GonatopsisTsunemi Kubodera, F. G. Hochberg, Richard E. Young, and Michael Vecchione
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- Hooks in medial two armature series on arms I-III.
- Tentacles absent beyond early juvenile stages.
- Radula with teeth in 5 or 7 series depending on species.
- Mantle tissue muscular or flabby depending on species.
- Fins rhomboid or sagittate in shape depending on species.
- Photophores absent.
Gonatopsis is divided into two subgenera on the basis of the radular structure. G. (Gonatopsis) with a five-tooth radula and G. (Boreoteuthis) with a seven-tooth radula.
|Species / Character||Habitat||Numerous sucker series at arm tips||Radular teeth||Arm length||Tail length|
|G. borealis ||North Pacific||No||7||40-50% ML||No tail|
|G. japonicus||Japanese waters||No||5||55% ML||long|
|G. makko||Northern-, western North Pacific||No||5||65% ML||very short|
|G. octopedatus||Western North Pacific ||Yes||5||80-85% ML||No tail|
|G. sp. A||Eastern North Pacific||Yes||?||?||?|
|G. okutanii ? *||Western North Pacific||No||5||ca. 100 % ML||?|
Tentacles are present in paralarvae but are lost at different early stages depending on the species (Nesis, 1973).
Young, R.E. 1972. The Systematics and Areal Distribution of Pelagic Cephalopods from the Seas off Southern California. Smithsonian Contributions to Zoology, 97:159 pages.
F. G. Hochberg
Santa Barbara Museum of Natural History, Santa Barbara, California, USA
Page copyright © 2013 , F. G. Hochberg, , and
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- First online 25 October 2004
- Content changed 08 January 2013
Citing this page:
Kubodera, Tsunemi, F. G. Hochberg, Richard E. Young, and Michael Vecchione. 2013. Gonatopsis http://tolweb.org/Gonatopsis/19764/2013.01.08 in The Tree of Life Web Project, http://tolweb.org/. Version 08 January 2013 (under construction).