Onthophagus medius, (Kugelann, 1792)

Alekseev, Vitalii I., 2018, Scarabaeoidea (Insecta: Coleoptera) Of The Kaliningrad Region (Russia): The Commented Actual Checklist, Assessment Of Rarity And Notes To Regional Protection, Acta Biologica Universitatis Daugavpiliensis 18 (2), pp. 111-152 : 134-135

(59). O. medius (Kugelann, 1792)

Lentz 1853; Lentz 1879 ( vacca L. medius Pz. ); Bercio & Folwaczny 1979 ( vacca ).

Kaliningrad Region: Gur. (Königsberg, Metgethen, Spittelhof, Wilkie), Nest. (Rominten), Zel. (Cranz, Rauschen).

Comments: The species “ O. vacca L. medius Pz. ” or “ O. vacca L.” is reported from the Region according to Lentz (1879) and Bercio & Folwaczny (1979). In the recent research of Rössner et al. (2010) the former species O. vacca (L.) is considered to consist of two sibling species: O. medius (Kugelann, 1792) occuring further north and reaching at least 54° of northern latitude and O. vacca (Linnaeus, 1767) , seemingly to be absent north of 50° latitude. The locality of the O. medius neotype is “Lyck, Ostpreussen” [now Ełk, Warmian-Masurian region, northeastern Poland]. In accordance with mentioned above, in the Kaliningrad Region should be expected only one species – O. medius (Kug.) . Therefore, the species O. vacca (L.) has been removed from the species list and the old data concerning its distribution was used for O. medius (Kug.) .

Formerly widespread in the Region species [“often” ( Lentz 1853) or “everywhere common” ( Lentz 1879)]. The speceis “ vacca (L.)” is reported in Belarus (Alexandovitch & Pisanenko 1991), Lithuania ( Tamutis et al. 2011), Sweden, Denmark ( Silfverberg 2010), Latvia ( Telnov 2004), the Moscow Region ( Nikitsky 2009), but it is very possible, part of these reports really concern O. medius (Kug.) .