Seven species have been referred to this genus over the years, which have since been reassigned to other genera: * Palaeoscincus africanus, named by Robert Broom in 1910/1912,[2] a partial jaw from the Tithonian-Valanginian-age Upper Jurassic-Lower Cretaceous Kirkwood Formation of South Africa, now known as the stegosaurid Paranthodon;[3] * Palaeoscincus asper, "the rough one", a dubious tooth taxon from the late Campanian-age Upper Cretaceous Dinosaur Park Formation of Alberta, Canada, named by Lawrence Morris Lambe in 1902,[4] based on a single tooth, specimen NMC 1349 now referred to Euoplocephalus;[5] * Palaeoscincus costatus, "the ribbed one", the type species named by Leidy in 1856, known from a single tooth, specimen ANSP 9263 found by Ferdinand Vandiveer Hayden near Fort