varii, Oligosarcus Menezes [N. A.] & Ribeiro [A. C.] 2015:541, Figs. 1-4 [Neotropical Ichthyology v. 13 (no. 3); ref. 33973] Rio Grande do Sul, São Marcos, rio Jacuí basin, rio São Marcos near to hydroeletric plant PCH rio São Marcos, Brazil, 29°02’13"S, 51°05’39"W. Holotype: MCP 31148. Paratypes: MCP, MZUSP. •Valid as Oligosarcus varii Menezes & Ribeiro 2015 -- (Bertaco et al. 2016:414 [ref. 34561] as vari, Wendt et al. 2019:5 [ref. 36952], Menezes & Camelier 2024:245 [ref. 40817]). Current status: Valid as Oligosarcus varii Menezes & Ribeiro 2015. Acestrorhamphidae: Acestrorhamphinae. Distribution: South America: Rio Jacuí basin, Laguna dos Patos system, Brazil. Habitat: freshwater.