taxonID	type	description	language	source
038787E8FFC1D660FEAFB54F2E77FE60.taxon	materials_examined	Type species: L. hamatus (Cope, 1895). Diagnosis: Same as for L. hamatus, the only valid species. Comment: Case (1911) erected Labidosaurus broilii for a specimen described by Broili (1904) and reposited in the Alte Akademie, Munich, and differentiated it from the type species on the basis of the subequal size of the first two premaxillary teeth. Seltin (1959) dem- onstrated that there is considerable variation in the relative size of these teeth in C. aguti, and concluded that L. broilii was an ‘ indeterminate’ species, which we have interpreted to mean it is a junior synonym of L. hamatus. Seltin (1959) erected Labidosaurus oklahomensis for a small single-tooth-rowed captorhinid specimen from the McCann Quarry, Oklahoma, but this taxon is now recognized as a junior synonym of Captorhinus laticeps (Heaton, 1979: fig. 4).	en	Modesto, Sean P., Scott, Diane M., Berman, David S., Müller, Johannes, Reisz, Robert R. (2007): The skull and the palaeoecological significance of Labidosaurus hamatus, a captorhinid reptile from the Lower Permian of Texas. Zoological Journal of the Linnean Society 149 (2): 237-262, DOI: 10.1111/j.1096-3642.2007.00242.x, URL: https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2007.00242.x
038787E8FFC1D660FC02B16828D3F8C0.taxon	diagnosis	Diagnosis: A single-tooth-rowed captorhinid distinguished by the following features: extreme angulation of the alveolar margin of the premaxilla, at roughly 45 ° to the long axis of the maxillary alveolar margin; a low dorsum sellae; an extensive, thin sagittal flange of the dorsum sellae that deeply invades the retractor pit and sella turcica; lateral exposure of prootic greatly reduced by the stapedial and opisthotic contacts and equal to about one-third of the entire lateral portion of the bone; slender stapes; and a small intermeckelian medius foramen that is bounded anteriorly by a small postsymphysial dorsal extension of the splenial. Holotype: AMNH 4341 (American Museum of Natural History, New York, NY, USA), a complete skull. Material examined: CM 73370 (Carnegie Museum of Natural History, Pittsburgh, PA, USA) (formerly ‘ UCLA VP 3167 ’; Vertebrate Palaeontology Collections, University of California, Los Angeles, CA, USA), greater part of an articulated skeleton that includes a complete, undistorted skull with tightly closed mandible; CM 73371 (formerly ‘ UCLA VP 3200 ’), greater part of an articulated skeleton that includes a complete, obliquely compressed skull, with partly detached left and fully detached right mandibular rami; CM 76876, a partial right mandibular ramus; FMNH UR 161 (Field Museum of Natural History, Chicago, IL, USA), a complete skull with detached braincase; MCZ 8727 (Museum of Comparative Zoology, Harvard University, Cambridge, MA, USA), a nearly complete skull that has undergone extreme dorsoventral compression. Horizon and geographical provenance: Lowermost strata (the ‘ Arroyo Formation’ of early literature) of the Clear Fork Group, Texas; Leonardian (= Artinskian), Lower Permian. CM 73370, 73371, and 76876, and FMNH UR 161 were collected by E. C. Olson from his ‘ Labidosaurus pocket’ locality (Coffee Creek, Baylor County, TX, USA). Specific locality data is missing for MCZ 8727, which was collected by ‘ Chas. H. Sternberg during 1882 in NW Texas’ (C. Schaff, pers. comm., 2005).	en	Modesto, Sean P., Scott, Diane M., Berman, David S., Müller, Johannes, Reisz, Robert R. (2007): The skull and the palaeoecological significance of Labidosaurus hamatus, a captorhinid reptile from the Lower Permian of Texas. Zoological Journal of the Linnean Society 149 (2): 237-262, DOI: 10.1111/j.1096-3642.2007.00242.x, URL: https://academic.oup.com/zoolinnean/article-lookup/doi/10.1111/j.1096-3642.2007.00242.x
