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Article: A new small captorhinid reptile from the lower Permian of Oklahoma and resource partitioning among small captorhinids in the Richards Spur fauna

Papers in Palaeontology - Volume 4 Part 2 - Cover Image
Publication: Palaeontology
Volume: 4
Part: 2
Publication Date: May 2018
Page(s): 293 307
Author(s): Sean P. Modesto, Diane Scott, and Robert R. Reisz
DOI: 10.1002/spp2.1109
Addition Information

How to Cite

MODESTO, S.P., SCOTT, D., REISZ, R.R. 2018. A new small captorhinid reptile from the lower Permian of Oklahoma and resource partitioning among small captorhinids in the Richards Spur fauna . Papers in Palaeontology, 4, 2, 293-307. DOI: 10.1002/spp2.1109

Author Information

  • Sean P. Modesto - Department of Biology Cape Breton University Sydney NS B1P 6L2 Canada
  • Sean P. Modesto - Sam Noble Oklahoma Museum of Natural History Norman OK 73072 USA
  • Diane Scott - Department of Biology University of Toronto Mississauga 3359 Mississauga Road Mississauga ON L5L 1C6 Canada
  • Robert R. Reisz - Sam Noble Oklahoma Museum of Natural History Norman OK 73072 USA
  • Robert R. Reisz - Department of Biology University of Toronto Mississauga 3359 Mississauga Road Mississauga ON L5L 1C6 Canada
  • Robert R. Reisz - International Center of Future Science DERC Jilin University Changchun 130012 China

Publication History

  • Issue published online: 07 May 2018
  • Manuscript Accepted: 01 January 2018
  • Manuscript Received: 20 July 2017

Funded By

Natural Sciences and Engineering Research Council of Canada
Canadian Foundation for Innovation
Nova Scotia Research and Innovation Trust

Online Version Hosted By

Wiley Online Library
Get Article: Wiley Online Library [Pay-to-View Access] |

Abstract

Two partial reptile skulls and six dentigerous fragments from the lower Permian Richards Spur locality of Oklahoma represent a new genus and species of small captorhinid reptile. Labidosauriscus richardi gen. et sp. nov. is distinguished from other captorhinids in the reduction of the height of the ridges forming the characteristic net‐like, ridge‐and‐pit cranial sculpturing of captorhinids, and the superimposition of a system of finer pits and furrows over the primary ridge‐and‐pit cranial ornamentation. Labidosauriscus richardi shares with Claticeps a post‐caniniform tooth morphology characterized by convex mesial and distal carinae that form a distinctly asymmetrical apex in labial aspect. The description of Lrichardi brings to six the number of captorhinid species known from the productive Richards Spur fissure‐fill locality. Each of these species exhibits a distinctive post‐caniniform tooth morphology (or multiplication of these teeth), which is consonant with the hypothesis of resource partitioning among the small faunivorous and omnivorous captorhinids at Richards Spur. As an ‘exhumed early Permian hill’, Richards Spur provides a unique window into early reptile diversification in a distinctive upland environment that is rarely preserved in the tetrapod fossil record.

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