64639 Coregonus lutokka Kottelat, Bogutskaya & Freyhof, 2005 Salmonidae Salmonids Coregoninae Salmoniformes Teleostei Europe: Lakes Ladoga and Onega, Russia. Introduced in many natural and artificial water bodies in European and Siberian parts of Russia. It is not yet clear whether populations from Lake Onega belong to this species or are part of an endemic species flock (Ref. 59043).