Sphenosaurus is a poorly known genus of procolophonid, a type of prehistoric reptile from the Late Permian Buntsanstein of Germany.F. A. Quenstedt. (1882). Handbook of Fossils viii-1239 Originally assigned the name Palaeosaurus sternbergii, by German paleontologist Leopold Joseph Fitzinger in 1840, the generic name was already preoccupied by not one but two other reptiles assigned the name Palaeosaurus.The story of Palaeosaurus and Thecodontosaurus from The Bristol Dinosaur ProjectA series of posts to the Dinosaur Mailing List by George Olshevsky, regarding the history of Palaeosaurus, including Sphenosaurus: 1 2 3 4 In 1847, Hermann von Meyer recognized the original 1833 and 1836 usages of Palaeosaurus and moved P. sternbergii to a new genus, Sphenosaurus.H. v. Meyer. (1855). The Fauna of the Ancient World. The Saurians of the Muschelkalk with Regard to the Saurians of the Buntem Sandstone and Keuper viii-167
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