Eustomias brevibarbatus Parr, 1927

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 : 49-51

Eustomias brevibarbatus Parr, 1927

( Fig. 15C )

Diagnosis. Eustomias brevibarbatus differs from congeners by the presence of two long and free pectoral-fin rays; barbel length 13–33% SL; chin barbel usually with two terminal bulbs separated by a short interspace (0.1–1.5% SL); anterior portion of distal bulb with distinctive black pigment; short terminal filament (0.3–2.5% SL) bifurcated or trifurcated near its base; barbel stem lightly to moderately pigmented; deep ventral groove on belly absent; preorbital and suborbital organs absent (Gomon, Gibbs, 1985; McEachran, Fechhelm, 1998; Sutton et al., 2020).

Geographical distribution. Western Atlantic, between 35ºN and 25ºS, reported from off the United States to southeastern Brazil, including the Gulf of Mexico and the Caribbean Sea (Morrow, Gibbs, 1964; Bekker et al., 1975; Gomon, Gibbs, 1985; McEachran, Fechhelm, 1998; Harold, 2003). In Brazil the species was reported from off Fernando de Noronha Archipelago and Rio de Janeiro State, with additional records in the western South Atlantic outside the country’s EEZ (Gomon, Gibbs, 1985; Menezes et al., 2003; Costa, Mincarone, 2010; Judkins, Haedrich, 2018; Sutton et al., 2020). Eustomias brevibarbatus is reported here based on specimens collected off Rio Grande do Norte State (near the seamounts), the Rocas Atoll, and the Fernando de Noronha Archipelago between depths of 90 and 1,030 m ( Fig. 14B ).

Specimens examined. 6 (85–128 mm SL): NPM 4643, 1 (87 mm), AB2#49A; NPM 4644, 1 (85 mm), AB2#41A; NPM 4645, 1 (128 mm), AB2#50A; NPM 4646, 1 (95 mm), AB2#49B; NPM 4689, 1 (85 mm), AB2#59A; NPM 5013, 1 (102 mm), AB2#54B.

Figures

FIGURE 14 | Records of species of the Melanostomiinae (A–F) collected during the ABRACOS expeditions off northeastern Brazil. Oceanic islands: RA, Rocas Atoll; FN, Fernando de Noronha Archipelago.

FIGURE 15 | A. Eustomias bibulbosus, NPM 4642, 87 mm SL; B. Eustomias braueri, NPM 4816, 56 mm SL; C. Eustomias brevibarbatus, NPM 4646, 95 mm SL; D. Eustomias enbarbatus, NPM 4819, 60 mm SL; E. Eustomias minimus, NPM 4881, 69 mm SL; F. Eustomias schmidti, NPM 4882, 68 mm SL. Scale bars = 10 mm.