Phaanthosaurus is an extinctgenus of basalprocolophonidparareptile from early Triassic (Induan stage) deposits of Nizhnii Novgorod, Russian Federation. It is known from the holotypePIN 1025/1, a mandible (a dentary). It was collected from Vetluga River, Spasskoe village and referred to the Vokhmian terrestrial horizon of the . It was first named by P. K. Chudinov and B. P. Vjushkov in 1956 and the type species is Phaanthosaurus ignatjevi.[1][2]
In 2000, Spencer and Benton found Contritosaurus to be junior synonym of Phaanthosaurus. C. simus Ivakhnenko, 1974 which is known from the holotypePIN 3355/1, a partial skull with right mandible from the same location, and from three paratypes, was recombined as P. simus. They also found that the second species of Contritosaurus, C. convector (PIN 3357/1, a mandible) is a junior synonym of P. simus.[3] Recent cladistic analyses by Juan Carlos Cisneros, 2008 and Mark J. Macdougall and Sean P. Modesto, 2011 accepted this synonymy.[4][5]
References[]
^P. K. Chudinov and B. P. Vjushkov (1956). "New Data on Small Cotylosaurs from the Permian and Triassic of the USSR". Doklady Akademii Nauk SSSR. 108 (3): 547–550 [In Russian].CS1 maint: uses authors parameter (link)
^Ivakhnenko, M. F. (1974). "New data on Early Triassic procolophonids of the USSR". Paleontological Journal. 8: 346–351.CS1 maint: uses authors parameter (link)
^P. S. Spencer & M. J. Benton (2000). "Procolophonids from the Permo-Triassic of Russia". In M. J. Benton; M. A. Shishkin; D. M. Unwin & E. N. Kurochkin (eds.). The Age of Dinosaurs in Russia and Mongolia. Cambridge: Cambridge University Press. pp. 160–176. ISBN9780521554763.
^Mark J. Macdougall and Sean P. Modesto (2011). "New information on the skull of the Early Triassic parareptile Sauropareion anoplus, with a discussion of tooth attachment and replacement in procolophonids". Journal of Vertebrate Paleontology. 31 (2): 270–278. doi:10.1080/02724634.2011.549436. S2CID84934974.CS1 maint: uses authors parameter (link)
