Family Dytiscidae (atlas of beetles of Russia) Tribe Colymbetini (Coleoptera, Dytiscidae) Colymbetes dahuricus Aube, 1837 = Colymbetes dahuricus Aube, 1837:99 = Cymatopterus obscuratus Mannerheim, 1853:154 = Colymbetes seminiger LeConte, 1862:522