Temporal range: Middle Permian, Ufimian
B. priscus was first named in 1838 and was traditionally classified in the Anteosauria, a group of carnivorous dinocephalians. Brithopus served as the basis for the family Brithopodidae, which once included many anteosaurian species. Because it is based on fragmentary material, Brithopus is regarded as a nomen dubium by some researchers. Brithopus was later considered a possible estemmenosuchid, a type of herbivorous tapinocephalian therapsid.
Rhopalodon murchisoni, a junior synonym of Brithopus priscus, was described in 1845 by Johann Fischer von Waldheim, first as a species of Rhopalodon, but later assigned to its own genus, Dinosaurus, by Fischer in 1847. In 1894, Harry Govier Seeley referred a femur to the genus "Dinosaurus", though this has since been found to belong to Phreatosuchus qualeni.
The name "Dinosaurus" was later used by Ludwig Rütimeyer (1856) for a new specimen of a prosauropod dinosaur, which he named "Dinosaurus gresslyi". However, the name was not attached to any formal description and so was an invalid nomen nudum. The prosauropod was formally named Gresslyosaurus ingens, and is now considered a junior synonym of Plateosaurus.
- Olson, E.C. (1962). "Late Permian terrestrial vertebrates, U.S.A. and U.S.S.R." Transactions of the American Philosophical Society, New Series, 52: 1–224.
- Kammerer, C. F. 2010. Systematics of the Anteosauria (Therapsida: Dinocephalia). Journal of Systematic Palaeontology, 9, 261-304.
- Kammerer, C.F. (2011). "Systematics of the Anteosauria (Therapsida: Dinocephalia)". Journal of Systematic Palaeontology. 9 (2). doi:10.1080/14772019.2010.492645.
- Battail, B., and Surkov, M. V. (2000). "Mammal-like reptiles from Russia." The Age of Dinosaurs in Russia and Mongolia, 86-119.
- Fischer de Waldheim, J. (1847). "Notice sur quelques Sauriens de l'Oolithe du Gouvernement de Simbirsk." Bulletin de la Societe des Naturalistes de Moscou, Tome XX pt l (Rhinosaurus Jasikovü, Ool.)
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