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The dissorophoid temnospondyl Parioxys ferricolus from the early Permian (Cisuralian) of Texas

Published online by Cambridge University Press:  31 March 2022

Rainer R. Schoch Open the ORCID record for Rainer R. Schoch [Opens in a new window]  and
Hans-Dieter Sues Open the ORCID record for Hans-Dieter Sues [Opens in a new window]
Rainer R. Schoch*
Affiliation:
Staatliches Museum für Naturkunde, Rosenstein 1, D-70191 Stuttgart, Germany University of Hohenheim, Wollgrasweg 23, D-70599 Stuttgart, Germany
Hans-Dieter Sues
Affiliation:
Department of Paleobiology, National Museum of Natural History, MRC 121, P.O. Box 37012, Washington, DC 20013-7012, USA
*
*Corresponding author.
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Abstract

Parioxys ferricolus Cope, 1878 is a long-neglected taxon of dissorophid temnospondyls from the early Permian (Cisuralian) of Texas. Reexamination of the original material and preparation of a previously undescribed specimen shed some light on the ontogeny and reveal numerous eucacopine features. P. ferricolus is characterized by: (1) a preorbital region 1.5 times as long as the posterior skull table in juveniles and twice as long in adults, (2) a parietal only two-thirds the length of the frontal, (3) interpterygoid vacuities shorter than half the skull length, (4) choanae posteriorly extended, and (5) vomer with enlarged, V-shaped median depression. P. ferricolus is found nested with Kamacops acervalis Gubin, 1980, with which it shares synapomorphies in the palate, within the dissorophid clade Eucacopinae.

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Journal of Paleontology , Volume 96 , Issue 4 , July 2022 , pp. 950 - 960
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Copyright © The Author(s), 2022. Published by Cambridge University Press on behalf of The Paleontological Society

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