Omalium caesum Gravenhorst, 1806

Shavrin, Alexey V., 2025, Review of the genus Omalium Gravenhorst, 1802 (Coleoptera: Staphylinidae: Omaliinae: Omaliini) of Siberia and Far Eastern Russia, with notes on some species from Mongolia and Japan, Zootaxa 5646 (2), pp. 199-235 : 207

3.2.2.1. Omalium caesum Gravenhorst, 1806

Omalium caesum Gravenhorst, 1806: 209 .

Omalium impressum Heer, 1839: 176 .

Omalium corticinum Motschulsky, 1858: 492 .

Omalium flavicorne Roubal, 1930: 309 .

For other references see Herman (2001a).

Remarks. Omalium caesum is widely distributed in the Palaearctic region ( Schülke & Smetana 2015). It was recorded from Sverdlovsk ( Belskaya & Solodovnikov 2003; Ermakov et al. 2017) and Tyumen areas ( Bukhkalo et al. 2012), and Kamchatka Territory ( Lobkova & Semenov 2015). Shavrin (2010) recorded it from Khanty-Mansi Autonomous Region and Krasnoyarsk Territory, but these specimens were misidentified with O. rivulare and O. strigicolle (see below). Eppelsheim (1887) recorded it from “ Amur: Askold.”, but it seems to be a possible misidentification.