eiseni, Characodon Rutter [C. L.] 1896:266 [Proceedings of the California Academy of Sciences (Series 2) v. 6; ref. 36786] Branch of Río Grande de Santiago, Tepic, Mexico. Syntypes: CAS-SU 5008 [not 4999 as published] (4). Type catalog: Böhlke 1953:54 [ref. 12291]. •Valid as "Xenotoca" eiseni (Rutter 1896) -- (Miller 2006:288 [ref. 28615]). •Valid as Xenotoca eiseni (Rutter 1896) -- (Espinosa Pérez et al. 1993:43 [ref. 22290], Nelson et al. 2004:107 [ref. 27807], Scharpf 2007:29 [ref. 30398], Page et al. 2013:105 [ref. 32708], Domínguez-Domínguez et al. 2016:95 [ref. 34884], Lyons et al. 2019:144 [ref. 37104]). •Valid as Xenoophorus eiseni (Rutter 1896) -- (Huber 2019:35 [ref. 36941], Page et al. 2023:145 [ref. 40505]). Current status: Valid as Xenotoca eiseni (Rutter 1896). Goodeidae: Goodeinae. Distribution: Southern North America: upper Huicicila and lower Santiago River basins (Pacific slope of Mexico). Habitat: freshwater.