous Iqualadelphis genus Animalia : Chordata : Mammalia : Didelphimorphia : Sparassocynidae : Iqualadelphis 83.5 - 70.6 Ma Late/Upper Cretaceous Iugomortiferum genus Animalia : Chordata : Mammalia : Asiatheriidae : Iugomortiferum 83.5 - 70.6 Ma Late/Upper Cretaceous Alphadon genus Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Alphadon 100.5 - 70.6 Ma Late/Upper Cretaceous Peratherium genus Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Peratherium 55.8 - 50.3 Ma Eocene Protalphadon genus Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Protalphadon 100.5 - 70.6 Ma Late/Upper Cretaceous Turgidodon genus Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Turgidodon 83.5 - 70.6 Ma Late/Upper Cretaceous Varalphadon genus Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Varalphadon 83.5 - 70.6 Ma Late/Upper Cretaceous Pediomys genus Animalia : Chordata : Mammalia : Pediomyidae : Pediomys 83.5 - 70.6 Ma Late/Upper Cretaceous Stagodontidae family Animalia : Chordata : Mammalia : Didelphimorphia : Stagodontidae 93.9 - 83.6 Ma Late/Upper Cretaceous Gypsonictops genus Animalia : Chordata : Mammalia : Pilosa : Gypsonictopidae : Gypsonictops 83.5 - 70.6 Ma Late/Upper Cretaceous Paranyctoides genus Animalia : Chordata : Mammalia : Soricomorpha : Nyctitheriidae : Paranyctoides 83.5 - 70.6 Ma Late/Upper Cretaceous Griphomys genus Animalia : Chordata : Mammalia : Rodentia : Gliridae : Griphomys 40.4 - 37.2 Ma Eocene Orelladjidaumo genus Animalia : Chordata : Mammalia : Rodentia : Eomyidae : Orelladjidaumo 40.4 - 37.2 Ma Eocene Simimys genus Animalia : Chordata : Mammalia : Rodentia : Simimyidae : Simimys 40.4 - 37.2 Ma Eocene Aepinacodon genus Animalia : Chordata : Mammalia : Artiodactyla : Anthracotheriidae : Aepinacodon 40.4 - 37.2 Ma Eocene Heptacodon genus Animalia : Chordata : Mammalia : Artiodactyla : Anthracotheriidae : Heptacodon 40.4 - 37.2 Ma Eocene Brontotheriidae family Animalia : Chordata : Mammalia : Perissodactyla : Brontotheriidae 40.4 - 37.2 Ma Eocene Aenigmadelphys archeri species Animalia : Chordata : Mammalia : Asiatheriidae : Aenigmadelphys : Aenigmadelphys archeri 83.5 - 70.6 Ma Late/Upper Cretaceous Alphadon attaragos species Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Alphadon : Alphadon attaragos 83.5 - 70.6 Ma Late/Upper Cretaceous Eoalphadon clemensi species Animalia : Chordata : Mammalia : Didelphimorphia : Alphadontidae : Eoalphadon : Eoalphadon clemensi 100.5 - 70.6 Ma Late/Upper Cretaceous Alphadon halleyi species Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Alphadon : Alphadon halleyi 83.5 - 70.6 Ma Late/Upper Cretaceous Eoalphadon lillegraveni species Animalia : Chordata : Mammalia : Didelphimorphia : Alphadontidae : Eoalphadon : Eoalphadon lillegraveni 100.5 - 93.9 Ma Late/Upper Cretaceous Alphadon marshi species Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Alphadon : Alphadon marshi 83.5 - 70.6 Ma Late/Upper Cretaceous Turgidodon russelli species Animalia : Chordata : Mammalia : Didelphimorphia : Alphadontidae : Turgidodon : Turgidodon russelli 83.5 - 70.6 Ma Late/Upper Cretaceous Alphadon sahnii species Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Alphadon : Alphadon sahnii 83.5 - 70.6 Ma Late/Upper Cretaceous Anchistodelphys archibaldi species Animalia : Chordata : Mammalia : Asiatheriidae : Anchistodelphys : Anchistodelphys archibaldi 83.5 - 70.6 Ma Late/Upper Cretaceous Anchistodelphys delicatus species Animalia : Chordata : Mammalia : Asiatheriidae : Anchistodelphys : Anchistodelphys delicatus 93.5 - 89.3 Ma Late/Upper Cretaceous Avitotherium utahensis species Animalia : Chordata : Mammalia : Zhelestidae : Avitotherium : Avitotherium utahensis 83.5 - 70.6 Ma Late/Upper Cretaceous Bryceomys fumosus species Animalia : Chordata : Mammalia : Taeniolabidae : Bryceomys : Bryceomys fumosus 93.9 - 89.3 Ma Late/Upper Cretaceous Bryceomys hadrosus species Animalia : Chordata : Mammalia : Taeniolabidae : Bryceomys : Bryceomys hadrosus 93.9 - 89.3 Ma Late/Upper Cretaceous Cimexomys antiquus species Animalia : Chordata : Mammalia : Taeniolabidae : Cimexomys : Cimexomys antiquus 83.5 - 70.6 Ma Late/Upper Cretaceous Cimexomys gregoryi species Animalia : Chordata : Mammalia : Taeniolabidae : Cimexomys : Cimexomys gregoryi 83.5 - 70.6 Ma Late/Upper Cretaceous Cimexomys judithae species Animalia : Chordata : Mammalia : Taeniolabidae : Paracimexomys : Cimexomys judithae 83.5 - 70.6 Ma Late/Upper Cretaceous Paracimexomys magnus species Animalia : Chordata : Mammalia : Multituberculata : Paracimexomys : Paracimexomys magnus 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolodon