Prosopium Jordan [D. S.] (ex Milner) 1878:361 Neut. Coregonus quadrilateralis Richardson 1823. Type by subsequent designation. Type designated by Jordan & Gilbert 1883:297 [ref. 2476]. •Valid as Prosopium Jordan 1878 -- (Kendall & Behnke 1984:144 [ref. 13638], Stearley & Smith 1993:19 [ref. 26683], Reshetnikov 1998:47 [ref. 23570], Mecklenburg et al. 2002:179 [ref. 25968], Bogutskaya & Naseka 2004:144 [ref. 28183], Scharpf 2006:32 [ref. 30386], Parin et al. 2014:127 [ref. 33547], Bogdanov & Knizhin 2022:1695 [ref. 40154]). Current status: Valid as Prosopium Jordan 1878. Salmonidae: Coregoninae.