brachynema, Chasmocranus Gomes [A. L.] & Schubart [O.] 1958:413, Figs. 1-3 [Revista Brasileira de Biologia v. 18 (no. 4); ref. 12066] Rio Mogi Guaçu, Cachoeira de Emas, Piraçununga, São Paulo, Brazil. Holotype (unique): EEBP 617 (not found in 2023). Type catalog: Ferraris 2007:182 [ref. 29155], Azevedo-Santos et al. 2023:549 [ref. 40344]. The specific name is treated as a noun. •Valid as Chasmocranus brachynema Gomes & Schubart 1958 -- (Bockmann & Guazzelli in Reis et al. 2003:411 [ref. 27061], Ferraris 2007:182 [ref. 29155] as brachynemus, Deprá & Slobodian 2024:3 [ref. 40879] as 'Chasmcranus' brachynema). Current status: Valid as Chasmocranus brachynema Gomes & Schubart 1958. Heptapteridae: Heptapterinae. Distribution: South America: Mogi Guaçu River drainage, upper Paraná River basin, São Paulo State (Brazil). Habitat: freshwater.