Amphibamiformes
Extinct clade of temnospondyls
From Wikipedia, the free encyclopedia
Amphibamiformes is an unranked clade with Dissorophoidea created by Schoch (2018).[2] It encompasses all of the taxa traditionally considered to be "amphibamids" (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.
| Amphibamiformes Temporal range: Probable descendant taxon Lissamphibia survives to present | |
|---|---|
| |
| Amphibamus grandiceps | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Tetrapoda |
| Order: | †Temnospondyli |
| Superfamily: | †Dissorophoidea |
| Clade: | †Amphibamiformes Schoch, 2018 |
| Subgroups | |
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):[2]
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)
| Amphibamiformes | |
Anderson et al. (2008)
| Amphibamiformes | |
Gallery
Gerobatrachus hottoni, of the early Permian of Texas; this may be a close relative of present-day amphibians
Rubeostratilia texensis, of the early Permian of Texas, an amphibamiform of uncertain relations
