clemenciae, Xiphophorus Álvarez [J.] 1959:69 [Ciencia (Mexico City) v. 19 (nos 4-5); ref. 11974] Cascada Stream, tributary of Río Sarabia, close to junction with Río Coatzacoalcos, 24 kilometers east of Palomares, Oaxaca, Mexico. Holotype: ENCB-IPN P403a. Paratypes: (29) AMNH 28598 (2). •Valid as Xiphophorus clemenciae Álvarez 1959 -- (Rosen 1979:357 [ref. 22796], Espinosa Pérez et al. 1993:54 [ref. 22290], Rodriguez 1997:674 [ref. 23266], Meyer & Schartl 2002:59 [ref. 26066], Lucinda in Reis et al. 2003:573 [ref. 27061], Meyer & Schartl 2003:62 [ref. 27477], Kallman et al. 2004:15 [ref. 27790], Nelson et al. 2004:105 [ref. 27807], Lucinda & Reis 2005:44 [ref. 29205], Miller 2006:255 [ref. 28615], Scharpf 2007:17 [ref. 30398], Page et al. 2013:111 [ref. 32708], Meyer 2015:374 [ref. 34698], Gómez-González et al. 2014:975 [ref. 37383], Huber 2019:143 [ref. 36941], López-Segovia et al. 2020:111 [ref. 38151]). Current status: Valid as Xiphophorus clemenciae Álvarez 1959. Poeciliidae: Poeciliinae. Distribution: Southern North America: Upper Coatzacoalcos and Grijalva River basins (Atlantic slope of Mexico). Habitat: freshwater.