Smetana, A. “Contributions to the Knowledge of the “Staphylinus-Complex” (Coleoptera: Staphylinidae: Staphylinini) of China. Part 21. The Genus Ocypus Leach, 1819, Subgenus Pseudocypus Mulsant &Amp; Rey, 1876. Section 4”. Zootaxa, vol. 2286, no. 1, Nov. 2009, pp. 1–30, doi:10.11646/zootaxa.2286.1.1.