costai, Nematocharax Bragança [P. H. N.], Barbosa [M. A.] & Mattos [J. L. O.] 2013:4, Figs. 1-3 [Vertebrate Zoology v. 63 (no. 1); ref. 32664] Cambiriba Stream, Balneário Guaíro, Contas River basin, 14°36'16"S, 40°06'08"W, Municipio de Iguaí, Estado da Bahia, Brazil, altitude 347 meters. Holotype: UFRJ 8216. Paratypes: UFRJ 8215 (3), 8265 (1 c&s). •Synonym of Nematocharax venustus Weitzman, Menezes & Britski 1986 -- (Menezes et al. 2015:453 [ref. 33689], Barreto et al. 2018:1159 [ref. 36378], Camelier 2024:239 [ref. 40817]). Current status: Synonym of Nematocharax venustus Weitzman, Menezes & Britski 1986. Characidae: Stethaprioninae. Habitat: freshwater.