electus species Animalia : Chordata : Mammalia : Cimolodontidae : Cimolodon : Cimolodon electus 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolodon nitidus species Animalia : Chordata : Mammalia : Cimolodontidae : Cimolodon : Cimolodon nitidus 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolodon similis species Animalia : Chordata : Mammalia : Cimolodontidae : Cimolodon : Cimolodon similis 100.5 - 70.6 Ma Late/Upper Cretaceous Cimolomys clarki species Animalia : Chordata : Mammalia : Cimolomyidae : Cimolomys : Cimolomys clarki 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolomys milliensis species Animalia : Chordata : Mammalia : Cimolomyidae : Cimolomys : Cimolomys milliensis 83.5 - 70.6 Ma Late/Upper Cretaceous Dakotadens morrowi species Animalia : Chordata : Mammalia : Holoclemensiidae : Dakotadens : Dakotadens morrowi 100.5 - 93.9 Ma Late/Upper Cretaceous Dakotamys malcolmi species Animalia : Chordata : Mammalia : Taeniolabidae : Dakotamys : Dakotamys malcolmi 100.5 - 93.5 Ma Late/Upper Cretaceous Knightomys minor species Animalia : Chordata : Mammalia : Rodentia : Sciuravidae : Knightomys : Knightomys minor 55.8 - 50.3 Ma Eocene Mesodma formosa species Animalia : Chordata : Mammalia : Multituberculata : Neoplagiaulacidae : Mesodma : Mesodma formosa 83.5 - 70.6 Ma Late/Upper Cretaceous Iqualadelphis lactea species Animalia : Chordata : Mammalia : Didelphimorphia : Sparassocynidae : Iqualadelphis : Iqualadelphis lactea 83.5 - 70.6 Ma Late/Upper Cretaceous Iugomortiferum thoringtoni species Animalia : Chordata : Mammalia : Asiatheriidae : Iugomortiferum : Iugomortiferum thoringtoni 83.5 - 70.6 Ma Late/Upper Cretaceous Meniscoessus intermedius species Animalia : Chordata : Mammalia : Taeniolabididae : Meniscoessus : Meniscoessus intermedius 83.5 - 70.6 Ma Late/Upper Cretaceous Mesodma hensleighi species Animalia : Chordata : Mammalia : Ptilodontidae : Mesodma : Mesodma hensleighi 83.5 - 70.6 Ma Late/Upper Cretaceous Mesodma thompsoni species Animalia : Chordata : Mammalia : Ptilodontidae : Mesodma : Mesodma thompsoni 83.5 - 70.6 Ma Late/Upper Cretaceous Knightomys reginensis species Animalia : Chordata : Mammalia : Rodentia : Sciuravidae : Knightomys : Knightomys reginensis 55.8 - 50.3 Ma Eocene Metanoiamys lacus species Animalia : Chordata : Mammalia : Rodentia : Eomyidae : Metanoiamys : Metanoiamys lacus 40.4 - 37.2 Ma Eocene Paracimexomys robisoni species Animalia : Chordata : Mammalia : Taeniolabidae : Paracimexomys : Paracimexomys robisoni 100.5 - 89.3 Ma Late/Upper Cretaceous Paradjidaumo alberti species Animalia : Chordata : Mammalia : Rodentia : Eomyidae : Paradjidaumo : Paradjidaumo alberti 40.4 - 37.2 Ma Eocene Pariadens kirklandi species Animalia : Chordata : Mammalia : Didelphimorphia : Stagodontidae : Pariadens : Pariadens kirklandi 100.5 - 93.5 Ma Late/Upper Cretaceous Apistodon exiguus species Animalia : Chordata : Mammalia : Didelphimorphia : Apistodon : Apistodon exiguus 83.5 - 70.6 Ma Late/Upper Cretaceous Peradectes chesteri species Animalia : Chordata : Mammalia : Peradectidae : Peradectes : Peradectes chesteri 55.8 - 50.3 Ma Eocene Herpetotherium innominatum species Animalia : Chordata : Mammalia : Marsupialia : Herpetotheriidae : Herpetotherium : Herpetotherium innominatum 40.4 - 37.2 Ma Eocene Varalphadon crebreforme species Animalia : Chordata : Mammalia : Didelphimorphia : Varalphadon : Varalphadon crebreforme 83.5 - 70.6 Ma Late/Upper Cretaceous Varalphadon wahweapensis species Animalia : Chordata : Mammalia : Didelphimorphia : Varalphadon : Varalphadon wahweapensis 83.5 - 70.6 Ma Late/Upper Cretaceous Spalacotheridium mckennai species Animalia : Chordata : Mammalia : Spalacotheriidae : Spalacotheridium : Spalacotheridium mckennai 93.9 - 89.8 Ma Late/Upper Cretaceous Turgidodon lillegraveni species Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Turgidodon : Turgidodon lillegraveni 83.5 - 70.6 Ma Late/Upper Cretaceous Turgidodon madseni species Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Turgidodon : Turgidodon madseni 83.5 - 70.6 Ma Late/Upper Cretaceous Zygiocuspis goldingi species Animalia : Chordata : Mammalia : Holoclemensiidae : Zygiocuspis : Zygiocuspis goldingi 83.5 - 70.6 Ma Late/Upper Cretaceous Chasmosaurinae subfamily Animalia : Chordata : Ornithischia : Ceratopsidae : Chasmosaurinae 83.5 - 70.6 Ma Late/Upper Cretaceous Neoceratopsia infraorder Animalia : Chordata : Ornithischia : Neoceratopsia 85.8 - 70.6 Ma Late/Upper Cretaceous Dinosauria order Animalia : Chordata : Reptilia : Dinosauria 201.3 - 70.6 Ma Mesozoic Anomoepodidae family Animalia : Chordata : Reptilia : Dinosauria : Anomoepodidae 201.3 - 199.3 Ma Early Jurassic Gryposaurus genus Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae : Gryposaurus 83.5 - 70.6 Ma Late/Upper Cretaceous Anguimorpha suborder Animalia : Chordata : Reptilia : Squamata : Anguimorpha 100.5 - 70.6 Ma Late/Upper Cretaceous Enantiornithes subclass Animalia : Chordata : Aves : Enantiornithes 83.5 - 70.6 Ma Late/Upper Cretaceous Saurolophinae subfamily Animalia : Chordata : Ornithischia : Hadrosauridae : Saurolophinae 83.5 - 70.6 Ma Late/Upper Cretaceous Crocodyliformes suborder Animalia : Chordata : Reptilia : Eosuchia : Crocodyliformes 83.5 - 70.6 Ma Late/Upper Cretaceous Crocodylomorpha unranked clade Animalia : Chordata : Reptilia : Eosuchia : Crocodylomorpha 190.8 - 174.1 Ma Jurassic Chamops segnis species Animalia : Chordata : Reptilia : Squamata : Teiidae : Chamops : Chamops segnis 93.9 - 70.6 Ma Late/Upper Cretaceous Plantae kingdom Plantae 83.5 - 70.6 Ma Late/Upper Cretaceous Elasmobranchii class Animalia : Chordata : Elasmobranchii 85.8 - 70.6 Ma Late/Upper Cretaceous Tracheophyta phylum Plantae : Tracheophyta 83.5 - 70.6 Ma Late/Upper Cretaceous Magnoliopsida class Plantae : Tracheophyta : Magnoliopsida 100.5 - 93.9 Ma Late/Upper Cretaceous Rhynchosauroides genus Animalia : Chordata : Reptilia : Rhynchocephalia : Rhynchosauroides 251.3 - 247.2 Ma Early/Lower Triassic Testudines order Animalia : Chordata : Reptilia : Testudines 89.3 - 70.6 Ma Late/Upper Cretaceous Amia genus Animalia : Chordata : Actinopteri : Amiiformes : Amiidae : Amia 83.5 - 37.2 Ma Phanerozoic Platynota infraorder Animalia : Chordata : Reptilia : Squamata : Platynota 100.5 - 70.6 Ma Late/Upper Cretaceous Scincomorpha infraorder Animalia : Chordata : Reptilia : Squamata : Scincomorpha 100.5 - 70.6 Ma Late/Upper Cretaceous Scincoidea superfamily Animalia : Chordata : Reptilia : Squamata : Scincoidea 100.5 - 70.6 Ma Late/Upper Cretaceous Tyrannosauroidea superfamily Animalia : Chordata : Saurischia : Avetheropoda : Tyrannosauroidea 83.5 - 70.6 Ma Late/Upper Cretaceous Arcidae family Animalia : Mollusca : Bivalvia : Arcida : Arcidae 99.6 - 93.5 Ma Late/Upper Cretaceous Callistina genus Animalia : Mollusca : Bivalvia : Venerida : Veneridae : Callistina 99.6 - 93.5 Ma Late/Upper Cretaceous Cardioidea superfamily Animalia : Mollusca : Bivalvia : Cardiida : Cardioidea 100.5 - 93.9 Ma Late/Upper Cretaceous Cucullaea (Idonearca) subgenus Animalia : Mollusca : Bivalvia : Arcida : Cucullaeidae : Cucullaea : Cucullaea (Idonearca) 170.3 - 166.1 Ma Middle Jurassic Inoceramidae family Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae 100.5 - 93.5 Ma Late/Upper Cretaceous Nymphalucina linearia species Animalia : Mollusca : Bivalvia : Lucinida : Lucinidae : Nymphalucina : Nymphalucina linearia 99.6 - 93.5 Ma Late/Upper Cretaceous Nerineidae family Animalia : Mollusca : Gastropoda : Nerineidae 170.3 - 166.1 Ma Middle Jurassic Neritidae family Animalia : Mollusca : Gastropoda : Cycloneritida : Neritidae 170.3 - 166.1 Ma Middle Jurassic Ostreidae family Animalia : Mollusca : Bivalvia : Ostreida : Ostreidae 100.5 - 93.5 Ma Late/Upper Cretaceous Protocardia genus Animalia : Mollusca : Bivalvia : Cardiida : Cardiidae : Protocardia 99.6 - 93.5 Ma Late/Upper Cretaceous Pycnodonte genus Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Pycnodonte 99.6 - 93.5 Ma Late/Upper Cretaceous Trochoidea superfamily Animalia : Mollusca : Gastropoda : Trochoidea 170.3 - 166.1 Ma Middle Jurassic Unionidae family Animalia : Mollusca : Bivalvia : Unionida : Unionidae 199.3 - 50.3 Ma Phanerozoic Lepisosteidae family Animalia : Chordata : Actinopterygii : Lepisosteiformes : Lepisosteidae 83.5 - 37.2 Ma Phanerozoic Elopidae family Animalia : Chordata : Actinopterygii : Elopiformes : Elopidae 83.5 - 70.6 Ma Late/Upper Cretaceous Esocidae family Animalia : Chordata : Actinopteri : Esociformes : Esocidae 40.4 - 37.2 Ma Eocene Albanerpetontidae family Animalia : Chordata : Amphibia : Gymnophiona : Albanerpetontidae 100.5 - 70.6 Ma Late/Upper Cretaceous Naomichelys genus Animalia : Chordata : Reptilia : Testudines : Solemydidae : Naomichelys 89.3 - 70.6 Ma Late/Upper Cretaceous Odaxosaurus priscus species Animalia : Chordata : Reptilia : Squamata : Anguidae : Odaxosaurus : Odaxosaurus priscus 83.5 - 70.6 Ma Late/Upper Cretaceous Odaxosaurus piger species Animalia : Chordata : Reptilia : Squamata : Anguidae : Odaxosaurus : Odaxosaurus piger 83.5 - 70.6 Ma Late/Upper Cretaceous Contogenys sloani species Animalia : Chordata : Reptilia : Squamata : Scincidae : Contogenys : Contogenys sloani 