nematurus, Chalcinus Kner [R.] 1858:163 [3] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 32 (no. 22); ref. 18871] Rio Cuiabá [Cujaba], Brazil. Lectotype: NMW 69034. Paralectotypes: NMW 16171 (1, dry), 62689 (2), 62694 (2), 69034 (1). Appeared in more detail in Kner 1860:13 [p. 5 in separate], Pl. 1 (fig. 1) [ref. 7130]. Lectotype selected by Malabarba 2004:182 [ref. 28150]. •Valid as Triportheus nematurus (Kner 1858) -- (Malabarba 1998:76 [ref. 23840], Britski et al. 1999:29 [ref. 24147], Malabarba & Lima in Reis et al. 2003:158 [ref. 27061], Malabarba 2004:182 [ref. 28150], Mirande 2010:485 [ref. 31006], Koerber 2011:2 [ref. 31122], Koerber 2014:3 [ref. 33621], Litz & Koerber 2014:10 [ref. 33622], Sarmiento et al. 2014:54, 185 [ref. 35004], Mirande & Koerber 2015:17 [ref. 35117], Mariguela et al. 2016:132 [ref. 34141], Koerber et al. 2017:27 [ref. 35267], Reis et al. 2020:463 [ref. 38364], Brandão et al. 2022:147 [ref. 40464], Loureiro et al. 2023:50 [ref. 40506], Malabarba 2024:436 [ref. 40817]). Current status: Valid as Triportheus nematurus (Kner 1858). Triportheidae: Triportheinae. Distribution: South America: lower Paraná River and Paraguay River basins (Argentina, Brazil, Bolivia, Paraguay and Uruguay). Habitat: freshwater.