williamsoni, Coregonus Girard [C. F.] 1856:136 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 8; ref. 1809] Deschutes River, a tributary of Columbia River, Oregon, U.S.A. No types known. •Valid as Prosopium williamsoni (Girard 1856) -- (Lee et al. 1980:102 [ref. 22416], McAllister 1990:83 [ref. 14674], Page & Burr 1991:46 [ref. 18983], La Rivers 1994:325 [ref. 23389], Baxter & Stone 1995:186 [ref. 23374], Sigler & Sigler 1996:201 [ref. 25943], Thurow et al. 1997:1094 [ref. 25523], Scott & Crossman 1998:291 [ref. 24570], Fuller et al. 1999:255 [ref. 25838], Moyle 2002:243 [ref. 26449], Wydoski & Whitney 2003:87 [ref. 27816], Nelson et al. 2004:86 [ref. 27807], Scharpf 2006:32 [ref. 30386], McPhail 2007:392 [ref. 31199], Page & Burr 2011:393 [ref. 31215], Page et al. 2013:87 [ref. 32708], Page et al. 2023:83 [ref. 40505]). Current status: Valid as Prosopium williamsoni (Girard 1856). Salmonidae: Coregoninae. Distribution: Western North America. Habitat: freshwater.