ataktos, Hemigrammus Marinho [M. M. F.], Dagosta [F. C. P.] & Birindelli [J. L. O.] 2014:258, Figs. 1-2 [Neotropical Ichthyology v. 12 (no. 2); ref. 33372] Tocantins State, Natividade, córrego Cocal on road TO-280, rio Manoel Alves drainage, rio Tocantins basin, 11°42’50.2"S, 47°35’40.2"W, Brazil. Holotype: MZUSP 113725. Paratypes: DZSJRP, MZUEL, MZUSP, ZUEC. Plus non-type material at CAS. Type catalog: Andrade et al. 2017:439 [ref. 35588]. Appeared as Hyphessobrycon on p. 258, correction in Dagosta et al. 2016:257 [ref. 34377]. •Valid as Hemigrammus ataktos Marinho, Dagosta & Birindelli 2014 -- (Dagosta et al. 2016:258 [ref. 34377], Petrolli et al. 2016:168 [ref. 34395], Pastana & Ohara 2016:396 [ref. 34716], Reia & Benine 2019:413 [ref. 36527]). Current status: Valid as Hemigrammus ataktos Marinho, Dagosta & Birindelli 2014. Acestrorhamphidae: Pristellinae. Distribution: South America: middle Tocantins River basin, Brazil. Habitat: freshwater.