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IUCN threat status:

Not evaluated

Brief Summary

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Introduction

Most species of Grimpoteuthis are poorly known. They are somewhat less compressed in the anterior-posterior axis than are members of Opisthoteuthis and they generally have relatively larger fins. Species are closely associated with the deep-ocean floor and some species, at least, alternate between sitting on the ocean bottom and swimming above it while some others apear to be completely pelagic.

Diagnosis

Opisthoteuthids ...

  • without enlarged sucker fields on arms of males.
  • Areolae absent.
  • Optic lobe circular in cross-section.
  • One optic nerve bundle penetrates white body.
  • Shell U-shaped or slightly W-shaped.
  • Sucker aperature without tooth-like structures.

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