Marine cephalopod mollusc with mantle moderately stout and elongate, slender in mature males, which have a ridge along ventral midline. Fins rhombic, attaining 70% of mantle length in adults, their posterior margin slightly concave. Tentacular clubs expanded, lanceolate. Arm sucker rings with 8 to 11 distinct, squared, truncate teeth in distal, smooth or with rudimentary denticles proximally; slightly more than 1/2 of left arm IV hectocotylized by enlargement of about 50 pairs of sucker stalks into swollen papillae, each with a minute rudimentary sucker on the tip; papillae slightly larger in ventral row; a fusiform photophore on each side of rectum. Maximum mantle length 40 cm.
- Area 51: the Western part of the Indian Ocean
- Area 57: the Eastern part of the Indian Ocean
- Area 61: the Northwestern part of the Pacific Ocean
- Area 71: the Western Central part of the Pacific Ocean
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