oligolepis, Xiphoramphus Steindachner [F.] 1867:339 [33] [Sitzungsberichte der Kaiserlichen Akademie der Wissenschaften. Mathematisch-Naturwissenschaftliche Classe v. 56 (1. Abth.); ref. 14188] Río de la Plata, Argentina. Holotype (unique): NMW. On p. 33 of separate. •Valid as Oligosarcus oligolepis (Steindachner 1867) -- (Menezes 1987:28 [ref. 20060], Braga 1994:16 [ref. 27878], Sverlij et al. 1998:13 [ref. 27632], López et al. 2003:29 [ref. 27366], Menezes in Reis et al. 2003:152 [ref. 27061], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Litz & Koerber 2014:15 [ref. 33622], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:78 [ref. 33768], Bertaco et al. 2016:414 [ref. 34561], Koerber et al. 2017:38 [ref. 35267], Wendt et al. 2019:5 [ref. 36952], Koerber & Serra 2020:1 [ref. 37449], Loureiro et al. 2023:70 [ref. 40506], Menezes & Camelier 2024:244 [ref. 40817]). Current status: Valid as Oligosarcus oligolepis (Steindachner 1867). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Paraguay, lower Paraná, Uruguay and La Plata River basins (Argentina, Brazil, Paraguay and Uruguay). Habitat: freshwater.