83.5 - 70.6 Ma Late/Upper Cretaceous Scotiophryne pustulosa species Animalia : Chordata : Osteichthyes : Anura : Scotiophryne : Scotiophryne pustulosa 85.8 - 70.6 Ma Late/Upper Cretaceous Compsemys victa species Animalia : Chordata : Reptilia : Testudines : Compsemydidae : Compsemys : Compsemys victa 83.5 - 70.6 Ma Late/Upper Cretaceous Parasaniwa wyomingensis species Animalia : Chordata : Reptilia : Squamata : Varanidae : Parasaniwa : Parasaniwa wyomingensis 83.5 - 70.6 Ma Late/Upper Cretaceous Chirotherium genus Animalia : Chordata : Reptilia : Chirotheriidae : Chirotherium 251.3 - 247.2 Ma Early/Lower Triassic Otozoum genus Animalia : Chordata : Saurischia : Otozoidae : Otozoum 190.8 - 174.1 Ma Jurassic Grallator (Eubrontes) subgenus Animalia : Chordata : Saurischia : Eubrontidae : Grallator (Eubrontes) 208.5 - 182.7 Ma Mesozoic Parasaurolophus cyrtocristatus species Animalia : Chordata : Ornithischia : Hadrosauridae : Parasaurolophus : Parasaurolophus cyrtocristatus 83.5 - 70.6 Ma Late/Upper Cretaceous Anomoepus genus Animalia : Chordata : Ornithischia : Moyenisauropodidae : Anomoepus 182.7 - 174.1 Ma Jurassic Vertebrata subphylum Animalia : Chordata : Vertebrata 55.8 - 50.3 Ma Eocene Brontopodus genus Animalia : Chordata : Saurischia : Brontopodus 164.7 - 161.2 Ma Jurassic Rhinoclemmys genus Animalia : Chordata : Reptilia : Testudines : Geoemydidae : Rhinoclemmys 40.4 - 37.2 Ma Eocene Batagurinae subfamily Animalia : Chordata : Reptilia : Testudines : Emydidae : Batagurinae 40.4 - 37.2 Ma Eocene Apalone genus Animalia : Chordata : Reptilia : Testudines : Trionychidae : Apalone 40.4 - 37.2 Ma Eocene Aspideretoides genus Animalia : Chordata : Reptilia : Testudines : Trionychidae : Aspideretoides 83.5 - 70.6 Ma Late/Upper Cretaceous Actinopterygii class Animalia : Chordata : Actinopterygii 55.8 - 50.3 Ma Eocene Boreosphenida unranked clade Animalia : Chordata : Mammalia : Boreosphenida 99.6 - 93.5 Ma Late/Upper Cretaceous Alphadontidae family Animalia : Chordata : Mammalia : Didelphimorphia : Alphadontidae 100.5 - 70.6 Ma Late/Upper Cretaceous Helopanoplia genus Animalia : Chordata : Reptilia : Testudines : Trionychidae : Helopanoplia 83.5 - 70.6 Ma Late/Upper Cretaceous Squatirhina americana species Animalia : Chordata : Chondrichthyes : Orectolobiformes : Orectolobidae : Squatirhina : Squatirhina americana 83.5 - 70.6 Ma Late/Upper Cretaceous Albanerpeton nexuosus species Animalia : Chordata : Amphibia : Gymnophiona : Albanerpetontidae : Albanerpeton : Albanerpeton nexuosus 100.5 - 70.6 Ma Late/Upper Cretaceous Leptochamops denticulatus species Animalia : Chordata : Reptilia : Squamata : Chamopsiidae : Leptochamops : Leptochamops denticulatus 83.5 - 70.6 Ma Late/Upper Cretaceous Denazinemys nodosa species Animalia : Chordata : Reptilia : Testudines : Baenidae : Denazinemys : Denazinemys nodosa 83.5 - 70.6 Ma Late/Upper Cretaceous Boremys grandis species Animalia : Chordata : Reptilia : Testudines : Baenidae : Boremys : Boremys grandis 83.5 - 70.6 Ma Late/Upper Cretaceous Basilemys nobilis species Animalia : Chordata : Reptilia : Testudines : Nanhsiungchelyidae : Basilemys : Basilemys nobilis 83.5 - 70.6 Ma Late/Upper Cretaceous Megalosauripus genus Animalia : Chordata : Saurischia : Eubrontidae : Megalosauripus 164.7 - 161.2 Ma Jurassic Chartronella genus Animalia : Mollusca : Gastropoda : Paraturbinidae : Chartronella 251.3 - 247.2 Ma Early/Lower Triassic Kayentapus genus Animalia : Chordata : Saurischia : Kayentapus 190.8 - 174.1 Ma Jurassic Meniscognathus altmani species Animalia : Chordata : Reptilia : Squamata : Teiidae : Meniscognathus : Meniscognathus altmani 83.5 - 70.6 Ma Late/Upper Cretaceous Litakis gilmorei species Animalia : Chordata : Reptilia : Squamata : Litakis : Litakis gilmorei 83.5 - 70.6 Ma Late/Upper Cretaceous Hagryphus giganteus species Animalia : Chordata : Saurischia : Avetheropoda : Caenagnathidae : Hagryphus : Hagryphus giganteus 83.5 - 70.6 Ma Late/Upper Cretaceous Modiolus genus Animalia : Mollusca : Bivalvia : Mytilida : Mytilidae : Modiolus 170.3 - 166.1 Ma Middle Jurassic Selachii unranked clade Animalia : Chordata : Chondrichthyes : Selachii 93.9 - 89.8 Ma Late/Upper Cretaceous Hadrosauropodus genus Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae : Hadrosauropodus 83.5 - 70.6 Ma Late/Upper Cretaceous Aquiladelphis laurae species Animalia : Chordata : Mammalia : Pediomyidae : Aquiladelphis : Aquiladelphis laurae 83.5 - 70.6 Ma Late/Upper Cretaceous Cimolodon wardi species Animalia : Chordata : Mammalia : Cimolodontidae : Cimolodon : Cimolodon wardi 83.5 - 70.6 Ma Late/Upper