The type and only specimen of A. tigrinus consists of a fragmentary skull and fragmentary dentary.[5] The remains of A. buceros are unknown and are possibly now lost.
^(Owen, R. 1876. Descriptive and illustrated catalogue of the fossil Reptilia of South Africa in the collection of the British Museum. Taylor and Francis, London, xii + 88 pp
^Broom, R. 1911. On some new South African Permian reptiles. Proceedings of the Zoological Society of London, 1911, 1073–1082
^Weishampel, D. B., Barrett, P. M., Coria, R. A., Le Loeuff, J., Xing, X., Xijin, Z., ... & Noto, C. R. (2004). "Dinosaur distribution". In The Dinosauria: Second Edition (pp. 517-606).22 University of California Press.