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1 September 2014 A New Species of the Parareptile Genus Delorhynchus, Based on Articulated Skeletal Remains from Richards Spur, Lower Permian of Oklahoma
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Abstract

Description of a new species of the parareptile genus Delorhynchus is based on a well-preserved partial subadult skeleton, an isolated adult skull, and disarticulated elements recently collected from the Lower Permian Richards Spur locality of Oklahoma, U.S.A. Delorhynchus cifellii, sp. nov., is distinguished from Delorhynchus priscus by the lack of an accessory articulating anterodorsal flange of the maxilla. The hypodigm of Delorhynchus cifellii reveals that Delorhynchus is distinguished from other parareptiles by cranial dermal sculpture consisting of a system of low, smooth tuberosities and a pattern of diffuse shallow, circular dimples. In a phylogenetic analysis of parareptiles, Delorhynchus cifellii is positioned as the sister species of Lanthanosuchoidea. Recognition of Delorhynchus cifellii. sp. nov., and its phylogenetic position among parareptiles highlights the significance of the Richards Spur locality in our understanding of the early evolutionary history of reptiles.

© 2014 by the Society of Vertebrate Paleontology
Robert R. Reisz, Mark J. MacDougall, and Sean P. Modesto "A New Species of the Parareptile Genus Delorhynchus, Based on Articulated Skeletal Remains from Richards Spur, Lower Permian of Oklahoma," Journal of Vertebrate Paleontology 34(5), 1033-1043, (1 September 2014). https://doi.org/10.1080/02724634.2013.829844
Received: 5 May 2013; Accepted: 1 July 2013; Published: 1 September 2014
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