Cretaceous Neurankylus baueri species Animalia : Chordata : Reptilia : Testudines : Baenidae : Neurankylus : Neurankylus baueri 83.5 - 70.6 Ma Late/Upper Cretaceous Catostomidae family Animalia : Chordata : Actinopterygii : Cypriniformes : Catostomidae 40.4 - 37.2 Ma Eocene Nuculoidea superfamily Animalia : Mollusca : Bivalvia : Nuculida : Nuculoidea 100.5 - 93.9 Ma Late/Upper Cretaceous Chondrites genus Chondrites 99.6 - 93.5 Ma Late/Upper Cretaceous Planolites genus Animalia : Planolites 99.6 - 93.5 Ma Late/Upper Cretaceous Thalassinoides genus Thalassinoides 99.6 - 93.5 Ma Late/Upper Cretaceous Autarchoglossa suborder Animalia : Chordata : Reptilia : Squamata : Autarchoglossa 85.8 - 83.5 Ma Late/Upper Cretaceous Percopsiformes order Animalia : Chordata : Actinopterygii : Percopsiformes 55.8 - 50.3 Ma Eocene Helaletidae family Animalia : Chordata : Mammalia : Perissodactyla : Helaletidae 40.4 - 37.2 Ma Eocene Osteocallis mandibulus species Osteocallis : Osteocallis mandibulus 83.5 - 70.6 Ma Late/Upper Cretaceous Peradectidae family Animalia : Chordata : Mammalia : Didelphimorphia : Peradectidae 89.8 - 83.6 Ma Late/Upper Cretaceous Anura order Animalia : Chordata : Osteichthyes : Anura 100.5 - 50.3 Ma Phanerozoic Goniobasis genus Animalia : Mollusca : Gastropoda : Pleuroceridae : Goniobasis 83.6 - 72.1 Ma Late/Upper Cretaceous Brachauchenius lucasi species Animalia : Chordata : Reptilia : Pliosauridae : Brachauchenius : Brachauchenius lucasi 93.5 - 89.3 Ma Late/Upper Cretaceous Trinacromerum bentonianum species Animalia : Chordata : Reptilia : Polycotylidae : Trinacromerum : Trinacromerum bentonianum 99.6 - 93.5 Ma Late/Upper Cretaceous Dicothodon cifellii species Animalia : Chordata : Reptilia : Squamata : Polyglyphanodontidae : Dicothodon : Dicothodon cifellii 93.5 - 89.3 Ma Late/Upper Cretaceous Peneteius saueri species Animalia : Chordata : Reptilia : Squamata : Chamopsiidae : Peneteius : Peneteius saueri 83.5 - 70.6 Ma Late/Upper Cretaceous Protogusarella smithi species Animalia : Brachiopoda : Rhynchonellata : Terebratulida : Gusarellidae : Protogusarella : Protogusarella smithi 251.3 - 247.2 Ma Early/Lower Triassic Testudinata unranked clade Animalia : Chordata : Reptilia : Testudinata 83.5 - 70.6 Ma Late/Upper Cretaceous Gryposaurus monumentensis species Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae : Gryposaurus : Gryposaurus monumentensis 83.5 - 70.6 Ma Late/Upper Cretaceous Tripennaculus eatoni species Animalia : Chordata : Reptilia : Squamata : Chamopsiidae : Tripennaculus : Tripennaculus eatoni 83.5 - 70.6 Ma Late/Upper Cretaceous Meniscognathus molybrochoros species Animalia : Chordata : Reptilia : Squamata : Teiidae : Meniscognathus : Meniscognathus molybrochoros 83.5 - 70.6 Ma Late/Upper Cretaceous Ictaluridae family Animalia : Chordata : Actinopteri : Siluriformes : Ictaluridae 40.4 - 37.2 Ma Eocene Albanerpeton galaktion species Animalia : Chordata : Amphibia : Gymnophiona : Albanerpetontidae : Albanerpeton : Albanerpeton galaktion 83.5 - 70.6 Ma Late/Upper Cretaceous Patulopora cutleri species Animalia : Bryozoa : Stenolaemata : Cyclostomatida : Multisparsidae : Patulopora : Patulopora cutleri 168.3 - 166.1 Ma Middle Jurassic Campeloma genus Animalia : Mollusca : Gastropoda : Architaenioglossa : Viviparidae : Campeloma 83.6 - 72.1 Ma Late/Upper Cretaceous Calycoceras (Calycoceras) naviculare species Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Calycoceras : Calycoceras (Calycoceras) naviculare 99.6 - 93.5 Ma Late/Upper Cretaceous Mammites nodosoides species Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Mammites : Mammites nodosoides 99.6 - 89.3 Ma Late/Upper Cretaceous Brasilichnium genus Animalia : Chordata : Osteichthyes : Cotylosauria : Chelichnopodidae : Brasilichnium 190.8 - 174.1 Ma Jurassic Obnixia thaynesiana species Animalia : Brachiopoda : Rhynchonellata : Terebratulida : Notothyrididae : Obnixia : Obnixia thaynesiana 251.3 - 247.2 Ma Early/Lower Triassic Bakevellia exporrecta species Animalia : Mollusca : Bivalvia : Ostreida : Bakevelliidae : Bakevellia : Bakevellia exporrecta 251.3 - 247.2 Ma Early/Lower Triassic Inoceramus albertensis species Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : Inoceramus albertensis 89.3 - 85.8 Ma Late/Upper Cretaceous Placenticeras cumminsi species Animalia : Mollusca : Cephalopoda : Ammonitida : Placenticeratidae : Placenticeras : Placenticeras cumminsi 100.5 - 93.9 Ma Late/Upper Cretaceous Metoicoceras geslinianum species Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Metoicoceras : Metoicoceras geslinianum 100.5 - 93.5 Ma