monacha, Poeciliopsis Miller [R. R.] 1960:3, Pl. 1 (figs. C-D) [Occasional Papers of the Museum of Zoology University of Michigan No. 619; ref. 10418] Arroyo San Benito, about 1.5 miles east-southeast of Rancho Guirocoba, Sonora, northwestern Mexico, 25°56'N, 108°40'W, elevation 1300 feet. Holotype: UMMZ 177268. Paratypes: (381) UMMZ 177269 (1, allotype), 178246 (orig. 379); USNM 196175 [ex UMMZ 178246] (11, now 10). Type catalog: Parenti et al. 1999:16 [ref. 24072]. •Valid as Poeciliopsis monacha Miller 1960 -- (Rosen & Bailey 1963:138 [ref. 7067], Espinosa Pérez et al. 1993:52 [ref. 22290], Parenti et al. 1999:16 [ref. 24072], Lucinda in Reis et al. 2003:570 [ref. 27061], Nelson et al. 2004:105 [ref. 27807], Lucinda & Reis 2005:43 [ref. 29205], Miller 2006:246 [ref. 28615], Scharpf 2007:21 [ref. 30398], Page et al. 2013:110 [ref. 32708], Meyer 2015:292 [ref. 34698], Huber 2019:128 [ref. 36941], Conway et al. 2019:115 [ref. 37045]). Current status: Valid as Poeciliopsis monacha Miller 1960. Poeciliidae: Poeciliinae. Distribution: Pacific slope of Mexico. Habitat: freshwater.