Cyclothone pseudopallida

Author: Mukhacheva, 1964

Cyclothone pseudopallida Mukhacheva, 1964

Status in World Register of Marine Species:
Accepted name: Cyclothone pseudopallida Mukhacheva, 1964 (updated 2009-06-25)

Diagnosis: body fairly elongate; mouth large; premaxillary teeth even; vomer with teeth. Pseudobranch absent. Meristic data (eastern North Atlantic only): gillrakers on first arch 18-20, 4 on hypobranchial; no raker in articulation of epi- and ceratobranchial; gill filaments fused basally in broad segment shape along hypobranchial; branchiostegal rays 13 (14), 6 on epihyal. Dorsal finrays 13-14; pectoral finrays 9-10; pelvic finrays 6; anal finrays 19-20; last dorsal and anal finrays not split to base, dorsal adipose fin absent; anus close to pelvic fin bases. Pyloric caeca 4. Vertebrae 32 (31-33). Scales present. Photophores: SO absent, ORB 1, OP 2, BR 10, IV 3 + 10; VAV 5, two anterior to genital opening; AC 14, 1(2) between last anal and first procurrent rays; OA 8; opercular gland inconspicuous; pre-caudal glands weakly developed, confined to procurrent rays. Colour: whitish ground colour, epaxial brownish, diffuse pigmentation; brown pigment conspicuous between anal pterygiophores; membrane between posteriormost branchiostegal rays with scattering of punctate melanophores; meningeal pigment comprised dorsoanteriorly of many punctate melanophores. Size: male to 43 mm, female to 58 mm SL.

Habitat: oceanic, mesopelagic, precise depth range dependent upon developmental stage, latitude, season; juveniles and adults in 300 900 m depth; no diel vertical migrations. Food: no data. Reproduction: dioeclous.

Distribution: circumglobal; tropical in North Atlantic but sampled in Clofnam area in small numbers to about 61° N; absent in Mediterranean.

Eggs, larvae and young stages. Grey, 1964: 185.
Otoliths (sagitta). No data.