A reassessment of the temnospondyl amphibian Perryella olsoni from the Lower Permian of Oklahoma
Identifieur interne : 007032 ( Main/Exploration ); précédent : 007031; suivant : 007033A reassessment of the temnospondyl amphibian Perryella olsoni from the Lower Permian of Oklahoma
Auteurs : Marcello Ruta [Royaume-Uni] ; John R. BoltSource :
- Earth and Environmental Science Transactions of the Royal Society of Edinburgh [ 0263-5933 ] ; 2006-06.
Abstract
Additional mechanical preparation of the type material of the temnospondyl amphibian Perryella olsoni (Lower Permian, Wellington Formation, Oklahoma) highlights new cranial and postcranial features and provides additional data on previously known structures. Important new information is available for the quadrate, palatal bones and their associated dentition, parasphenoid, and appendicular skeleton. The revised diagnosis and redescription of Perryella provide the basis for a re-evaluation of its systematic affinities. A cladistic analysis of (mostly) Carboniferous and Permian temnospondyls, together with several Devonian and Carboniferous stem tetrapod outgroups, supports a single origin for temnospondyls. The sequence of branching events within temnospondyls consists of: (1) a paraphyletic Edopoidea; (2) a clade of Zatracheidae, Eryopidae, and basal Archegosauriformes; (3) a monophyletic Dvinosauria; and (4) a monophyletic Dissorophoidea. Perryella is nested within Dvinosauria in an intermediate position between Trimerorhachidae and Dvinosauroidea.
Url:
DOI: 10.1017/S0263593300001437
Affiliations:
Links toward previous steps (curation, corpus...)
- to stream Istex, to step Corpus: 000A72
- to stream Istex, to step Curation: 000A72
- to stream Istex, to step Checkpoint: 002D33
- to stream Main, to step Merge: 007159
- to stream Main, to step Curation: 007032
Le document en format XML
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