Amphibamiformes is an unranked clade with

Dissorophoidea Dissorophoidea is 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 the ...

created by Schoch (2018). It encompasses all of the taxa traditionally considered to be "

amphibamids The Amphibamidae are an ancient 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 ...

" (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 Olsoniformes is an extinct clade of dissorophoid temnospondyls, including the families Dissorophidae and Trematopidae. Most members of the clade were highly adapted to a terrestrial lifestyle. The clade was named in 2008 and is defined as the ...

, which comprises dissorophids and trematopids.

Description

Amphibamiformes are diagnosed by a palatine and ectopterygoid reduced to narrow struts, a laterally-expanded interpterygoid vacuity, a humerus length-to-waist ratio of 6:10, and an absent basioccipital and supraoccipital.

Definition

A node-based clade; the most inclusive clade containing ''Amphibamus grandiceps'' but not '' Dissorophus multicinctus''.

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 , 'gill' and , 'lizard') is a genus of small, prehistoric amphibians. Fossils have been discovered in strata dating from the late Pennsylvanian Epoch to the Permian Period. The taxa may be invalid; the material refe ...

'', a branchiosaurid of the

late Carboniferous Late or LATE may refer to: Everyday usage * Tardy, or late, not being on time * Late (or the late) may refer to a person who is dead Music * Late (The 77s album), ''Late'' (The 77s album), 2000 * Late (Alvin Batiste album), 1993 * Late!, a pseudo ...

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

Illinois Illinois ( ) is a U.S. state, state in the Midwestern United States, Midwestern United States. It borders on Lake Michigan to its northeast, the Mississippi River to its west, and the Wabash River, Wabash and Ohio River, Ohio rivers to its ...

'' 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 (Urban Zakapa album), ''01'' (Urban Zakapa album), 2011 * ''01011 ...

Texas Texas ( , ; or ) is the most populous U.S. state, state in the South Central United States, South Central region of the United States. It borders Louisiana to the east, Arkansas to the northeast, Oklahoma to the north, New Mexico to the we ...

; 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'', a micropholid of the

early Triassic The Early Triassic is the first of three epochs of the Triassic Period of the geologic timescale. It spans the time between 251.9 Ma and Ma (million years ago). Rocks from this epoch are collectively known as the Lower Triassic Series, which ...

South Africa South Africa, officially the Republic of South Africa (RSA), is the Southern Africa, southernmost country in Africa. Its Provinces of South Africa, nine provinces are bounded to the south by of coastline that stretches along the Atlantic O ...

and Antarctica

References

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