acutirostris, Oligosarcus Menezes [N. A.] 1990:15, Fig. 3 [Boletim de Zoologia, Universidad de São Paulo v. II [for 1987]; ref. 20060] Rio Itapemirim, Fazenda Boa Esperança, between Pacotuba and Coutinho, Espirito Santo, about 21°S, 41°W, Brazil. Holotype: MZUSP 37525. Paratypes: MZUSP 1686 and 4772-4782 (12), 1795 and 4783 (2), 2798 and 4796-4800 and 37563-37567 (11); USNM 289217-18 (5, 3); plus more paratypes at MZUSP. Type catalog: Oyakawa 1996:485 [ref. 23140]. •Valid as Oligosarcus acutirostris Menezes 1990 -- (Menezes in Reis et al. 2003:151 [ref. 27061], Ribeiro et al. 2007:52 [ref. 29321], Menezes & Ribeiro 2010:653 [ref. 30976], Ribeiro & Menezes 2015:76 [ref. 33768], Petry et al. 2016:302 [ref. 34966], Wendt et al. 2019:5 [ref. 36952], Silva et al. 2020:6 [ref. 37809], Menezes & Camelier 2024:242 [ref. 40817] dated 1987, Vieira-Guimarães et al. 2024:39 [ref. 41258]). Current status: Valid as Oligosarcus acutirostris Menezes 1990. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: eastern coastal rivers, between Espírito Santo and Bahia States (Brazil). Habitat: freshwater.