Eureptilia

Eureptiles ; Temporal range: Late Carboniferous?Present Pre? ? O S D C P T J K Pg N
	Labidosaurikos meachami , an early eureptilian of the family Captorhinidae
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Chordata
Class:	Reptilia
Clade :	Eureptilia ; Olson , 1947
Subgroups
	† Hylonomus ; † Thuringothyris ; † Captorhinidae ; † " Protorothyrididae " ; Diapsida ; Parareptilia ? ( Paraphyletic to Neodiapsida ) ; Synapsida ? ;

Eureptilia ("true reptiles") is one of the two major subgroups of the clade Sauropsida , the other one being Parareptilia . Eureptilia includes Diapsida (the clade containing all modern reptiles and birds ), as well as a number of primitive Permo - Carboniferous forms previously classified under Anapsida , in the old (no longer recognised) order " Cotylosauria ". ^[2]

Eureptilia is characterized by the skull having greatly reduced supraoccipital , tabular , and supratemporal bones that are no longer in contact with the postorbital . Aside from Diapsida, the group notably contains Captorhinidae , a diverse and long lived (Late Carboniferous-Late Permian) clade of initially small carnivores that later evolved into large herbivores. ^[3] Other primitive eureptiles such as the " protorothyrids " were all small, superficially lizard-like forms, that were probably insectivorous . ^[4] One primitive eureptile, the Late Carboniferous "protorothyrid" Anthracodromeus , is the oldest known climbing tetrapod. ^[5] Diapsids were the only eureptilian clade to continue beyond the end of the Permian.

Classification [ edit ]

Eureptilia was defined as a stem-based clade , specifically, the most inclusive clade containing Captorhinus aguti and Petrolacosaurus kansensis but not Procolophon trigoniceps , by Tsuji and Muller (2009). ^[6] The cladogram here was modified after Muller and Reisz (2006): ^[7]