Full reference: C. W. Gilmore. 1909. A new rhynchocephalian reptile from the Jurassic of Wyoming, with notes on the fauna of "Quarry 9". Proceedings of the United States National Museum 37(1698):35-42
Parent taxon: Sphenodontia according to R. Allain et al. 2022
See also Apesteguia et al. 2012, Apesteguía and Novas 2003, Carroll 1988, Cau et al. 2014, Gilmore 1909, Hay 1930, Herrera-Flores et al. 2018, Hsiou et al. 2019, Rauhut et al. 2012 and Reynoso and Cruz 2014
Sister taxa: Diphydontosaurus, Eusphenodontia, Godavarisaurus, Lamarquesaurus, Micromenodon, Pelecymala, Planocephalosaurus, Rebbanasaurus, Sauranodonti, Sphenocondor, Tingitana, Whitakersaurus
Subtaxa: Opisthias rarus
Type: Opisthias rarus
Ecology:
Distribution:
• Cretaceous of France (1 collection), the United Kingdom (1)
• Jurassic to Cretaceous of South Africa (1)
• Jurassic of Mexico (6), United States (19: Colorado, Utah, Wyoming)
Total: 28 collections including 29 occurrences
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.