Eryopiformes is a group of

rhachitomi Rhachitomi is a group of temnospondyl amphibians that includes all temnospondyls except edopoids and dendrerpetontids. It was established as a clade name by German paleontologist Rainer R. Schoch in 2013, although the name had first been esta ...

temnospondyl Temnospondyli (from Greek τέμνειν, ''temnein'' 'to cut' and σπόνδυλος, ''spondylos'' 'vertebra') is a diverse order of small to giant tetrapods—often considered primitive amphibians—that flourished worldwide during the Carb ...

amphibians. Eryopiformes was named by the German paleontologist

Rainer R. Schoch Rainer may refer to: People * Rainer (surname) * Rainer (given name) Other * Rainer Island, an island in Franz Josef Land, Russia * 16802 Rainer, an asteroid * Rainer Foundation, British charitable organisation See also

* Rainier (disambigua ...

in 2013. He defined it as a

node-based taxon Phylogenetic nomenclature is a method of nomenclature for taxa in biology that uses phylogenetic definitions for taxon names as explained below. This contrasts with the traditional approach, in which taxon names are defined by a ''type'', which c ...

to include

Eryopidae Eryopidae were a group of medium to large amphibious temnospondyli, known from North America and Europe. They are defined as all eryopoids with interpterygoid vacuities (spaces in the interpterygoid bone) that are rounded at the front; and larg ...

and

Stereospondylomorpha Stereospondylomorpha is a clade of temnospondyls. It includes the superfamily Archegosauroidea and the more diverse group Stereospondyli. Stereospondylomorpha was first proposed by Yates and Warren (2000), who found Archegosauroidea and Stereo ...

. Unlike previous analyses, a

phylogenetic In biology, phylogenetics (; from Greek φυλή/ φῦλον [] "tribe, clan, race", and wikt:γενετικός, γενετικός [] "origin, source, birth") is the study of the evolutionary history and relationships among or within groups o ...

analysis he performed found no support for a

monophyletic In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic ...

Euskelia Euskelia is a clade of extinct Temnospondyl amphibians. ''Euskelia'' is a stem-based taxon including all temnospondyls more closely related to ''Eryops'' than to ''Parotosuchus ''Parotosuchus'' is an extinct genus of capitosaurian temnospond ...

, that is defined to include

Dissorophoidea Dissorophoideans are a clade of medium-sized, temnospondyl amphibians that appeared during the Moscovian in Euramerica, and continued through to the Late Permian and the Early Triassic of Gondwana. They are distinguished by various details of t ...

and

(and also usually includes

Zatracheidae Zatracheidae (sometimes mistakenly spelled Zatrachydidae or Zatrachysdidae) is a family of Late Carboniferous and Early Permian temnospondyl amphibians known from North America and Europe. Zatracheidids are distinguished by lateral (sideways) bon ...

), in relation to Stereospondylomorpha. In this analysis, Eryopidae and Stereospondylomorpha usually formed a monophyletic clade that excludes the clade formed by

and

. Thus, he named this newly identified group as Eryopiformes.

References

Rhachitomes Carboniferous temnospondyls Permian temnospondyls Triassic temnospondyls Jurassic temnospondyls Cretaceous temnospondyls {{temnospondyli-stub