cognatus, Cottus Richardson [J.] 1836:40 [Fauna Boreali-Americana Part 3; ref. 3731] Great Bear Lake, Canada, 64.5°N. Syntypes: (many) MNHN 0000-6540 (1). Type catalog: Blanc & Hureau 1968:50-51 [ref. 20738]. •Valid as Cottus cognatus Richardson 1836, subspecies cognatus -- (Chereshnev et al. 2001:118 [ref. 26736]). •Valid as Cottus cognatus Richardson 1836 -- (Lee et al. 1980:808 [ref. 22416], Sideleva 1982:82 [ref. 14469], Smith 1986:356 [ref. 22186], McAllister 1990:196 [ref. 14674], Page & Burr 1991:249 [ref. 18983], Jenkins & Burkhead 1994:647 [ref. 21581], Stauffer et al. 1995:252 [ref. 23376], Chereshnev 1996:606 [ref. 24659], Reshetnikov et al. 1997:758 [ref. 24702], Sideleva 1998:151 [ref. 23595], Scott & Crossman 1998:830 [ref. 24570], Kinziger et al. 2000:1007 [ref. 25019], Lyons et al. 2000:42 [ref. 26594], Sheiko & Fedorov 2000:27 [ref. 25650], Bogutskaya et al. 2001:46 [ref. 26178], Mecklenburg et al. 2002:468 [ref. 25968], Parin et al. 2002:S72 [ref. 28300], Wydoski & Whitney 2003:207 [ref. 27816], Bailey et al. 2004:171 [ref. 27882], Nelson et al. 2004:119 [ref. 27807], Bogutskaya & Naseka 2004:186 [ref. 28183], McPhail 2007:462 [ref. 31199], Scharpf 2008:9 [ref. 30399], Page & Burr 2011:474 [ref. 31215], Page et al. 2013:122 [ref. 32708], LeMone et al. 2014:249 [ref. 33134], Goto et al. 2014:[10] [ref. 33456], Parin et al. 2014:242 [ref. 33547], Young et al. 2022:329 [ref. 39356], Page et al. 2023:183 [ref. 40505], Tellier et al. 2023:2 [ref. 40219]). Current status: Valid as Cottus cognatus Richardson 1836. Cottidae. Distribution: North America: Canada and U.S.A. (but eastern North Asia and Western North America and Arctic on ref. 33547). Habitat: freshwater, brackish.