stereospondyli

Rachitomi is no longer recognized as a group, but Stereospondyli is still considered valid.

The Stereospondyli are a group of extinct temnospondyl amphibians.

It includes the superfamily Archegosauroidea and the more diverse group Stereospondyli.

Along with capitosaurs, rhytidosteans comprise much of the larger suborder Stereospondyli.

The relationship of dvinosaurians to other temnospondyls is uncertain, as they may or may not belong to Stereospondyli.

All members of Stereospondyli had amphicoelous centra composed only of the intercentra.

Derwentiidae was named in 2000 as a family of Australian temnospondyls in the suborder Stereospondyli.

He defined it as a stem-based taxon including all temnospondyls more closely related to Stereospondyli than to Edopoidea.

Not all members of Rhachitomi have rhachitomous vertebrae; the largest subgroup, Stereospondyli, lacks pleurocentra.

"Grade" Stereospondyli (Simplified backbones with only intercentrum and vertebral arch, still recognized as a valid group)

It was placed among archegosauroids, although Archegosauroidea was found to be a paraphyletic assemblage of taxa basal to Stereospondyli.

The superfamily is assigned to the clade Stereospondylomorpha and is the sister taxon to the suborder Stereospondyli.

Indobrachyops belongs to a group of mostly semi-aquatic temnospondyls called Stereospondyli, but its exact placement within the group has been uncertain since its first description.

A more recent study reassigned Australerpeton to the family Rhinesuchidae within the suborder Stereospondyli based on an earlier evaluation of the family.

In 1888, von Zittel divided stegocephalians among three taxa: Lepospondyli, Temnospondyli, and Stereospondyli.

Within Stereospondyli, Yates and Warren erected two major clades: Capitosauria and Trematosauria.

The phylogeny of the `higher' temnospondyls (Vertebrata: Choanata) and its implications for the monophyly and origins of the Stereospondyli.

Stereospondylomorpha was first proposed by Yates and Warren (2000), who found Archegosauroidea and Stereospondyli to be sister taxa in their phylogenetic analysis.

Säve-Söderbergh used the name Labyrinthodontia in a strict sense (sensu stricto) to refer to Rhachitomi and Stereospondyli, excluding Embolomeri.

Ross J. Damiani.Early Triassic mastodonsaurids (Temnospondyli, Stereospondyli) from Western Australia, with remarks on mastodonsauroid palaeobiogeography.

As temnospondyls continued to flourish and diversify in the Late Permian (260.4 - 251.0 Mya), a major group called Stereospondyli became more dependent on life in the water.

However, according to Schoch and Milner's phylogeny, Archegosauroidea is a paraphyletic group of taxa that are successively basal to Stereospondyli, rather than a monophyletic sister taxon.

Rhachitomi is defined to include four major and well-supported clades of temnospondyls: Dvinosauria, Eryopidae, Stereospondyli and a clade formed by Zatracheidae and Dissorophoidea.

A similar clade is Archegosauriformes, named by Schoch and Milner (2000), which includes Stereospondyli and some Permian temnospondyls that are similar in appearance to stereospondyls, including the archegosauroids.

Limnarchia included a group of small-bodied aquatic temnospondyls called Dvinosauria as the most basal members of the clade, followed by the large-bodied Archegosauroidea and the diverse Stereospondyli, which together formed the clade Stereospondylomorpha.