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Abralia astrolineata Berry 1914

Kotaro Tsuchiya
Containing group: Abralia

Introduction

A. astrolineata is a large sized species for this genus attaining 100mm DML, and known only from a very limited area along the slope of the Kermadec Islands and coast of Queensland, eastern Australia (Nesis,1982/87). It is easily recognized by its distinct longitudinal photophore arrangement on the mantle and head.

Characteristics

  1. Tentacle clubs
    1. About four hooks on ventral side.
    2. Two rows of large suckers on dorsal side of manus.
     image info
  2. Hectocotylus
    1. Right ventral arm of male hectocotylized.
    2. Hectocotylus with two subequal sized off-set flaps.
     image info
  3. Eye Photophores
    1. Five large silvery organs of subequal size.
  4. Integumental Photophores
    1. Ventral mantle with distinctly arranged four longitudinal stripes of organs with broad spaces between stripes.
    2. Ventral head with three distinct, longitudinal stripes of organs.
  5. Terminal Arm Photophores
    1. Arm IV with four ovoidal large photophores at tip.
    2. Terminal suckers absent on oral side of organs in both sexes.
  6. Caudal Photophores
    1. At mantle apex, a pair of ovoidal photophores buried in tissue.

Comments

This species shares some peculiar features with A. astrosticta.
  1. Each arm IV has large ovoidal photophores buried in the tissue at the tip.
  2. A pair of photophores is buried in the tissue of mantle apex.

The former feature is superficially quite similar to photophores found in genus Abraliopsis. The latter character is unique to these two species among enoploteuthids.

Distribution

Vertical distribution

A. astrolineata seems to be a component of mesopelagic boundary community in the subtropical South Pacific.

Geographical distribution

This species was first described from the Kermadec Islands. Nesis (1982/87) also recorded this species from off Queensland, eastern Australia.

References

Berry, S.S.

Nesis, K.R., 1982/87.

Riddell, 1985. Enoploteuthidae from the New Zealand waters.

Title Illustrations

Abralia astrolineata, from the Kermadec waters, by Riddell (1985), size, female.

Other illustrations

Copyright © 1985 D.J. Riddell
About This Page



Tokyo University of Fisheries, Konan, Minato, Tokyo

Citing this page:

Tsuchiya, Kotaro. 2000. Abralia astrolineata Berry 1914. Version 01 January 2000 (under construction). http://tolweb.org/Abralia_astrolineata/19651/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/

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Abralia astrolineata

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