thermalis, Poecilia Steindachner [F.] 1863:181 [20], Pl. 4 (figs. 3-3a) [Sitzungsberichte der Mathematisch-Naturwissenschaftlichen Classe der Kaiserlichen Akademie der Wissenschaften v. 48 (1. Abth.); ref. 4208] La Esperanza sulphur spring, Chiapas, Mexico. Syntypes: (40) NMW 15153 (5), 59834 (4), 60645 (5), 76504-07 (7, 7, 7, 4). On p. 20 of separate. Poeser 2003:49 wrongly considers thermalis Günther 1866 as an original description with a type locality. •Synonym of Poecilia mexicana Steindachner 1863 -- (Poeser 2003:47 [ref. 26769], Poeser 2003:359 [ref. 27075], Meyer 2015:239 [ref. 34698]). •Synonym of Poecilia sphenops Valenciennes 1846 -- (Rosen & Bailey 1963:49 [ref. 7067], Lucinda in Reis et al. 2003:568 [ref. 27061]). •Valid as Poecilia thermalis Steindachner 1863 -- (Poeser 2003:166 [ref. 26783], Poeser 2011:420 [ref. 31550], Palacios et al. 2013:13 [ref. 32935], Palacios et al. 2016:232 [ref. 34629] in subgenus Mollienesia, Huber 2019:120 [ref. 36941]). Current status: Valid as Poecilia thermalis Steindachner 1863. Poeciliidae: Poeciliinae. Distribution: Chiapas, Atlantic slope of southern Mexico. Habitat: freshwater, brackish.