Taxon Age Top Age Bottom Clade Ecology Age 190 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 Cosgriffius campi 248 249 Amphibia amphibious carnivore 1 Stanocephalosaurus birdi 248 249 Amphibia amphibious carnivore 1 Eocyclotosaurus wellesi 242 246 Amphibia amphibious carnivore 1 1 1 1 Hadrokkosaurus bradyi 242 246 Amphibia amphibious carnivore 1 1 1 1 Quasicyclotosaurus campi 242 246 Amphibia amphibious carnivore 1 1 1 1 Stanocephalosaurus 242 246 Amphibia amphibious carnivore 1 1 1 1 Vigilius Wellesi 242 246 Amphibia amphibious carnivore 1 1 1 1 Latiscopus 208 215 Amphibia amphibious carnivore 1 1 1 1 1 1 1 Eocaecilia micropodia 190 196 Amphibia amphibious carnivore 1 1 1 1 1 1 Prosalirus bitis 190 196 Amphibia amphibious carnivore 1 1 1 1 1 1 Rileymillerus cosgriffi 208 215 Amphibia amphibious carnivore 1 1 1 1 1 1 1 Apachesaurus gregorii 203 220 Amphibia amphibious carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Apachesaurus 216 223 Amphibia amphibious carnivore 1 1 1 1 1 1 1 Koskinonodon 206 210 Amphibia amphibious carnivore 1 1 1 1 Koskinonodon perfectus 208 224 Amphibia amphibious carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Metoposaurus 203 224 Amphibia amphibious carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Metoposaurus bakeri 208 215 Amphibia amphibious carnivore 1 1 1 1 1 1 1 Acrodus 216 218 Chondrichthyes nektonic carnivore 1 1 Diplolonchidion 221 223 Chondrichthyes nektonic carnivore 1 1 Hybodus 242 246 Chondrichthyes nektonic carnivore 1 1 1 1 Lonchidion humblei 208 223 Chondrichthyes nektonic carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Polyacrodus 221 223 Chondrichthyes nektonic carnivore 1 1 Pyknotylacanthus 247 249 Chondrichthyes nektonic carnivore 1 1 Reticulodus 206 210 Chondrichthyes nektonic carnivore 1 1 1 1 Triodus moorei 218 223 Chondrichthyes nektobenthic carnivore 1 1 1 1 1 Turseodus 206 223 Chondrichthyes nektonic carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Xenacanthus 220 223 Chondrichthyes nektobenthic carnivore 1 1 1 Arganodus 203 218 Dipnoi omnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Arganodus dorotheae 221 223 Dipnoi omnivore 1 1 Ceratodus 203 208 Dipnoi omnivore 1 1 1 1 1 Ceratodus crosbiensis 221 223 Dipnoi omnivore 1 1 Australosomus 218 220 Osteichthyes nektonic carnivore 1 1 Boreosomus 242 246 Osteichthyes nektonic carnivore 1 1 1 1 Chinlea 204 220 Osteichthyes fish 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Hemicalypterus 203 208 Osteichthyes nektonic carnivore 1 1 1 1 1 Lasalichthys 203 223 Osteichthyes nektonic carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Semionotus 203 220 Osteichthyes nektonic carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Synorichthys 203 208 Osteichthyes nektonic carnivore 1 1 1 1 1 Cosmacanthus 247 249 Placoderm nektonic carnivore 1 1 Cymbospondylus 247 249 Icthyosauria nektonic carnivore 1 1 Corosaurus alcovensis 246.5 247 Sauropterygia carnivore 1 Anisodontosaurus greeri 242 246 Lepidosauromorpha 1 1 1 1 Chinlechelys tenertesta 208 216 Testudines aquatic omnivore 1 1 1 1 1 1 1 1 Kayentachelys 190 196 Testudines aquatic omnivore 1 1 1 1 1 Spinosuchus caseanus 221 223 Trilophosauridae herbivore 1 1 Trilophosaurus buettneri 206 223 Trilophosauridae herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Trilophosaurus dornorum 208 218 Trilophosauridae herbivore 1 1 1 1 1 1 1 1 1 1 Trilophosaurus sp. 215 220 