1. Osborn, H. F., Bull. Amer. Mus. Nat. Hist., 24, 255 (1908).
2. Osborn, H. F., Bull. Amer. Mus. Nat. Hist., 26, 415 (1909).
3. Schlosser, M., Beitr. Palaont. und Geol. Osterreich-Ungarns, 24, 51 (1911).
4. Andrews, C. W., Brit. Mus. (Nat. Hist.) Mono., 1 (1906).
5. Named in reference to the Egyptian provenance of the type.