nelsoni, Platypoecilus Meek [S. E.] 1904:147, Fig. 46 [Field Columbian Museum, Zoölogical Series v. 5; ref. 2958] Papayo, Río Balsas basin, Guerrero, Mexico. Holotype: USNM 51484. Paratypes: USNM 59996-97 (1, 2), 125676 [ex USBF 1609] (1). Type catalog: Parenti et al. 1999:14 [ref. 24072]. •Synonym of Poecilia butleri Jordan 1889 -- (Parenti et al. 1999:14 [ref. 24072]). •Synonym of Poecilia sphenops Valenciennes 1846 -- (Rosen & Bailey 1963:51 [ref. 7067], Lucinda in Reis et al. 2003:569 [ref. 27061]). •Valid as Poecilia nelsoni (Meek 1904) -- (Poeser 2003:164 [ref. 26783], Poeser 2011:420 [ref. 31550], Meyer 2015:242 [ref. 34698], Palacios et al. 2016:232 [ref. 34629] in subgenus Mollienesia, Romero-Berny et al. 2018:90 [ref. 35859], González-Murcia et al. 2019:296 [ref. 36544], Huber 2019:110 [ref. 36941]). Current status: Valid as Poecilia nelsoni (Meek 1904). Poeciliidae: Poeciliinae. Distribution: Central America: Mexico to El Salvador. Habitat: freshwater, brackish.