Trilophosauridae herbivore 1 1 1 1 1 Trilophosaurus jacobsi 218 223 Trilophosauridae herbivore 1 1 1 1 1 Malerisaurus langstoni 208 215 Protorosauria ground dwelling carnivore 1 1 1 1 1 1 1 Tanytrachelos 220 223 Protorosauria ground dwelling carnivore 1 1 1 Colognathus obscurus 218 220 Procolophonia herbivore 1 1 Colognathus obscurus 221 223 Procolophonia herbivore 1 1 Ammorhynchus navajoi 242 246 Rhynchosaur herbivore 1 1 1 1 Clevosaurus 208 223 Rhynchosaur herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Hyperodapedon sanjuanensis 218 224 Rhynchosaur herbivore 1 1 1 1 1 1 Otischalkia elderae 208 215 Rhynchosaur herbivore 1 1 1 1 1 1 Paleollanosaurus fraseri 221 223 Rhynchosaur herbivore 1 1 Planocephalosaurus lucasi 221 223 Rhynchosaur herbivore 1 1 archosauriformes 238 247 Archosauriformes 1 1 1 1 1 1 1 1 1 Crosbysaurus harrisae 218 223 Archosauriformes 1 1 1 1 1 Lucianosaurus 203 208 Archosauriformes 1 1 1 1 1 Protecovasaurus lucasi 208 223 Archosauriformes 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Vancleavea campi 203 223 Archosauriformes aquatic carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Vancleavea 208 224 Archosauriformes aquatic carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Eucoelophysis 204 220 Silosauridae herbivore Technosaurus smalli 208 215 Silosauridae herbivore 1 1 1 1 1 1 1 Tecovasaurus sp. 220 223 Silosauridae herbivore 1 1 1 Dolichobrachium gracile 218 224 Rauisuchidae carnivore 1 1 1 1 1 1 Postosuchus sp. 206 210 Rauisuchidae carnivore 1 1 1 1 Postosuchus kirkpatricki 203 224 Rauisuchidae carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Angistorhinus gracilis 218 224 Phytosauria carnivore 1 1 1 1 1 1 Angistorhinus maximus 218 224 Phytosauria carnivore 1 1 1 1 1 1 Brachysuchus megalodon 218 224 Phytosauria carnivore 1 1 1 1 1 1 Leptosuchus crosbiensis 208 223 Phytosauria carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Leptosuchus adamanensis 216 220 Phytosauria carnivore 1 1 Machaeroprosopus validus 218 220 Phytosauria carnivore 1 1 Nicrosaurus 216 218 Phytosauria carnivore 1 1 Paleorhinus sp. 220 223 Phytosauria carnivore 1 1 1 Paleorhinus bransoni 218 224 Phytosauria carnivore 1 1 1 1 1 1 Parasuchus 218 224 Phytosauria carnivore 1 1 1 1 1 1 Phytosaurus 218 223 Phytosauria herbivore 1 1 1 1 1 Promystriosuchus 221 223 Phytosauria carnivore 1 1 Pseudopalatus buceros 206 218 Phytosauria carnivore 1 1 1 1 1 1 1 1 1 1 1 1 Pseudopalatus jablonskiae 216 218 Phytosauria carnivore 1 1 Pseudopalatus mccauleyi 206 218 Phytosauria carnivore 1 1 1 1 1 1 1 1 1 1 1 1 Pseudopalatus pristinus 206 218 Phytosauria carnivore 1 1 1 1 1 1 1 1 1 1 1 1 Redondasaurus gregorii 203 208 Phytosauria carnivore 1 1 1 1 1 Redondasaurus reseri 203 208 Phytosauria carnivore 1 1 1 1 1 Redondasaurus rineharti 203 208 Phytosauria carnivore 1 1 1 1 1 Rutiodon sp. 203 223 Phytosauria carnivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Smilosuchus gregorii 218 220 Phytosauria carnivore 1 1 Eopneumatosuchus 190 196 Crocodilomorphs carnivore 1 1 1 1 1 Hesperosuchus 203 208 Crocodilomorphs carnivore 1 1 1 1 1 Hesperosuchus agilis 204 220 Crocodilomorphs carnivore Kayentasuchus walkeri 190 196 Crocodilomorphs carnivore 1 1 1 1 1 Protosuchus 190 201 Crocodilomorphs carnivore 1 1 1 1 1 1 1 1 1 1 Redondavenator quayensis 203 208 Crocodilomorphs carnivore 1 1 1 1 1 Saurosuchus 218 220 Crocodilomorphs carnivore 1 1 Chatterjeea 206 210 