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Abraliopsis lineata (Goodrich 1896)

Kotaro Tsuchiya

Containing group: Abraliopsis

Introduction

A. lineata is a relatively small-sized species, which attains 30 mm DML. It is widely distributed in the Indo-West Pacific.

Characteristics

Tentacle clubs
1. Two rows of subequal-sized hooks on manus.
2. Carpal flap and aboral keel absent.
Arms
1. Arms IV are moderate in length; ALI IV = 50-65.
2. Arms I-III with 14 - 25 hooks and distal suckers.
3. Female with 10-12 hooks on arm IV.
Hectocotylus and male sexual dimorphism
1. Hectocotylus with two subequal-sized offset flaps.
2. Modified portion without armature.
3. Arms I with well developed, spatulated trabeculae in protective membranes and numerous minute tubercles on oral surfaces.
4. Arm II swollen, about twice thickness of other arms.
Integumental Photophores
1. Ventral mantle with six narrow longitudinal stripes of large integumental organs and scattered small organs between stripes; a distinct, narrow, mid-ventral photophore-less strip present.
2. Ventral head with three rows of narrow, longitudinal stripes and some scattered organs in between.
3. Stripes of organs along ventral side of arm III and dorsal side of arm IV are interrupted.

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Distribution

Vertical Distribution

A. lineata was found during the day at depths as shallow as 100m above an oxygen-poor layer in Arabian Sea (Tsuchiya et al., 1991).

Geographical Distribution

This species is distributed in widely in the tropical Indo-West Pacific from the Mascarenes (Chun, 1910; Nesis, 1982/87, eastward to Ryukyu Island, Japan, Indonesia and Polynesia (Nesis, 1982/87; Tsuchiya, pers.obs.). In the southwestern Pacifi, it reaches farther to the south than 15° S.

References

Tsuchiya, K., Piatkowski, U., and Okutani, T. 1991. Distribution and re-description of Abraliopsis lineata Goodrich, 1896 (Cephalopoda: Enoloteuthidae) from the Arabian Sea. J. nat. Hist., 25:1121-1133.

Title Illustrations

Abraliopsis lineata, Arabian Sea, from Tsuchiya (2000), size, male.

Other illustrations

Tentacle club, Arabian Sea, from Tsuchiya et al. (1991), size, sex.
Hectocotylus, Arabian Sea, from Tsuchiya et al. (1991), size, male.
Modified arm I, Arabian Sea, from Tsuchiya et al. (1991), size, male.
Modifeid arm II, Arabian Sea, from Tsuchiya et al. (1991), size, male.

Copyright	© 2000 K. Tsuchiya

About This Page

Tokyo University of Fisheries, Konan, Minato, Tokyo

Citing this page:

Tsuchiya, Kotaro. 2000. Abraliopsis lineata (Goodrich 1896). Version 01 January 2000 (under construction). http://tolweb.org/Abraliopsis_lineata/19689/2000.01.01 in The Tree of Life Web Project, http://tolweb.org/