balsas, Poeciliopsis Hubbs [C. L.] 1926:66 [Miscellaneous Publications, Museum of Zoology, University of Michigan No. 16; ref. 2233] Río Balsas, Guerrero, Mexico. Holotype: FMNH 3702. Paratypes: FMNH 3697 (29), 4540 (1), 4546 (10), 4553 (27), 4563 (7), 14074-96 (now 17); UMMZ 164097 [ex FMNH] (6). Type catalog: Ibarra & Stewart 1987:68 [ref. 12367]. •Valid as Poeciliopsis balsas Hubbs 1926 -- (Rosen & Bailey 1963:138 [ref. 7067], Espinosa Pérez et al. 1993:51 [ref. 22290], Lucinda in Reis et al. 2003:570 [ref. 27061], Nelson et al. 2004:104 [ref. 27807], Lucinda & Reis 2005:43 [ref. 29205], Miller 2006:241 [ref. 28615], Scharpf 2007:20 [ref. 30398], Page et al. 2013:110 [ref. 32708], Huber 2019:125 [ref. 36941], Page et al. 2023:147 [ref. 40505], Fricke et al. 2024:459 [ref. 41622]). Current status: Valid as Poeciliopsis balsas Hubbs 1926. Poeciliidae: Poeciliinae. Distribution: Southern North America: Río Balsas system, Pacific slope (Mexico) endemic. Habitat: freshwater.