pycnocentrus, Coregonus nilsonii Berg [L. S.] 1948:378 [Freshwater fishes of the U.S.S.R. and adjacent countries No. 27; ref. 12882] Appeared first as Coregonus nilsonii pycnocentrus Smitt 1886, see Kottelat 1997:118 [ref. 22952]. Not available, name only in synonymy. •In the synonymy of Coregonus nilssoni Valenciennes 1848 -- (Kottelat 1997:117 [ref. 22952]). Nomen Nudum. Current status: Synonym of Coregonus nilssoni Valenciennes 1848. Salmonidae: Coregoninae.