bolivianus, Acestrorhamphus Fowler [H. W.] 1940:53, Figs. 7-8 [Proceedings of the Academy of Natural Sciences of Philadelphia v. 92; ref. 1436] Former farm ‘Monte Bello’, río Lipeo approximately 2 km upstream from confluence with río Bermejo, Lipeo hamlet, Los Toldos municipality, Santa Victoria department, Salta Province, Argentina. 22°26'50"S, 64°32'54"W. Holotype: ANSP 68814. Paratypes: ANSP 68815-31 (17), 79790 (7). Type catalog: Böhlke 1984:43 [ref. 13621]. Type locality changed from Bolivia to Argentina; see Mirande & Koerber 2015 [ref. 33698], Koerber 2022:107 [ref. 39426]. •Valid as Oligosarcus bolivianus (Fowler 1940) -- (Menezes & Géry 1983:589 [ref. 8307], Menezes 1987:26 [ref. 20060], Braga 1994:20 [ref. 27878], Menezes in Reis et al. 2003:151 [ref. 27061], López et al. 2003:28 [ref. 27366], Menni 2004:74 [ref. 28131], Ribeiro et al. 2007:52 [ref. 29321], Mirande 2010:497 [ref. 31006], Sarmiento et al. 2014:185 [ref. 35004], Almirón et al. 2015:589 [ref. 33673], Ribeiro & Menezes 2015:77 [ref. 33768], Mirande & Koerber 2015:25 [ref. 35117], Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:243 [ref. 40817]). Current status: Valid as Oligosarcus bolivianus (Fowler 1940). Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Lipeo River drainage, Paraguay River basin, Argentina and Bolivia. Habitat: freshwater.