Archegosauroidea

Archegosauroidea is an extinct superfamily of Permian temnospondyls. The superfamily is assigned to the clade Stereospondylomorpha and is the sister taxon to the suborder Stereospondyli.^[1] It includes the families Actinodontidae and Archegosauridae, and possibly the genus Intasuchus, which is placed within the monotypic family Intasuchidae. They were fully aquatic animals, and were metabolically and physiologically more similar to fish than modern amphibians.^[2]

Archegosauroids Temporal range: Pennsylvanian to Late Permian, 301–251.902 Ma PreꞒ Ꞓ O S D C P T J K Pg N
Prionosuchus
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Order:	†Temnospondyli
Clade:	†Stereospondylomorpha
Superfamily:	†Archegosauroidea Lydekker, 1885
Families
Actinodontidae Archegosauridae Sclerocephalidae ?Intasuchidae

Gallery

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  Sclerocephalus hauseri, of the early Permian of Germany
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  Intasuchus silvicola, of the early Permian of Russia
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  Cheliderpeton vranyi, of the early Permian of the Czech Republic
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  Melosaurus platyrhinus, a melosaurine archegosaurid of the early to middle Permian of Russia
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  Platyoposaurus stuckenbergi, a platyoposaurine archegosaurid of the middle Permian of Russia