Ichthyococcus polli Blache, 1964

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 : 25

Ichthyococcus polli Blache, 1964

( Fig. 6A )

Diagnosis. Ichthyococcus polli differs from congeners by the presence of the abdominal adipose fin; interorbital space 7.5–10.0% HL; body depth 26.9–31.9% SL; 20–27 gill-rakers; SO present; IV photophores in a straight line, only 8th IV elevated; AC in a straight line; OA 28–29; VAV 11–13; IC 50–53 (Mukhacheva, 1980; Fujii, 1983a; Schaefer et al., 1986b).

Geographical distribution. Atlantic Ocean, between 44ºN and 20ºS (Krefft, 1983; Quéro et al., 1990c; Sutton et al., 2020). In the western Atlantic, previously recorded off United States, Suriname, French Guiana, and Brazil (off Saint Peter and Saint Paul Archipelago) (Blache, 1963; Mukhacheva, 1980; Fujii, 1983a; Krefft, 1983; Schaefer et al., 1986b). Ichthyococcus polli is reported here based on specimens collected off Paraíba State, Rio Grande do Norte State (near the seamounts), the Rocas Atoll, and the Fernando de Noronha Archipelago, between depths of 110 and 1,113 m ( Fig. 7A ).

Specimens examined. 14 (41–72 mm SL): NPM 3258, 1 (41 mm), AB1#14; NPM 4148, 1 (69 mm), AB2#59A; NPM 4149, 1 (51 mm), AB2#21; NPM 4150, 7 (44–59 mm), AB2#52B; NPM 4151, 1 (72 mm), AB2#58A; NPM 4339, 1 (50 mm), AB2#42A; NPM 4410, 1 (53 mm), AB2#40A; NPM 4926, 1 (53 mm), AB2#52A.

Figures

FIGURE 6 | A. Ichthyococcus polli, NPM 4119, 51 mm SL; B. Phosichthys argenteus, NPM 4560, 64 mm SL; C. Pollichthys mauli, NPM 3290, 38 mm SL; D. Vinciguerria nimbaria, NPM 3305, 27 mm SL. Scale bars = 10 mm.

FIGURE 7 | Records of species of Phosichthyidae (A), Astronesthinae (B, C), Chauliodontinae (D), Stomiinae (E), and Malacosteinae (F) collected during the ABRACOS expeditions off northeastern Brazil. Oceanic islands: RA, Rocas Atoll; FN, Fernando de Noronha Archipelago.