okoniensis, Coregonus lavaretus holsatus forma Kulmatycki [W. J.] 1926:288, 325 [Archiwum hydrobiologii i rybactwa [Archives d'Hydrobiologie et d'ichtyologie] v. 1 (no. 4); ref. 19638] Lake Wielkie-Okoninskie, Poland. Syntypes: whereabouts unknown. •Synonym of Coregonus lavaretus (Linnaeus 1758) -- (Berg 1948:383 [ref. 12882]). •Synonym of Coregonus widegreni Malmgren 1863 -- (Kottelat 1997:119 [ref. 22952]). Current status: Synonym of Coregonus widegreni Malmgren 1863. Salmonidae: Coregoninae. Habitat: freshwater, brackish, marine.