New records of beetles from families Haliplidae, Dytiscidae, Hydraenidae, Helophoridae, Hydrophilidae, Scirtidae and Chrysomelidae (Coleoptera) from the North Caucasus

Three species of beetles are recorded for Russia for the first time: Hydraena pontica Janssens, 1963 (Hydraenidae), Helophorus hilaris Sharp, 1916 (Helophoridae), Laccobius obscuratus Rottenberg, 1874 (Hydrophilidae). Two species are recorded for the first time for the North Caucasus: Haliplus sibiricus Motschulsky, 1860 (Haliplidae), Hydroporus nigellus Mannerheim, 1853 (Dytiscidae). Four species are recorded for the first time for North Ossetia and Kabardino-Balkaria: Helophorus discrepans Rey, 1885 (Helophoridae), Chaetarthria seminulum (Herbst, 1797) (Hydrophilidae), Contacyphon padi (Linnaeus, 1758) (Scirtidae), Plateumaris sericea caucasica (Zaitzev, 1930) (Chrysomelidae). Distributional data about three new species for North Ossetia are given: Helophorus faustianus Sharp, 1916 (Helophoridae), Enochrus affinis (Thunberg, 1794), Sphaeridium lunatum Fabricius, 1792 (Hydrophilidae); and five species for Kabardino-Balkaria: Agabus congener (Thunberg, 1794), Hydroporus incognitus Sharp, 1869, Hygrotus inaequalis (Fabricius, 1777) (Dytiscidae), Anacaena lutescens (Stephens, 1829) (Hydrophilidae), Contacyphon variabilis (Thunberg, 1787) (Scirtidae). General distribution of Hydroporus incognitus and H. nigellus and their association with mountain peat bog habitats in the North Caucasus, which considered herein as postglacial relict ecosystems, allows to assume that the postglacial colonization is the most likely way for these species into the Caucasus region.