Amphibamiformes is an unranked clade with Dissorophoidea created by Schoch (2018). It encompasses all of the taxa traditionally considered to be "

amphibamids The Amphibamidae are an extinct family of dissorophoid temnospondyls known from Late Carboniferous- Early Permian strata in the United States. Classification Amphibamidae has traditionally included small-bodied, terrestrial dissorophoids. The ...

" (subsequently restricted to '' Doleserpeton annectens'' and '' Amphibamus grandiceps'' by Schoch), branchiosaurids, and hypothetically lissamphibians under the traditional temnospondyl hypothesis of lissamphibian origins. These taxa are typically small-bodied dissorophoids and form the sister group to Olsoniformes, which comprises dissorophids and

trematopids Trematopidae is a family of dissorophoid temnospondyl spanning the late Carboniferous to the early Permian. Together with Dissorophidae, the family forms Olsoniformes, a clade comprising the medium-large terrestrial dissorophoids. Trematopids are ...

Diagnosis

(1) Palatine and ectopterygoid reduced to narrow struts; (2) interpterygoid vacuity greatly expanded laterally; (3) humerus length:waist ratio of 6:10; (4) basioccipital and supraoccipital absent.

Definition

The most inclusive clade containing ''Amphibamus grandiceps'' but not ''

Dissorophus multicinctus ''Dissorophus'' (DI-soh-ROH-fus) (meaning "double roof" for two layers of armor) is an extinct genus of temnospondyl amphibian that lived during the Early Permian Period about 273 million years ago. Its fossils have been found in Texas and in Ok ...

''.

Phylogeny

Simplified phylogeny of Dissorophoidea from Schoch (2018): The phylogeny of Amphibamiformes has historically been relatively unresolved. Below are earlier analyses that recover slightly different topologies (nomenclature adjusted to reflect current status and ranks):

Fröbisch & Reisz (2008)

Anderson et al. (2008)

Gallery

Branchiosaurus BW.jpg, ''

Branchiosaurus ''Branchiosaurus'' (from el, βράγχιον , 'gill' and el, σαῦρος , 'lizard') is a genus of small, lightly built early prehistoric amphibians. Fossils have been discovered in strata dating from the late Pennsylvanian Epoch to the ...

'', a

branchiosaurid Branchiosauridae is an extinct family of small amphibamiform temnospondyls with external gills and an overall juvenile appearance. The family has been characterized by hundreds of well-preserved specimens from the Permo-Carboniferous of Middle ...

of the late Carboniferous of central Europe Amphibamus BW.jpg, '' Amphibamus grandiceps'', an

amphibamid The Amphibamidae are an extinct Family (biology), family of Dissorophoidea, dissorophoid temnospondyls known from Late Carboniferous-Early Permian strata in the United States. Classification Amphibamidae has traditionally included small-bodied ...

of the late Carboniferous of Illinois'' Gerobatrachus NT.jpg, '' Gerobatrachus hottoni'', of the

early Permian 01 or '01 may refer to: * The year 2001, or any year ending with 01 * The month of January * 1 (number) Music * '01 (Richard Müller album), 01'' (Richard Müller album), 2001 * 01 (Son of Dave album), ''01'' (Son of Dave album), 2000 * 01 (Urban ...

of Texas; this may be a close relative of present-day amphibians Rubeostratilia texensis.jpg, '' Rubeostratilia texensis'', of the early Permian of Texas, an amphibamiform of uncertain relations Micropholis stowi.jpg, ''

Micropholis stowi ''Micropholis'' (Greek mikros = small and pholis = scale) is an extinct genus of dissorophoid temnospondyl. Fossils have been found from the ''Lystrosaurus'' Assemblage Zone of the Karoo Basin in South Africa and are dated to the Induan ...

'', a micropholid of the early Triassic of South Africa and Antarctica

References

Dissorophoids Carboniferous temnospondyls Permian temnospondyls Triassic temnospondyls {{Temnospondyli-stub