Thysanactis dentex Regan & Trewavas, 1930

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 : 59-60

Thysanactis dentex Regan & Trewavas, 1930

( Fig. 18B )

Diagnosis. Same as for the genus.

Geographical distribution. Atlantic, eastern Indian, and western and central Pacific oceans (Morrow, Gibbs, 1964; Clarke, 1974; Gibbs, Barnett, 1990; Hutchins, 2001; Aizawa, 2002; Harold, 2003; Fricke et al., 2011; Sutton et al., 2020). In the western Atlantic , the species is reported between 18ºN and 7ºS, from the Caribbean Sea to Brazil, where it was recorded off the northeastern region (Eduardo et al., 2018a; Judkins, Haedrich, 2018). Thysanactis dentex is reported here based on specimens collected from off Rio Grande do Norte State (including the seamounts), the Rocas Atoll , and the Fernando de Noronha Archipelago , at depths between 90 and 1,113 m ( Fig. 14F ) .

Specimens examined. 40 (43–150 mm SL): NPM 3281, 1 (52 mm), AB1#12; NPM 3282, 1 (50 mm), AB1#14; NPM 3421, 1 (damaged), AB1#22; NPM 4626, 2 (68–92 mm), AB2#41A; NPM 4627, 8 (67–131 mm), AB2#44A; NPM 4632, 3 (137–145 mm), AB2#52A; NPM 4633, 1 (135 mm), AB2#39; NPM 4635, 1 (94 mm), AB2#59B; NPM 4636, 1 (81 mm), AB2#54B; NPM 4637, 3 (132–145 mm), AB2#28; NPM 4638, 2 (113–145 mm), AB2#59A; NPM 4639, 2 (46–138 mm), AB2#52B; NPM 4640, 1 (51 mm), AB2#44B; NPM 4641, 1 (90 mm), AB2#42A; NPM 4649, 9 (43–55 mm), AB2#49B; NPM 4694, 2 (115–150 mm), AB2#50A.

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 18 | A. Photonectes achirus, NPM 4629, 79 mm SL; B. Thysanactis dentex, NPM 4639, 138 mm SL. Scale bars = 10 mm.