The carpus and tarsus of the early Permian synapsid Sphenacodon ferox (Eupelycosauria: Sphenacodontidae)

ASU Author/Contributor (non-ASU co-authors, if there are any, appear on document)
Andrew B. Heckert Ph.D., Professor (Creator)
Appalachian State University (ASU )
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Abstract: The carpus and tarsus of the sphenacodontid synapsid Sphenacodon ferox are described in detail for the first time on the basis of nearly complete, loosely articulated examples from an incomplete, partially articulated skeleton from the Lower Permian El Cobre Canyon Formation of the Cutler Group of north-central New Mexico. On the one hand, the carpus and tarsus of S. ferox are compared to those of the more derived Dimetrodon and only member of Sphenacodontidae in which these structures are otherwise known adequately, and, on the other, to Haptodus, the sole member of the sister taxon of Sphenacodontoidea (Sphenacodontidae plus Therapsida). In order to recognize possible morphological trends in the carpus and tarsus within the combined clades of Haptodus and Sphenacodontidae, members of the sister clades Ophiacodontidae and Varanopseidae are utilized for outgroup comparison.

Additional Information

Henrici, A.C., Berman, D.S., Lucas, S.G., Heckert, A.B., Rinehart, L.F, and Zeigler, K.E., (2005) The carpus and tarsus of the early Permian synapsid Sphenacodon ferox (Eupelycosauria: Sphenacodontidae), New Mexico Museum of Natural History and Science Bulletin 30 (The Nonmarine Permian) p. 106-110. (ISSN 1524-4156) Archived in NC DOCKS with permission of the editor. The version of record is available at:
Language: English
Date: 2005

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