Argyropelecus sladeni Regan 1908

Lima, Adriano T., Costa, Paulo A. S., Braga, Adriana C., Nunan, Gustavo W. A. & Mincarone, Michael M., 2011, Fishes of the family Sternoptychidae (Stomiiformes) collected on the Brazilian continental slope between 11 ° and 23 ° S, Zootaxa 2742, pp. 34-48 : 40

Argyropelecus sladeni Regan 1908

( Fig. 2 E; Table 2 )

Material examined. 2 specimens (38.9–41.4 mm SL): MNRJ 30140, 1(41.4 mm), E-0506; MNRJ 30144, 1(38.9 mm); E-0512.

Diagnosis. Argyropelecus sladeni can be differentiated from its congeners by the following combination of characters: dorsal blade low, its height less than half the width of its base; post-abdominal spine small and subsymmetrical; scales below the SC photophores without spines; upper preopercular spine long, reaching a region posterior to bony edge of preopercle, usually dorsally directed (never ventrally); lower maxillary teeth small and uniform in size.

Meristic description. Fin rays: D 9; A 12; P1 11. Gill rakers: 18–19 (7+2+9–10). Photophores: BR 6; I 6; AB 12; SAB 6; PAN 4; AN 6; SC 4.

Distribution. Worldwide in tropical and subtropical waters.

Figures

FIGURE 2. Sternoptychids collected on Brazilian continental slope during the Thalassa and Astro Garoupa expeditions (asterisks indicate photo of fresh specimens): A. Argyripnus atlanticus; B. Maurolicus stehmanni *; C. Argyropelecus aculeatus *; D. Argyropelecus hemigymnus; E. Argyropelecus sladeni; F. Sternoptyx diaphana *; G. Sternoptyx pseudodiaphana; H. Sternoptyx pseudobscura; I. Polyipnus sp.