Abraliopsis falco Young 1972
Kotaro Tsuchiya
Introduction
A. falco is characterized by having stripes of integumental photophore on the mantle and unusual arm modification of the male.
Characteristics
- Tentacle clubs
- Two rows of different-sized hooks on manus.
- Carpal flap absent; aboral keel short, narrow.
- Arms
- Arms IV relatively long; ALI IV = 55-79.
- Arms I-III with 15 to 34 hooks and distal suckers.
- Female with 21-26 hooks on arm IV; male with 26-31 hooks on hectocotylized arm (right arm IV) and 40-45 hooks on modified left arm IV.
- Hectocotylus and male sexual dimorphism
- Hectocotylus with two subequal-sized offset flaps.
- Modified portion of hectocotylus without armature.
- Protective membrane and its spatulate trabeculae well developed on left arm IV, web-like; with minute conical papillae on trabeculae.
- Oral surface of arms I-III ornamented with small numerous conical papillae.
- Integumental Photophores
- Ventral mantle with six narrow longitudinal stripes of large integumental organs and and scattered intermediate small organs with a distinct wide mid-ventral photophore-less strip.
- Ventral head with three rows of narrow, longitudinal stripes and some intermediate scattered organs.
- Rows of organs along ventral side of arm III and dorsal side of arm IV is interrupted.
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Distribution
Geographical Distribution
This species is distributed in the tropical East Pacific from 30° N (Young, 1972) and southward to about 20° S (Okutani, 1974).
References
Okutani, T. 1974. Epipelagic decapod cephalopods collected by midwater tows during the EASTROPAC Expedition, 1967-1968 (systematic part). Bull. Tokai Reg. Fish. Res. Lab., 80:29-118.
Young, R.E. 1972. The systematics and areal distribution of pelagic cephalopods from the sea off southern California. Smiths. Contr. Zool., 97:1-159.
Title Illustrations
Left:Abraliopsis falco, from Okutani (1974), size, male.
Other illustrations
- Tentacle club, from Okutani (1974), size, male.
- Hectocotylus and modified left arm IV, from Okutani (1974), size, male.
Copyright |
© 1974 T. Okutani |
About This Page
Tokyo University of Fisheries, Konan, Minato, Tokyo
Page copyright © 2000
Citing this page:
Tsuchiya, Kotaro.
2000. Abraliopsis falco Young 1972. Version 01 January 2000 (under construction). http://tolweb.org/Abraliopsis_falco/19685/2000.01.01
in The Tree of Life Web Project, http://tolweb.org/
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