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Little is known obout the biology of any species of Asperoteuthis. The most peculiar feature of this genus is the structure of the tentacular clubs. The distal half of the club has typical suckers and suggests that this part of the club functions in the usual capture of prey. The function of the bare proximal half of the club with its broad protective membranes is less clear but relates to another problem: How can the long and extremely slender tentacles, which in A. acanthoderma can be 7-12 times the mantle length (Tsuchiya and Okutani, 1993), be deployed? Perhaps the wide protective membranes of the proximal region of the club, which are composed virtually entirely of muscular trabeculae, function as muscular fins that swim the club into position.


A chiroteuthid ...

  • with suckers only on distal portion of tentacle-club.
  • with atypical tragus and antitragus in funnel locking-apparatus which define a slender Y-shape or a slender curved groove.
  • without photophores on arms IV.


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