Ocyolinus Sharp, 1884

Chatzimanolis, Stylianos, 2017, An Update to the Diagnosis and Key to the Species of Ocyolinus Sharp (Coleoptera: Staphylinidae: Staphylininae: Staphylinini), with the Inclusion of Torobus principalis (Bernhauer), The Coleopterists Bulletin 71 (4), pp. 805-809 : 805-806

Ocyolinus Sharp, 1884

Ocyolinus Sharp 1884: 363 [species included: O. amethystinus Sharp , O. astenos Chatzimanolis and Ashe , O. dimoui Chatzimanolis and Ashe , O. ganglbaueri Bernhauer , O. nebulosus Chatzimanolis and Ashe, O. principalis (Bernhauer) , and O. rugatus Sharp ]; complete taxonomic history in Chatzimanolis and Ashe (2009).

Type species. Ocyolinus rugatus Sharp, 1884 ; Herman 2001a: 3582.

Diagnosis. This diagnosis incorporates elements from the diagnosis of Ocyolinus provided by Chatzimanolis and Ashe (2009), but it is updated to reflect the inclusion of O. principalis and my current understanding of Xanthopygina. The following characters in combination can distinguish Ocyolinus from all other genera in Xanthopygina: antennomeres 1–11 longer than wide; mandibles elongate, each with triangular tooth that is typically slightly different on the right and left mandible; maxillary and labial palpi dilated, but not securiform as in Dysanellus Bernhauer or Zackfalinus Chatzimanolis (see Chatzimanolis 2012 for illustrations); head subquadrate or slightly transverse; posterolateral angles of head rounded; neck prominent; head wider (or subequal) than pronotum; and terga V–VI without subbasal carinae.