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Abraliopsis tui Riddell 1985

Kotaro Tsuchiya
Containing group: Abraliopsis


A. tui is an endemic Abraliopsis species from New Zealand and Kermadec waters. This species is a typical Abraliopsis-type having scattered photophore arrangement on the ventral mantle and head, and carpal flaps and distinct aboral keels on clubs. It resembles A. hoylei, A. pfefferi and A. pacificus. This group contains several undescribed species.


  1. Tentacle clubs
    1. Two rows of Different-sized hooks on manus.
    2. Carpal flap and aboral keel distinct.
     image info
  2. Arms
    1. Arms IV distinctly long; ALI IV = 100-110.
    2. Arms with 17 - 23 hooks and ca.30 suckers (excl. arm IV).
  3. Hectocotylus
    1. Hectocotylus with single long narrow flap along ventral margin.
    2. Modified portion with armature.
     image info
  4. Integumental Photophores
    1. Ventral mantle and head with scattered arrangement of integumental organs.


This group, with a scattered integumental photophore pattern, has few taxonomic characters but each species occupies a different watermass. They are identified by some morphometric or meristic characters such as fin length index, arm length index, hook and sucker count, etc.


Geographical Distribution

This species is only known from New Zealand and Kermadec waters (Riddell, 1985).


Riddell, D.J. 1985. The Enoploteuthidae (Cephalopoda: Oegopsida) of the New Zealand region. Fisheries Reserch Bulletin (NZ), 27:1-52.

About This Page

Tokyo University of Fisheries, Konan, Minato, Tokyo

Citing this page:

Tsuchiya, Kotaro. 2000. Abraliopsis tui Riddell 1985. Version 01 January 2000 (under construction). http://tolweb.org/Abraliopsis_tui/19692/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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Abraliopsis tui

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