It was a rather derivedbaurioid, with a robust skull, short tail, long limbs and relatively largecanines. It was apparently related toUrumchia and likeUrumchia, it hadvomer bones, which form the secondary palate, but they do not narrow to a tip like inUrumchia. However, it retained some primitive characteristics. It had sixincisor teeth in each side of the jaw, whereas other baurioids had less.[2] It was probably carnivorous, and ate insects and small vertebrates
Regisaurus was discovered in 1964 byJames W. Kitching and it was named in 1972 byC. H. Mendrez. Two species are known, thetype speciesRegisaurus jacobi and an additionalundescribed species.R. jacobi is known from the holotype FRP 1964/27 and the referred specimen BP/1/3973,[3] while the undescribed species is known only from the Holotype T837.[4][5]
^C. H. Mendrez (1972). "On the skull ofRegisaurus jacobi, a new genus and species of Bauriamorpha Watson and Romer 1956 (=Scaloposauria Boonstra 1953), from theLystrosaurus-zone of South Africa". In K. A. Joysey; T. S. Kemp (eds.).Studies in Vertebrate Evolution. Edinburgh: Oliver & Boyd. pp. 191–212.ISBN9780050021316.