Poposaurids carnivore 1 1 1 1 Arizonasaurus babbitti 242 246 Poposaurids carnivore 1 1 1 1 Effigia okeeffeae 204 208 Poposaurids carnivore 1 1 1 1 Heptasuchus clarki 218 224 Poposaurids carnivore 1 1 1 1 1 1 Poposaurus 206 210 Poposaurids carnivore 1 1 1 1 Poposaurus gracilis 216 224 Poposaurids carnivore 1 1 1 1 1 1 1 1 Shuvosaurus inexpectatus 208 215 Poposaurids carnivore 1 1 1 1 1 1 1 Tecovasuchus murryi 221 223 Aetosaur herbivore 1 1 Typothorax antiquum 223 224 Aetosaur herbivore 1 Typothorax coccinarum 203 224 Aetosaur herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Stagonolepis wellsi 208 223 Aetosaur herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Stagonolepis 220 224 Aetosaur herbivore 1 1 1 1 Revueltosaurus 203 223 Aetosaur herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Revueltosaurus callenderi 208 220 Aetosaur herbivore 1 1 1 1 1 1 1 1 1 1 1 1 Paratypothorax 208 224 Aetosaur herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Neoaetosauroides 203 208 Aetosaur herbivore 1 1 1 1 1 Longosuchus meadei 217 222 Aetosaur herbivore 1 1 1 1 1 Desmatosuchus spurensis 218 223 Aetosaur herbivore 1 1 1 1 1 Desmatosuchus 208 224 Aetosaur herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 Acaenoasuchus geoffreyi 218 220 Aetosaur herbivore 1 1 Acallosuchus rectori 218 220 Aetosaur herbivore 1 1 Acompsosaurus wingatensis 220 223 Aetosaur herbivore 1 1 1 Adamanasuchus eisenhardtae 218 220 Aetosaur herbivore 1 1 Aetosaurus 208 215 Aetosaur herbivore 1 1 1 1 1 1 1 Rhamphinion jenkinsi 190 196 Pterosauria volant piscivore 1 1 1 1 1 Caseosaurus 208 220 Dinosauria carnivore 1 1 1 1 1 1 1 1 1 1 1 1 Coelophysis kayentakatae 190 196 Dinosauria carnivore 1 1 1 1 1 Coelophysis bauri 204 208 Dinosauria carnivore 1 1 1 1 Coelophysis 208 215 Dinosauria carnivore 1 1 1 1 1 1 1 Coelophysis bauri 208 216 Dinosauria carnivore 1 1 1 1 1 1 1 1 Coelophysis bauri 208 220 Dinosauria carnivore 1 1 1 1 1 1 1 1 1 1 1 1 Coelophysis 221 223 Dinosauria carnivore 1 1 Daemonosaurus chauliodus 204 208 Dinosauria ground dwelling carnivore 1 1 1 1 Dilophosaurus wetherilli 190 196 Dinosauria carnivore 1 1 1 1 1 Hopiichnus shingi 190 196 Dinosauria omnivore 1 1 1 1 1 Massospondylus 190 196 Dinosauria herbivore 1 1 1 1 1 Megapnosaurus 196 201 Dinosauria carnivore 1 1 1 1 1 Protoavis texensis 208 215 Dinosauria ground dwelling carnivore 1 1 1 1 1 1 1 Sarahsaurus aurifontanalis 190 196 Dinosauria herbivore 1 1 1 1 1 Scelidosaurus 190 196 Dinosauria ground dwelling herbivore 1 1 1 1 1 Scutellosaurus lawleri 190 196 Dinosauria ground dwelling herbivore 1 1 1 1 1 Tawa hallae 208 220 Dinosauria ground dwelling carnivore 1 1 1 1 1 1 1 1 1 1 1 1 Dinnetherium nezorum 190 196 Mammalia Scansorial insectivore 1 1 1 1 1 Morganucodon 190 196 Mammalia Scansorial insectivore 1 1 1 1 1 Adelobasileus cromptoni 221 223 Therapsid Scansorial insectivore 1 1 Dicynodontia 238 247 Therapsid herbivore 1 1 1 1 1 1 1 1 1 Dinnebitodon 190 196 Therapsid herbivore 1 1 1 1 1 Ischigualastia 223 224 Therapsid herbivore 1 Kayentatherium wellesi 190 196 Therapsid herbivore 1 1 1 1 1 Oligokyphus 190 196 Therapsid herbivore 1 1 1 1 1 Pachygenelus milleri 208 215 Therapsid Scansorial insectivore 1 1 1 1 1 1 1 Pentasauropus 218 223 Therapsid herbivore 1 1 1 1 1 Placerias 208 218 Therapsid herbivore 1 1 1 1 1 1 1 1 1 1 Placerias hesternus 218 224 Therapsid herbivore 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1