Late/Upper Cretaceous Promyalina putiatinensis species Animalia : Mollusca : Bivalvia : Myalinida : Myalinidae : Promyalina : Promyalina putiatinensis 251.3 - 247.2 Ma Early/Lower Triassic Hemiprionites genus Animalia : Mollusca : Cephalopoda : Ammonoidea : Prionitidae : Hemiprionites 251.3 - 247.2 Ma Early/Lower Triassic Melvius chauliodous species Animalia : Chordata : Actinopteri : Amiiformes : Amiidae : Melvius : Melvius chauliodous 83.5 - 70.6 Ma Late/Upper Cretaceous Nothronychus graffami species Animalia : Chordata : Saurischia : Avetheropoda : Therizinosauridae : Nothronychus : Nothronychus graffami 99.6 - 89.3 Ma Late/Upper Cretaceous Rhinobatoidea superfamily Animalia : Chordata : Chondrichthyes : Batoidea : Rhinobatoidea 89.3 - 85.8 Ma Late/Upper Cretaceous Mesostoma genus Mesostoma 99.6 - 93.5 Ma Late/Upper Cretaceous Albanerpeton cifellii species Animalia : Chordata : Amphibia : Gymnophiona : Albanerpetontidae : Albanerpeton : Albanerpeton cifellii 93.5 - 89.3 Ma Late/Upper Cretaceous Albanerpeton gracilis species Animalia : Chordata : Amphibia : Gymnophiona : Albanerpetontidae : Albanerpeton : Albanerpeton gracilis 83.5 - 70.6 Ma Late/Upper Cretaceous Palaeoscincosaurus pharkidodon species Animalia : Chordata : Reptilia : Squamata : Scincidae : Palaeoscincosaurus : Palaeoscincosaurus pharkidodon 83.5 - 70.6 Ma Late/Upper Cretaceous Utahgenys genus Animalia : Chordata : Reptilia : Squamata : Contogeniidae : Utahgenys 100.5 - 93.9 Ma Late/Upper Cretaceous Utahgenys evansi species Animalia : Chordata : Reptilia : Squamata : Contogeniidae : Utahgenys : Utahgenys evansi 93.9 - 89.8 Ma Late/Upper Cretaceous Echinoidea class Animalia : Echinodermata : Echinoidea 170.3 - 166.1 Ma Middle Jurassic Meekoceras gracilitatis species Animalia : Mollusca : Cephalopoda : Ammonoidea : Prionitidae : Meekoceras : Meekoceras gracilitatis 251.3 - 247.2 Ma Early/Lower Triassic Ostrea (Liostrea) subgenus Animalia : Mollusca : Bivalvia : Ostreida : Ostreidae : Ostrea : Ostrea (Liostrea) 170.3 - 166.1 Ma Middle Jurassic Palmulasaurus quadratus species Animalia : Chordata : Reptilia : Sauropterygia : Polycotylidae : Palmulasaurus : Palmulasaurus quadratus 93.5 - 89.3 Ma Late/Upper Cretaceous Eopolycotylus rankini species Animalia : Chordata : Reptilia : Polycotylidae : Eopolycotylus : Eopolycotylus rankini 99.6 - 89.3 Ma Late/Upper Cretaceous Diabloceratops genus Animalia : Chordata : Ornithischia : Ceratopsidae : Diabloceratops 83.5 - 70.6 Ma Late/Upper Cretaceous Diabloceratops eatoni species Animalia : Chordata : Ornithischia : Ceratopsidae : Diabloceratops : Diabloceratops eatoni 83.5 - 70.6 Ma Late/Upper Cretaceous Cordiceramus gilberti species Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : Cordiceramus gilberti 85.8 - 83.5 Ma Late/Upper Cretaceous Wasatchites perrini species Animalia : Mollusca : Cephalopoda : Ammonoidea : Prionitidae : Wasatchites : Wasatchites perrini 251.3 - 247.2 Ma Early/Lower Triassic Teratophoneus curriei species Animalia : Chordata : Saurischia : Avetheropoda : Tyrannosauridae : Teratophoneus : Teratophoneus curriei 83.5 - 70.6 Ma Late/Upper Cretaceous Eutheria infraclass Animalia : Chordata : Mammalia : Eutheria 89.3 - 85.8 Ma Late/Upper Cretaceous Metatheria subclass Animalia : Chordata : Mammalia : Metatheria 93.9 - 70.6 Ma Late/Upper Cretaceous Nezpercius genus Animalia : Chordata : Osteichthyes : Caudata : Urodela : Nezpercius 83.6 - 72.1 Ma Late/Upper Cretaceous Nezpercius dodsoni species Animalia : Chordata : Osteichthyes : Caudata : Urodela : Nezpercius : Nezpercius dodsoni 83.5 - 70.6 Ma Late/Upper Cretaceous Acristavus gagslarsoni species Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae : Acristavus : Acristavus gagslarsoni 83.5 - 70.6 Ma Late/Upper Cretaceous Pediomyidae unranked clade Animalia : Chordata : Mammalia : Pediomyidae 83.5 - 70.6 Ma Late/Upper Cretaceous Trochosmilia moorei species Animalia : Cnidaria : Anthozoa : Scleractinia : Caryophylliidae : Trochosmilia : Trochosmilia moorei 93.9 - 89.8 Ma Late/Upper Cretaceous Elliptio (Plesielliptio) subgenus Animalia : Mollusca : Bivalvia : Unionida : Unionidae : Elliptio : Elliptio (Plesielliptio) 83.6 - 72.1 Ma Late/Upper Cretaceous Utahceratops gettyi species Animalia : Chordata : Ornithischia : Ceratopsidae : Utahceratops : Utahceratops gettyi 83.5 - 70.6 Ma Late/Upper Cretaceous Kosmoceratops richardsoni species Animalia : Chordata : Ornithischia : Ceratopsidae : Kosmoceratops : Kosmoceratops richardsoni 83.5 - 70.6 Ma Late/Upper Cretaceous Talos sampsoni species Animalia : Chordata : Saurischia : Avetheropoda : Troodontidae : Talos : Talos sampsoni 83.5 - 70.6 Ma Late/Upper Cretaceous Dolichorhynchops tropicensis species Animalia : Chordata : Reptilia : Polycotylidae : Dolichorhynchops : Dolichorhynchops tropicensis 93.5 - 89.3 Ma Late/Upper Cretaceous Eoalphadon genus Animalia : Chordata : Mammalia : Didelphimorphia : Alphadontidae : Eoalphadon 100.5 - 93.5 Ma Late/Upper Cretaceous Cedaromys minimus species Animalia : Chordata : Mammalia : Cedaromys : Cedaromys minimus 99.6 - 93.5 Ma Late/Upper Cretaceous Eoalphadon woodburnei species Animalia : Chordata : Mammalia : Didelphimorphia : Alphadontidae : Eoalphadon : Eoalphadon woodburnei 99.6 - 93.5 Ma Late/Upper Cretaceous Neoschizodus praeorbicularis species Animalia : Mollusca : Bivalvia : Trigoniida : Myophoriidae : Neoschizodus : Neoschizodus praeorbicularis 251.3 - 247.2 Ma Early/Lower Triassic Trigonia montanaensis species Animalia : Mollusca : Bivalvia : Trigoniida : Trigoniidae : Trigonia : Trigonia montanaensis 170.3 - 166.1 Ma Middle Jurassic Anasibirites kingianus species Animalia : Mollusca : Cephalopoda : Ceratitida : Prionitidae : Anasibirites : Anasibirites kingianus 251.3 - 247.2 Ma Early/Lower Triassic Pteridopsida class Plantae : Pteridophyta : Pteridopsida 100.5 - 93.9 Ma Late/Upper Cretaceous Inoceramus pictus species Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : Inoceramus pictus 100.5 - 93.5 Ma Late/Upper Cretaceous Nasutoceratops titusi species Animalia : Chordata : Ornithischia : Ceratopsidae : Nasutoceratops : Nasutoceratops titusi 83.5 - 70.6 Ma Late/Upper Cretaceous Lythronax argestes species Animalia : Chordata : Saurischia : Avetheropoda : Tyrannosauridae : Lythronax : Lythronax argestes 83.5 - 70.6 Ma Late/Upper Cretaceous Arctoprionites resseri species Animalia : Mollusca : Cephalopoda : Ceratitida : Prionitidae : Arctoprionites : Arctoprionites resseri 251.3 - 247.2 Ma Early/Lower Triassic Adelolophus hutchisoni species Animalia : Chordata : Reptilia : Dinosauria : Hadrosauridae : Adelolophus : Adelolophus hutchisoni 83.5 - 70.6 Ma Late/Upper Cretaceous Lima (Plagiostoma) ziona species Animalia : Mollusca : Bivalvia : Pectinida : Limidae : Plagiostoma : Lima (Plagiostoma) ziona 170.3 - 166.1 Ma Middle Jurassic Vaugonia utahensis species Animalia : Mollusca : Bivalvia : Trigoniida : Myophorellidae : Vaugonia : Vaugonia utahensis 170.3 - 166.1 Ma Middle Jurassic Neocrassina (Coelastarte) subgenus Animalia : Mollusca : Bivalvia : Carditida : Astartidae : Neocrassina : Neocrassina (Coelastarte) 170.3 - 166.1 Ma Middle Jurassic Astarte (Coelastarte) livingstonensis species Animalia : Mollusca : Bivalvia : Carditida : Astartidae : Neocrassina : Astarte (Coelastarte) livingstonensis 170.3 - 166.1 Ma Middle Jurassic Pronoella uintahensis species Animalia : Mollusca : Bivalvia : Venerida : Trapezidae : Pronoella : Pronoella uintahensis 170.3 - 166.1 Ma Middle Jurassic Astarte meeki species Animalia : Mollusca : Bivalvia : Carditida : Astartidae : Astarte : Astarte meeki 170.3 - 166.1 Ma Middle Jurassic Pronoella cinnabarensis species Animalia : Mollusca : Bivalvia : Veneroidei : Arcticidae : Pronoella : Pronoella cinnabarensis 170.3 - 166.1 Ma Middle Jurassic Thracia weedi species Animalia : Mollusca : Bivalvia : Thraciidae : Thracia : Thracia weedi 170.3 - 166.1 Ma Middle Jurassic Anatina (Cercomya) punctata species Animalia : Mollusca : Bivalvia : Pandorida : Laternulidae : Cercomya : Anatina (Cercomya) punctata 170.3 - 166.1 Ma Middle Jurassic Pholadomya inaequiplicata species Animalia : Mollusca : Bivalvia : Pholadomyidae : Pholadomya : Pholadomya inaequiplicata 170.3 - 166.1 Ma Middle Jurassic Neocardioceras juddii species Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Neocardioceras : Neocardioceras juddii 99.6 - 93.5 Ma Late/Upper Cretaceous Sciponoceras gracile species Animalia : Mollusca : Cephalopoda : Ammonitida : Baculitidae : Sciponoceras : Sciponoceras gracile 100.5 - 93.9 Ma Late/Upper Cretaceous Liostrea strigilecula species Animalia : Mollusca : Bivalvia : Ostreida : Gryphaeidae : Liostrea : Liostrea strigilecula 170.3 - 166.1 Ma Middle Jurassic Lyosoma enoda species Animalia : Mollusca : Gastropoda : Cycloneritida : Neritidae : Lyosoma : Lyosoma enoda 170.3 - 166.1 Ma Middle Jurassic Rhabdocolpus viriosus species Animalia : Mollusca : Gastropoda : Procerithiidae : Rhabdocolpus : Rhabdocolpus viriosus 170.3 - 166.1 Ma Middle Jurassic Cossmannea imlayi species Animalia : Mollusca : Gastropoda : Nerineidae : Cossmannea : Cossmannea imlayi 170.3 - 166.1 Ma Middle Jurassic Cossmannea kanabensis species Animalia : Mollusca : Gastropoda : Nerineidae : Cossmannea : Cossmannea kanabensis 170.3 - 166.1 Ma Middle Jurassic Lyosoma powelli species Animalia : Mollusca : Gastropoda : Neritidae : Lyosoma : Lyosoma powelli 170.3 - 166.1 Ma Middle Jurassic Alzadites incomptus species Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Alzadites : Alzadites incomptus 99.6 - 93.5 Ma Late/Upper Cretaceous Cristadjidaumo mckennai species Animalia : Chordata : Mammalia : Rodentia : Eomyidae : Cristadjidaumo : Cristadjidaumo mckennai 40.4 - 37.2 Ma Eocene Passaliscomys priscus species Animalia : Chordata : Mammalia : Rodentia : Heliscomyidae : Passaliscomys : Passaliscomys priscus 40.4 - 37.2 Ma Eocene Machairoceratops cronusi species Animalia : Chordata : Ornithischia : Ceratopsidae : Machairoceratops : Machairoceratops cronusi 83.5 - 70.6 Ma Late/Upper Cretaceous Arvinachelys genus Animalia : Chordata : Reptilia : Testudines : Baenidae : Arvinachelys 83.5 - 70.6 Ma Late/Upper Cretaceous Arvinachelys goldeni species Animalia : Chordata : Reptilia : Testudines : Baenidae : Arvinachelys : Arvinachelys goldeni 83.5 - 70.6 Ma Late/Upper Cretaceous Bicuspidon smikros species Animalia : Chordata : Reptilia : Squamata : Teiidae : Bicuspidon : Bicuspidon smikros 100.5 - 93.5 Ma Late/Upper Cretaceous Utahgenys antongai species Animalia : Chordata : Reptilia : Squamata : Contogeniidae : Utahgenys : Utahgenys antongai 99.6 - 93.5 Ma Late/Upper Cretaceous Dakotaseps gillettorum species Animalia : Chordata : Reptilia : Squamata : Dakotaseps : Dakotaseps gillettorum 100.5 - 93.9 Ma Late/Upper Cretaceous Webbsaurus lofgreni species Animalia : Chordata : Reptilia : Squamata : Webbsaurus : Webbsaurus lofgreni 100.5 - 93.9 Ma Late/Upper Cretaceous Cnodontosaurus genus Animalia : Chordata : Reptilia : Squamata : Cnodontosaurus 93.9 - 89.3 Ma Late/Upper Cretaceous Cnodontosaurus suchockii species Animalia : Chordata : Reptilia : Squamata : Cnodontosaurus : Cnodontosaurus suchockii 100.5 - 93.9 Ma Late/Upper Cretaceous Monocnemodon syphakos species Animalia : Chordata : Reptilia : Squamata : Monocnemodon : Monocnemodon syphakos 85.8 - 83.5 Ma Late/Upper Cretaceous Odaxosaurus roosevelti species Animalia : Chordata : Reptilia : Squamata : Anguidae : Odaxosaurus : Odaxosaurus roosevelti 83.5 - 70.6 Ma Late/Upper Cretaceous Parasaniwa cynochoros species Animalia : Chordata : Reptilia : Squamata : Varanidae : Parasaniwa : Parasaniwa cynochoros 83.5 - 70.6 Ma Late/Upper Cretaceous Algorachelus tibert species Animalia : Chordata : Reptilia : Testudines : Bothremydidae : Algorachelus : Algorachelus tibert 100.5 - 93.9 Ma Late/Upper Cretaceous Inoceramus (Volviceramus) koeneni species Animalia : Mollusca : Bivalvia : Myalinida : Inoceramidae : Inoceramus : Inoceramus (Volviceramus) koeneni 89.3 - 85.8 Ma Late/Upper Cretaceous Neurankylus hutchisoni species Animalia : Chordata : Reptilia : Testudines : Baenidae : Neurankylus : Neurankylus hutchisoni 83.5 - 70.6 Ma Late/Upper Cretaceous Lopha engelmanni species Animalia : Mollusca : Bivalvia : Ostreida : Ostreidae : Lopha : Lopha engelmanni 170.3 - 166.1 Ma Middle Jurassic Varalphadon janetae species Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Varalphadon : Varalphadon janetae 100.5 - 85.8 Ma Late/Upper Cretaceous Lutemys warreni species Animalia : Chordata : Reptilia : Testudines : Lutemys : Lutemys warreni 83.5 - 70.6 Ma Late/Upper Cretaceous Plicatula ferryi species Animalia : Mollusca : Bivalvia : Pectinida : Plicatulidae : Plicatula : Plicatula ferryi 99.6 - 93.5 Ma Late/Upper Cretaceous Saltirius utahensis species Animalia : Chordata : Chondrichthyes : Myliobatiformes : Saltirius : Saltirius utahensis 40.4 - 37.2 Ma Eocene Fumodelphodon pulveris species Animalia : Chordata : Mammalia : Didelphimorphia : Stagodontidae : Fumodelphodon : Fumodelphodon pulveris 93.9 - 89.8 Ma Late/Upper Cretaceous Hoodootherium praeceps species Animalia : Chordata : Mammalia : Didelphimorphia : Stagodontidae : Hoodootherium : Hoodootherium praeceps 93.9 - 89.8 Ma Late/Upper Cretaceous Akainacephalus johnsoni species Animalia : Chordata : Ornithischia : Ankylosauridae : Akainacephalus : Akainacephalus johnsoni 83.5 - 70.6 Ma Late/Upper Cretaceous Mirarce eatoni species Animalia : Chordata : Aves : Avisauridae : Mirarce : Mirarce eatoni 83.5 - 70.6 Ma Late/Upper Cretaceous Neurankylus utahensis species Animalia : Chordata : Reptilia : Testudines : Baenidae : Neurankylus : Neurankylus utahensis 83.5 - 70.6 Ma Late/Upper Cretaceous
Fossil Localities	Click to show 138 fossil localities

Localities in this Region

Other Regions, Features and Areas that Intersect

References