marshi, Gambusia Minckley [W. L.] & Craddock [J. E.] in Minckley 1962:393, Figs. 4, 5a-b, 6a-b [Copeia 1962 (no. 2); ref. 6259] Río Salado de los Nadadores, near junction with Río Salado de Monclova, 1 mile south of Hermanas, Coahuila, Mexico. Holotype: UMMZ 179167. Paratypes: UMMZ 179168 (63). Plus additional material. •Valid as Gambusia marshi Minckley & Craddock 1962 -- (Rosen & Bailey 1963:105 [ref. 7067], Meffe 1985:898 [ref. 22489], Rauchenberger 1989:3 [ref. 15687], Espinosa Pérez et al. 1993:46 [ref. 22290], Lucinda in Reis et al. 2003:559 [ref. 27061], Nelson et al. 2004:103 [ref. 27807], Lucinda & Reis 2005:41 [ref. 29205], Miller 2006:224 [ref. 28615], Scharpf 2007:18 [ref. 30398], Page et al. 2013:109 [ref. 32708], Meyer 2015:84 [ref. 34698], Huber 2019:67 [ref. 36941], Page et al. 2023:146 [ref. 40505]). Current status: Valid as Gambusia marshi Minckley & Craddock 1962. Poeciliidae: Poeciliinae. Distribution: Southern North America: Coahuila, Atlantic slope (Mexico). Habitat: freshwater, brackish.