CirroctopusMichael Vecchione and Richard E. Young
- Cirroctopus antarctica (Kubodera & Okutani, 1986)
- Cirroctopus glacialis (Robson, 1930) (Robson, 1930)
- Cirroctopus hochbergi O'Shea, 1999
- Cirroctopus mawsoni (Berry, 1917)
- Arms and web
- Suckers not enlarged in males.
- Cirrus length comparable to largest sucker diameter.
- Web nodules absent.
- Fins long (greater than body width) and very broad.
- Mantle cavity
- Digestive tract
- Caecum nearly equal to or much larger than stomach.
- Intestine long (ca. 2.5 times esophagus length) with a variety of right-angle turns.
- Unilobular digestive gland.
image info The drawing on the left shows the digestive tract with the complex orientation of the intestine. The label "bend" indicates a sharp bend in the intestine toward the viewer that isn't otherwise clearly apparent.
- Nephridial sacs
- Nephridial sacs extensive.
- Nephridial sacs with glandular lining on walls of sacs in additional to renal appendages.
- Areolar spots present in young and near eyes and base of fins in adults.
- White body, optic lobe and optic-nerve tract
- White bodies meet in dorsal midline.
- Numerous optic nerve bundles penetrate white body.
- Optic lobe kidney-shaped in cross-section.
Shell V-shaped with long wings and short saddle.
image info The shell in the photographs on the left have been stained with methylene blue.
CommentsThe four species of the genus are poorly differentiated at present. Although a few potentially differentiating characters are known, identification must rely heavily on geographic location until the species are better known.
|Species of Cirroctopus are known only from Antarctic and Subantarctic waters.
Blue dots: C. hochbergi
O’Shea, Steve. 1999. The Marine Fauna of New Zealand: Octopoda (Mollusca: Cephalopoda). NIWA Biodiversity Memoir 112: 280pp.
Vecchione, M. and R. E. Young. 1997 Aspects of the functional morphology of cirrate octopods: locomotion and feeding. Vie Milieu 47(2):101-110.
Voss, G. L. and W. G. Pearcy. 1990. Deep-water octopods (Mollusca: Cephalopoda) of the Northeastern Pacific. Proc. Calif. Acad. Sci. 47: 47-94.
National Marine Fisheries Service
National Museum of Natural History
Washington, D. C. 20560
Richard E. Young
Dept of Oceanography
University of Hawaii
Honolulu, Hawaii 96822
Page copyright © 2003 and Richard E. Young
- First online 13 May 2003
Citing this page:
Vecchione, Michael and Young, Richard E. 2003. Cirroctopus. Version 13 May 2003 (under construction). http://tolweb.org/Cirroctopus/20103/2003.05.13 in The Tree of Life Web Project, http://tolweb.org/