Smetana, A. (2009) Contributions to the knowledge of the “Staphylinus-complex” (Coleoptera: Staphylinidae: Staphylinini) of China. Part 21. The genus Ocypus Leach, 1819, subgenus Pseudocypus Mulsant & Rey, 1876. Section 4. Zootaxa, 2286 (1), 1–30.