Lucaninae Latreille, 1806

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 : 119-120

Subfamily Lucaninae Latreille, 1806 Tribe Platycerini Mulsant, 1842 Genus Platycerus Geoffroy, 1762

3. P. caprea (DeGeer, 1774)

Voucher specimens: 10 [Cherniakhovsk, 02 May 1988;Svetlogorsk, 11June 1997;Otradnoe, 30 June 2008, 2 exx; Bogdanovka, 31 May – 16 June 2009, 2 exx; 5 km NE Cherniakhovsk, 17 May 2010; 3 km NE Zelenogradsk, 23 May 2010; 4 km NE Zelenogradsk, 23 May – 13 June 2012; 1 km E Cherniakhovsk, 30 April 2018].

Kaliningrad Region: Bagr., Chern., Zel.

Comments: The certain findings of the species in Eastern Prussia were unknown, the presence of the species in the regional fauna was expected

only (Bercio & Folwaczny 1979). Widespread in Baltic States and Fennoscandia ( Silfverberg 2010). The formally first report of the species in the Kaliningrad Region .

Sporadically distributed, occasional species, known from scattered localities in various parts of the Region. Occurs in the shady and humid mixed forest stands, often on forested slopes of ravines. The species develops ( Nikitsky 2016) in the lying on the ground twigs and logs of deciduous trees ( Betula , Alnus , Salix , Fagus , Quercus ). The species is considered ( Nieto & Alexander 2010) “least concern” at the European level. According to randomly selected regional material of the genus Platycerus in the collection, the species is wider distributed and more often encountered than P. caraboides .

4. P. caraboides caraboides (Linnaeus, 1758)

Bercio & Folwaczny 1979; Alekseev & Sakhnov 2000; Alekseev 2014.

Voucher specimens: 4 [Kolosovka, 04 May 2001; railway station “ 1312 km ”, 18 May 2010; ibidem, 02 May 2014 (female, var. rufipes (Herbst, 1790)) ; 2 km S Novomoskovskoe, 12 May 2014].

Kaliningrad Region: Chern. (Insterburg), Gur. (Königsberg), Gvard. (Wehlau), Nem. (Tilsit), Nest. (Rominten), Zel. (Rauschen, Wargen, Warnicken); Bagr., Zel.

Comments: The localities listed in Bercio & Folwaczny (1979) and mentioned above could surely concern both species, because these Platycerus sibling species were earlier not distinguished.

According to Nikitsky (2016) P. caraboides develops in stumps and trunks of deciduous trees ( Quercus , Tilia , Populus , Fagus , Carpinus , Betula ), adults occur on young leaves and twigs in Mai and June. Locally distributed and occasional species. Occurs in sparse mixed forests and on forest edges. The species is considered “least concern” at the European level ( Nieto & Alexander 2010).