verchoswirka, Coregonus ludoga var. Polyakov [I. S.] 1874:XXXI [Trudy St.-Peterburgskogo Obscestva Estestvoispytatelej = Travaux de la Société des Naturalistes de St. Pétersbourg. v. 5; ref. 19594] Not available, name only; from Lake Onega. Published in Pravdin 1931 as Coregonus ludoga werchoswirka. •Questionably in the synonymy Coregonus widegreni Malmgren 1863 -- (Kottelat 1997:119 [ref. 22952]). Nomen Nudum. Current status: Synonym of Coregonus widegreni Malmgren 1863. Salmonidae: Coregoninae.