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).

Published as part of Alekseev, Vitalii I., 2018, Scarabaeoidea (Insecta: Coleoptera) Of The Kaliningrad Region (Russia): The Commented Actual Checklist, Assessment Of Rarity And Notes To Regional Protection, pp. 111-152 in Acta Biologica Universitatis Daugavpiliensis 18 (2) on page 120, DOI: 10.5281/zenodo.10979877