Eustomias Vaillant, 1884

Villarins, Bárbara T., Dario, Fabio Di, Eduardo, Leandro N., Lucena-Frédou, Flávia, Bertrand, Arnaud, Prokofiev, Artem M. & Mincarone, Michael M., 2022, Deep-sea dragonfishes (Teleostei: Stomiiformes) collected from off northeastern Brazil, with a review of the species reported from the Brazilian Exclusive Economic Zone, Neotropical Ichthyology (e 220004) 20 (2), pp. 1-78 : 47

Eustomias Vaillant, 1884

Diagnosis. Eustomias can be distinguished in the Melanostomiinae by the trunk slender, mouth large, snout tapering and longer than eye, upper jaw protrusible; three pairs of basibranchial teeth; no teeth on vomer or palatine; anal-fin origin well in advance of the dorsal-fin origin; anal-fin base distinctly longer than the dorsal-fin base; 0–13 pectoral-fin rays, lacking free rays; notochord forming a U-shaped or S-shaped bend behind head, with anterior 6 or 7 vertebrae incomplete; chin barbel with great anatomical variation (Morrow, Gibbs, 1964; Gibbs, 1986c; Kenaley, Stewart, 2015h; Sutton et al., 2020). A total of 128 valid species in 11 subgenera (Fricke et al., 2022).