Species that contain: Xiphophorus and couchianus [ 3 ] records

couchiana, Limia Girard [C. F.] 1859:116 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 11; ref. 27410] Río San Juan at Cadereita and Monterey, Nuevo León, Mexico. Possible syntypes USNM 3507 (2, from Cadereita) not located. Poecilia couchii in an unjustified emendation. •Valid as Xiphophorus couchianus (Girard 1859) -- (Rosen & Bailey 1963:63 [ref. 7067], Rosen 1979:353 [ref. 22796], Espinosa Pérez et al. 1993:55 [ref. 22290], Rodriguez 1997:674 [ref. 23266] as cochianus, Meyer & Schartl 2002:59 [ref. 26066], Lucinda in Reis et al. 2003:573 [ref. 27061], Kallman et al. 2004:9 [ref. 27790], Nelson et al. 2004:105 [ref. 27807], Lucinda & Reis 2005:44 [ref. 29205], Miller 2006:257 [ref. 28615], Scharpf 2007:23 [ref. 30398], Page et al. 2013:111 [ref. 32708], Meyer 2015:378 [ref. 34698], Huber 2019:144 [ref. 36941]). Current status: Valid as Xiphophorus couchianus (Girard 1859). Poeciliidae: Poeciliinae. Distribution: San Juan River basin, Nuevo Léon, Atlantic slope of Mexico. Habitat: freshwater.

couchii, Poecilia Günther [A.] 1866:347 [Catalogue of the fishes in the British Museum v. 6; ref. 1983] •Unjustified emendation of Limia couchiana Girard 1859. •Synonym of Xiphophorus couchianus (Girard 1859) -- (Lucinda in Reis et al. 2003:573 [ref. 27061], Huber 2019:144 [ref. 36941]). Current status: Synonym of Xiphophorus couchianus (Girard 1859). Poeciliidae: Poeciliinae. Habitat: freshwater.

gordoni, Xiphophorus Miller [R. R.] & Minckley [W. L.] 1963:538, Figs. 1, 3-5 [Copeia 1963 (no. 3); ref. 5040] Laguna Santa Tecla, about 10 miles south-southeast of El Candido, Cuarto Ciénegas, Coahuila, Mexico. Holotype: UMMZ 179866. Paratypes: UMMZ 179867 (1, allotype), 179868 (193). •Synonym of Xiphophorus couchianus (Girard 1859), but a valid subspecies -- (Rosen & Bailey 1963:63 [ref. 7067]). •Valid as Xiphophorus gordoni Miller & Minckley 1963 -- (Rosen 1979:353 [ref. 22796], Espinosa Pérez et al. 1993:55 [ref. 22290], Rodriguez 1997:674 [ref. 23266], Meyer & Schartl 2002:59 [ref. 26066], Lucinda in Reis et al. 2003:573 [ref. 27061], Nelson et al. 2004:105 [ref. 27807], Lucinda & Reis 2005:44 [ref. 29205], Miller 2006:258 [ref. 28615], Scharpf 2007:23 [ref. 30398], Page et al. 2013:111 [ref. 32708], Meyer 2015:381 [ref. 34698], Huber 2019:146 [ref. 36941]). Current status: Valid as Xiphophorus gordoni Miller & Minckley 1963. Poeciliidae: Poeciliinae. Distribution: Cuatro Ciénegas valley, Coahuila, Atlantic slope of Mexico. Habitat: freshwater.