Phlegethontiidae is a family of extinct
aistopod
Aistopoda (Greek for " avingnot-visible feet") is an order of highly specialised snake-like stegocephalians known from the Carboniferous and Early Permian of Europe and North America, ranging from tiny forms only , to nearly in length. They fi ...
amphibian
Amphibians are tetrapod, four-limbed and ectothermic vertebrates of the Class (biology), class Amphibia. All living amphibians belong to the group Lissamphibia. They inhabit a wide variety of habitats, with most species living within terres ...
s including the genera ''
Phlegethontia
''Phlegethontia'' is an extinct genus of aïstopod stegocephalians from the Carboniferous and Permian periods of Europe and North America.
It was about long, and possessed a lightly built skull with many openings, unlike some earlier relative ...
'' and ''
Sillerpeton
''Sillerpeton'' is an extinct genus of aïstopod tetrapodomorphs within the family Phlegethontiidae. It contains a single species, ''Sillerpeton permianum'', which is based on braincases and vertebrae from the Early Permian Richards Spur local ...
''.
Carboniferous amphibians
Permian amphibians
Aistopods
{{paleo-amphibian-stub