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Reassessment of ‘Captorhinikos’ chozaensis, an early Permian (Cisuralian: Kungurian) captorhinid reptile from Oklahoma and north-central Texas

Published online by Cambridge University Press:  25 March 2024

Jason P. Jung  and
Hans-Dieter Sues Open the ORCID record for Hans-Dieter Sues [Opens in a new window]
Jason P. Jung
Affiliation:
Department of Biological Sciences, California State University, San Bernardino, 5500 University Parkway, San Bernardino, California 92407, USA
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

‘Captorhinikos’ chozaensis Olson, 1954 is a captorhinid eureptile with multiple tooth rows from the lower Permian (Cisuralian: Kungurian) Clear Fork Group of north-central Texas and the Hennessey Formation of Oklahoma. It has five maxillary and four dentary tooth rows. We re-examined the available specimens referred to ‘Captorhinikos’ chozaensis to elucidate aspects of its skeletal structure and assess its phylogenetic relationships. Our parsimony analysis confirmed previous suggestions that this taxon is not referable to the same taxon as Captorhinikos valensis Olson, 1954 (type species of the genus) and ‘Captorhinikos’ parvus Olson, 1970 and thus is placed in its own new genus, Sumidadectes. It also recovered Sumidadectes chozaensis n. comb. as the earliest-diverging moradisaurine captorhinid.

UUID: http://zoobank.org/0f89869a-1889-4d90-b721-a89ba5f40c4b

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Journal of Paleontology , Volume 98 , Issue 1 , January 2024 , pp. 115 - 127
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Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Paleontological Society

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