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Dissorophoid temnospondyl Parioxys from the Permian of Texas

Citation

Schoch, Rainer; Sues, Hans-Dieter (2022), Dissorophoid temnospondyl Parioxys from the Permian of Texas, Dryad, Dataset, https://doi.org/10.5061/dryad.tb2rbp02d

Abstract

Parioxys ferricolus 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 sheds some light on ontogeny and reveals 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) parietal only two-thirds the length of the frontal, and (3) interpterygoid vacuities shorter than half the skull length, (4) choanae posteriorly extended, and (5) vomer with enlarged, V-shaped medial depression. P. ferricolus is found nested with Kamacops acervalis, with which it shares synapomorphies in the palate, within the dissorophid clade Eucacopinae.

Methods

Character-taxon matrix and description of morphological characters.

Usage Notes

Data set was analyzed with TNT.