castaneus, Ichthyomyzon Girard [C. F.] 1858:381 [General report upon zoology of the several Pacific railroad routes, 1857; ref. 4911] Galena, Illinois [not Galena, Minnesota], U.S.A. Holotype (unique): USNM 979. Type catalog: Vasil'eva et al. 2001:57-58 [ref. 25714]. •Valid as Ichthyomyzon castaneus Girard 1858 -- (Lee et al. 1980:16 [ref. 22416], Robison & Buchanan 1988:71 [ref. 23393], Tomelleri & Eberle 1990:7 [ref. 24089], McAllister 1990:25 [ref. 14674], Page & Burr 1991:16 [ref. 18983], Boschung 1992:18 [ref. 23239], Etnier & Starnes 1993:91 [ref. 22809], Knight & Hastings 1994:149 [ref. 25560] as Icthyomyzon, Cross & Collins 1995:19 [ref. 23394], Mettee et al. 1996:65 [ref. 25836], Scott & Crossman 1998:46 [ref. 24570], Yamazaki & Goto 2000:8 [ref. 24514], Renaud & de Ville 2000:333 [ref. 24887], Ross et al. 2001:64 [ref. 25978], Nelson et al. 2004:48 [ref. 27807], Bailey et al. 2004:56 [ref. 27882], Miller & Robison 2004:45 [ref. 27931]. Boschung & Mayden 2004:89 [ref. 27995], Scharpf 2005:4 [ref. 28940], Lang et al. 2009:48 [ref. 31599], Page & Burr 2011:123 [ref. 31215], Robison et al. 2011:458 [ref. 31590], Renaud 2011:47 [ref. 31770], Page et al. 2013:48 [ref. 32708], Bagley et al. 2023:311 [ref. 41241], McAllister et al. 2023:62 [ref. 41452], Page et al. 2023:36 [ref. 40505]). Current status: Valid as Ichthyomyzon castaneus Girard 1858. Petromyzontidae. Distribution: Northern and eastern North America: Canada and U.S.A. Habitat: freshwater.