Atokasaurus

Atokasaurus Temporal range: Early Cretaceous
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Order:	Squamata
Infraorder:	Scincomorpha
Family:	†Paramacellodidae (?)
Genus:	†Atokasaurus Nydam and Cifelli, 2002
Type species
†Atokasaurus metarsiodon Nydam and Cifelli, 2002

Atokasaurus is an extinct genus of scincomorph lizard from the Early Cretaceous of Oklahoma. The type and only species is Atokasaurus metarsiodon, named in 2002 on the basis of a single isolated lower jaw bone found within the Antlers Formation in Atoka County. It is similar in appearance to extinct lizards in the family Paramacellodidae and may itself be a paramacellodid, although the phylogenetic relationships of the group are uncertain. Atokasaurus differs from other paramacellodids in having teeth in the lower jaw with enlarged bases and an S-shaped profile when viewed edge-on.^[1]

References

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Extinct squamate genera

• Kingdom: Animalia
• Phylum: Chordata
• Class: Reptilia
• Superorder: Lepidosauria

Iguania
Acrodonta Anqingosaurus Barbaturex Bharatagama Gueragama Xianglong Agamidae Indiagama Suratagama Pleurodonta / Iguanoidea Anolbanolis Suzanniwana Uquiasaurus Xihaina Corytophanidae Aciprion? Babibasiliscus Geiseltaliellus †Gobiguania Anchaurosaurus Ctenomastax Igua Isodontosaurus Polrussia Saichangurvel Temujinia Zapsosaurus Iguanidae Afairiguana Polychrotidae Armandisaurus Lapitiguana Pariguana Pristiguana Pumilia Phrynosomatidae Desertiguana Other extinct iguanians Brasiliguana Hoyalacerta? Huehuecuetzpalli? Swainiguanoides †Arretosauridae Arretosaurus Dornosaurus Ergiliinsaurus Khaichinguana †Priscagamidae Heterodontagama Mimeosaurus Phrynosomimus Pleurodontagama? Priscagama

†Polyglyphanodontia / Borioteiioidea

Chamopsiidae Chamops Gerontoseps Glyptogenys Harmodontosaurus Haptosphenus Leptochamops Meniscognathus Pelsochamops Socognathus Stypodontosaurus Trippenaculus Gilmoreteiidae / "macrocephalosaurines" Gilmoreteius Kuwajimalla Yechilacerta "Polyglyphanodontines" Bicuspidon Cherminsaurus Darchansaurus Distortodon Erdenetesaurus Polyglyphanodon Sineoamphisbaena? Other polyglyphanodontians Adamisaurus Funiusaurus Gobinatus Obamadon Olindalacerta? Paleochelco? Peneteius Tchingisaurus Tianyusaurus Tijubina? Tripennaculus

Stem Scincogekkonomorpha
Scincogekkonomorpha Ardeosaurus? Bavarisaurus? Eichstaettisaurus? Jucaraseps Liushusaurus? Pedrerasaurus Scandensia? Yabeinosaurus? Scleroglossa Gekkonomorpha Norellius Gekkota Cadurcogekko Cretaceogekko Gobekko Hoburogekko Yanatarogecko Stem Autarchoglossa (Evansauria) Parmeosaurus Tepexisaurus Tijubina? †Bainguidae? Bainguis? Eoxanta Globaura Myrmecodaptria

Scincomorpha

Cordyloidea Eocordyla Ornatocephalus Sakurasaurus Lacertoidea Cnodontosaurus Paracontogenys Purbicella †Polyglyphanodontia? Amphisbaenia Oligodontosaurus Todrasaurus Amphisbaenidae Listromycter Lophocranion Bipedidae Anniealexandria Blanidae Blanosaurus Cuvieribaena Louisamphisbaena †Chthonophidae Chthonophis Rhineuridae Archaerhineura Dyticonastis Hadrorhineura Hyporhina Jepsibaena Macrorhineura Ototriton Plesiorhineura Protorhineura Spathorhynchus †Polyodontobaenidae Polyodontobaena †Contogeniidae Contogenys Palaeoscincosaurus Utahgenys Lacertidae Amblyolacerta Camptognathosaurus? Dormaalisaurus Dracaenosaurus Escampcerta Gracilicerta Ligerosaurus Maioricalacerta Mediolacerta Plesiolacerta Pseudeumeces Pseudolacerta Quercycerta Teiidae Brevisaurus? Meyasaurus? Ptilotodon †Barbatteiidae Barbatteius Oardasaurus Xantusiidae Catactegenys Palepidophyma Palaeoxantusia Scincoidea Retinosaurus Scincoideus Slavoia Scincidae Axonoscincus Orthoscincus Pyrenasaurus? Other scincomorphs Apsgnathus Calanguban Chromatogenys Dakotaseps Kleskunsaurus Lonchisaurus Monocnemodon Pachygenys Saurillodon Saurillus Sciroseps Webbsaurus †Paramacellodidae Atokasaurus? Becklesius Mimobecklesisaurus Paramacellodus Parasaurillus? Pseudosaurillus? Sharovisaurus

Anguimorpha
Basal anguimorphs Chometokadmon Eolacerta Paramacellodus Paravaranus? Yabeinosaurus? †Mosasauroidea? †Aigialosauridae †Mosasauridae Neoanguimorpha Carusioidea Carusia Xenosauridae Entomophontes Exostinus Restes Anguidae Odaxosaurus Anguinae Headonhillia Helvetisaurus Ophisauriscus Ragesaurus Diploglossinae Apodosauriscus Eodiploglossus Gerrhonotinae Paragerrhonotus Parophisaurus †Glyptosaurinae Arpadosaurus Melanosaurus Gaultia Glyptosaurus Helodermoides Odaxosaurus Paraglyptosaurus Paraplacosauriops Peltosaurus Placosaurus Proglyptosaurus Proxestops Xestops Paleoanguimorpha Basal varanoids / platynotans Aiolosaurus Colpodontosaurus Dorsetisaurus Eosaniwa Palaeovaranus Parasaniwa Parviderma Proplatynotia Saniwides Telmasaurus Shinisauria? Bahndwivici Dalinghosaurus Merkurosaurus Provaranosaurus Goannasauria Basal Goannasaurians Asprosaurus Chianghsia Estesia Eurheloderma Gobiderma Lowesaurus Morohasaurus Palaeosaniwa Paraderma Primaderma Varanoidea Lanthanotidae Cherminotus Varanidae Ovoo Saniwa Archaeovaranus Other platynotans / varanoids Arcanosaurus? Cemeterius Dryadissector

Ophidia
Coniophis Diablophis Dinilysia? Eophis Lapparentophis Najash? Parviraptor Portugalophis Tetrapodophis See Serpentes (snakes)

Indeterminate squamates
Costasaurus Lamiasaura Oculudentavis? Schillerosaurus

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