New records of water beetles (Coleoptera: Helophoridae, Hydrophilidae, Hydraenidae) from Commander Islands Author Sazhnev, A. S. text Far Eastern Entomologist 2018 2018-08-06 365 26 30 http://dx.doi.org/10.25221/fee.365.2 journal article 10.25221/fee.365.2 2713-2196 7164212 CCD2A6E5-A7CD-4685-B29E-63D75D07D8E0 Cercyon ( Cercyon ) symbion Shatrovskiy, 1989 Figs 4–7 MATERIAL EXAMINED. Russia : Kamchatka krai , Aleutsky District, Commander Islands, Bering Island, cove Buyan, coast of Bering Sea, under decomposing seaweed, 25– 26.VII 2012, 5♂ , 9♀ (coll. A.S. Sazhnev); same locality, 21.VIII 2013 , 2♂ , 7♀ (coll. A.S. Sazhnev). NOTES . This species is recorded from Kamchatka krai for the first time. All specimens of Cercyon symbion were collected at a distance of 2–10 meters from water edge line ( Fig. 7 ) on the shore of Bering Sea under decomposing seaweed ( Laminaria , Fucus ), logs, and stones together with Creophilus maxillosus (Linnaeus, 1758) , Psammostiba sp. , Adota sp. , Aleochara nubis (Staphylinidae) , Lyrosoma sp. (Agyrtidae) , Hypnoidus sp. (Elateridae) , and Diptera larvae. DISTRIBUTION. Russian Far East ( Sakhalin Oblast’, Primorsky krai, Kamchatka krai ), Japan (Ryndevich, 2001; Ôhara & Jia, 2006; Fikáček et al ., 2015). Figs 4–7. Cercyon symbion . 4–6 –male genitalia, dorsal view: 4 – tegmen with parameres; 5 – penis; 6 – genital segment; 7 – habitat on Bering Island (cove Buyan coast of Bering Sea). Family Hydraenidae Mulsant, 1844 NOTES. This family is recorded from Commander Islands for the first time.