cortezi, Xiphophorus montezumae Rosen [D. E.] 1960:96, Figs. 10, 11, 13, 30 [Bulletin of the Florida State Museum, Biological Sciences v. 5 (no. 4); ref. 11945] Arroyo Matlapa at Comoca, north of Axtla, San Luis Potosí, Mexico. Holotype: UMMZ 177302. Paratypes: UMMZ 177303 (1, allotype). Other material: UMMZ 108602 (21), 108678 (1), 108679 (3), 124174 (4), 124331 (312), 124341 (46), 124353 (55), 124364 (9), 124374 (128), 194958 (53), 196923 (67), 196930 (37). •Synonym of Xiphophorus montezumae Jordan & Snyder 1899, but a valid subspecies as described -- (Rosen & Bailey 1963:65 [ref. 7067]). •Valid as Xiphophorus cortezi Rosen 1960 -- (Rosen 1979:357 [ref. 22796], Espinosa Pérez et al. 1993:54 [ref. 22290], Rodriguez 1997:674 [ref. 23266], Morris et al. 2001:69 [ref. 25123], Meyer & Schartl 2002:59 [ref. 26066], Meyer & Schartl 2003:63 [ref. 27477], Nelson et al. 2004:105 [ref. 27807], Lucinda & Reis 2005:44 [ref. 29205], Miller 2006:256 [ref. 28615], Scharpf 2007:22 [ref. 30398], Page et al. 2013:111 [ref. 32708], Meyer 2015:376 [ref. 34698], Huber 2019:144 [ref. 36941], Page et al. 2023:148 [ref. 40505]). Current status: Valid as Xiphophorus cortezi Rosen 1960. Poeciliidae: Poeciliinae. Distribution: Southern North America: Panuco River basin, Atlantic slope (Mexico). Habitat: freshwater.