letonai, Priapichthys Hildebrand [S. F.] 1925:258, Figs. 12-13 [Bulletin of the Bureau of Fisheries v. 41 (no. 985); ref. 15590] Río San Miguel, San Miguel, El Salvador. Holotype: USNM 87251. Paratypes: FMNH 12055-60 (6), 12061-66 (5), 12067-72 (6), 120373-82 (10), 12083-92 (10), 12093 (6); UMMZ (3+8); USNM 87252-57 (18, 15, 28, 26, 32, 15), 87259-62 (30, 11, 22, 15), 339268 (1, allotype). Type catalog: Ibarra & Stewart 1987:69 [ref. 12367], Parenti et al. 1999:17 [ref. 24072]. •Synonym of Poeciliopsis gracilis (Heckel 1848) -- (Rosen & Bailey 1963:137 [ref. 7067], Parenti et al. 1999:17 [ref. 24072], Lucinda in Reis et al. 2003:570 [ref. 27061], Bussing 2008:834 [ref. 29806], Huber 2019:128 [ref. 36941]). Current status: Synonym of Poeciliopsis gracilis (Heckel 1848). Poeciliidae: Poeciliinae. Habitat: freshwater.