heckelii, Xiphophorus Weyenbergh [H.] 1874:292, Pls. 1-2 (= figs. 1-31) [Verslagen en Mededeelingen der Koninklijke Akademie van Wetenschappen. Afdeeling Natuurkunde (Ser. 2) v. 8; ref. 17835] La Plata [? probably Río Primero, Cordoba], Argentina. Syntypes: MSNG 33704 (4). Type catalog: Tortonese 1963:314 [ref. 10351]. Species is described in more detail in Weyenbergh 1877:17, Pl. 4 [ref. 14248]. •Species inquirenda in Poeciliidae -- (Lucinda in Reis et al. 2003:575 [ref. 27061]). •Synonym of Jenynsia multidentata (Jenyns 1842) -- (Koerber & Azpelicueta 2009:52 [ref. 30112], Litz & Koerber 2014:32 [ref. 33622], Mirande & Koerber 2015:53 [ref. 35117]). •Synonym of Jenynsia lineata (Jenyns 1842) -- (Amorim 2018:[11] [ref. 35838], Huber 2019:13 [ref. 36941]). Current status: Synonym of Jenynsia lineata (Jenyns 1842). Anablepidae: Anablepinae. Habitat: freshwater.