Brief Summary

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Introduction

Species of Planctoteuthis are usually rather small and very fragile deep-sea squids that are often badly damaged during capture. As a result, few species have been described. Unlike other chiroteuthids, the subadult retains the peculiar doratopsid paralarval tentacular club. Roper and Young (1967) suggest that Planktoteuthis is a neotenic doratopsis.

Diagnosis

A chiroteuthid ...

  • with antitragus but no tragus in oval funnel locking-apparatus.
  • with a compact club not divided into proximal and distal regions by structure of protective membranes.
  • without funnel valve.
  • without photophores.

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