Amphibamiformes


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

Diagnosis

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

Definition

The most inclusive clade containing Amphibamus grandiceps but not Dissorophus multicinctus.

Phylogeny

Simplified phylogeny of Dissorophoidea from Schoch :
The phylogeny of Amphibamiformes has historically been relatively unresolved. Below are earlier analyses that recover slightly different topologies :

Fröbisch & Reisz (2008)

Anderson et al. (2008)