Paralarvae have not been described. The smallest described specimen is 16 mm ML. Even at this small size, the mantle covers the gladius at least in its anterior half. The eyes, unlike those of Onychoteuthis at this size, do not have luminous organs on the ventral surface of the eyeball. The conus has a spoon-shape rather than the cone-shape seen in Onychoteuthis. The row of large brownish-red chromatophores on the dorsal midline is probably characteristic. The specimen showed traces of an iridescent metallic sheen, greenish on the mantle and dark blue on the head. This description is from Naef (1921-23).
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