dinosaurs for the first time. He considered Palaeosaurus platyodon to be synonymous with Thecodontosaurus antiquus, most likely due to the Thecodontosaurus bones that Owen assigned to the former genus. However, Huxley regarded P. cylindrodon as an unrelated carnivorous theropod. American paleontologist Edward Drinker Cope named a third species, Palaeosaurus fraserianus, in 1878, for an isolated tooth found in Triassic rocks in Pennsylvania. Today these are regarded as belonging to an indeterminate sauropodomorph dinosaur unrelated to Palaeosaurus. In 1881, a fourth species is created, Palaeosaurus stricklandi; these are now recognized to be those of a phytosaur. Twentieth century Von Huene, in 1908, recognized the tooth of Palaeosaurus platyodon belonged to a phytosaur and placed it into the new genus Rileya, forming the new combination Rileya platyodon. One of the holotype teeth of P. cylindrodon, presumably BRSMG *Ca7448/3, was destroyed during World War II, in 1940. The other tooth survives to this day. In 1959 German paleontologist Oskar Kuhn, for the first time since 1840, recognized that the genus Palaeosaurus created by Riley and Stutchbury in 1836 was preoccupied and created the new generic name Palaeosauriscus to contain Palaeosaurus cylindrodon and all other species that had previously been described under Palaeosaurus. In 1964, Owen's mis-classified specimens caused American Edwin Harris Colbert to classify prosauropods into two groups – Palaeosauria, which included Palaeosaurus and Teratosaurus, thought to be carnivorous because of the chimaeric nature of Palaeosaurus; and Plateosauria, which included Thecodontosaurus and Plateosaurus, which had been described with the correct skulls, and therefore were correctly described as a herbivorous group. Twenty-first century Thecodontosaurus was redescribed by a team of paleontologists led by Michael Benton in 2000, which placed Owen's mis-classified material under the genus Thecodontosaurus rather than Palaeosaurus, and this is still followed today. Most of the skeletal bones ever assigned to Palaeosaurus cylindrodon and P. platyodon were also reassigned to Thecodontosaurus. The genera Rileya and Palaeosauriscus, as well as the species Palaeosaurus cylindrodon and Palaeosaurus platyodon, were all declared nomina dubia. In 2007, Peter Galton, reviewing the archosaurian fossils of the 1834 Bristol finds, reaffirmed the identification of the two teeth and humeri of Palaeosaurus platyodon (Rileya) as belonging to a phytosaur, and regarded P. cylindrodon (Palaeosauriscus) as an indeterminate archosaur. He agreed with Benton that Rileya is dubious, but suggested that Palaeosauriscus may be valid, based on its now-destroyed tooth with a "subcircular cross-section and fine, obliquely inclined denticles". Efraasia and