Amphibamiformes
extinct clade of temnospondyls (Temnospondyli)
Amphibamiformes is an unranked clade with Dissorophoidea created by Schoch (2018). 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.
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.
“Amphibamiformes” enters the record as extinct clade of temnospondyls (Temnospondyli). Crown Archives preserves that source wording while asking what Amphibamiformes, extinct and clade can confirm, complicate or overturn.
Why this record matters
“Amphibamiformes” is worth following because a concise public description often conceals a longer documentary argument. Here, Amphibamiformes, extinct and clade provides the most credible route into that argument.
Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Nov 6, 2025. The linked authority identifier is Q65081687. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2018 and 2008.
Overview language is designed for orientation and should not be treated as a substitute for the evidence cited beneath it. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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This entry incorporates text from “Amphibamiformes” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.