australis, Hypomasticus Ito [I. S. B.], Souza-Shibatta [L.], Oyakawa [O. T.], Garavello [J. C.], Britski [H. A.] & Birindelli [J. L. O.] 2025:32, Figs. 17-27, 29C-D [Neotropical Ichthyology v. 23 (no. 3): e250003; ref. 42551] Rio Ribeira de Iguape, near the confluence with rio Juquiá, municipality of Registro, São Paulo State, Brazil, 24°24'13.5"S, 47°49'29.7"W. Holotype: MZUSP 125891. Paratypes: LBP, LISDEBE, MZUEL, MZUSP. Plus additional non-type material. •Valid as Hypomasticus australis Ito, Souza-Shibatta, Oyakawa, Garavello, Britski & Birindelli 2025. Current status: Valid as Hypomasticus australis Ito, Souza-Shibatta, Oyakawa, Garavello, Britski & Birindelli 2025. Anostomidae: Leporininae. Distribution: South America: Ribeira de Iguape, Una do Prelado and Rio de Janeiro coastal river basins, including the Lagoa Feia system, from Rio de Janeiro State to eastern São Paulo and northeastern Paraná States, Brazil. Habitat: freshwater.