lutzi, Heterandria Meek [S. E.] 1902:106, Pl. 20 lower [Field Columbian Museum, Zoölogical Series v. 3 (no. 6); ref. 2957] Río Quiotepec at Cuicatlán, Oaxaca, Mexico. Holotype: FMNH 3718. Paratypes: CAS 22767 [ex IU 10991] (13); FMNH 3710 (53), 3719 (104), 72567 (14), 3723 (200); UMMZ 162463 (9); USNM 126184 [ex USBF 1613] (now 3). Type catalog: Parenti et al. 1999:11 [ref. 24072]. •Synonym of Poeciliopsis gracilis (Heckel 1848) -- (Rosen & Bailey 1963:136 [ref. 7067], Parenti et al. 1999:11 [ref. 24072], Minckley & Marsh 2009:257 [ref. 31114], Meyer 2015:287 [ref. 34698]). •Valid as Poeciliopsis lutzi (Meek 1902) -- (Espinosa Pérez et al. 1993:52 [ref. 22290], Lucinda in Reis et al. 2003:570 [ref. 27061], Nelson et al. 2004:105 [ref. 27807], Lucinda & Reis 2005:43 [ref. 29205], Bussing 2008:834 [ref. 29806], Scharpf 2007:17 [ref. 30398], Page et al. 2013:110 [ref. 32708], Huber 2019:128 [ref. 36941]). Current status: Valid as Poeciliopsis lutzi (Meek 1902). Poeciliidae: Poeciliinae. Distribution: Atlantic slope of Oaxaca, Mexico. Habitat: freshwater.