28. A. coenosus (Panzer, 1798) [= tristis (Zenker, 1801)]

Bercio & Folwaczny 1979 (tristis Zenker); Alekseev & Sakhnov 2000 (tristis Zenk.).

Voucher specimens: 1 [Baltiysk, 25 May 2008].

Kaliningrad Region: Bagr. (Kämmershöfen), Zel. (Loppöhnen); Zel.

Comments: Rare and locally distributed species in the Kaliningrad Region, but widely distributed in the whole Baltic Region (Silfverberg 2010; Tamutis et al. 2011; Byk & Rutkiewicz 2017).