Journal of the Marine Biological Association of the UK



Research Article

Re-evaluation of Graneledone setebos (Cephalopoda: Octopodidae) and allocation to the genus Megaleledone


A.L.  Allcock a1c1, F.G.  Hochberg a2 and T.N.  Stranks a3
a1 Marine Systems Research Group, School of Biology and Biochemistry, Queen's University Belfast, 97 Lisburn Road, Belfast, BT9 7BL, UK
a2 Department of Invertebrate Zoology, Santa Barbara Museum of Natural History, 2559 Puesta del Sol Road, Santa Barbara, California 93105, USA
a3 Division of Programs, Research & Collections, Museum Victoria, GPO Box 666E, Melbourne, Victoria 3001, Australia

Abstract

The holotype of the Antarctic octopodid Graneledone setebos was re-examined and found to lack the epidermal warts characteristic of the genus Graneledone. It is similar in its large size to another Southern Ocean species, Megaleledone senoi. A comparative study of G. setebos and specimens attributed to M. senoi led us to conclude that M. senoi is a junior synonym of G. setebos. Although M. senoi is not valid, the genus Megaleledone can be separated from other genera by the structure of the radula (which lacks marginal plates) and we therefore consider the genus to be valid. We propose the new combination of Megaleledone setebos and have refigured the beaks and radula of the holotype herein and expanded the description. A search of museum specimens and the literature shows that Megaleledone setebos is more common in Antarctic waters than previously supposed.

(Received October 14 2002)
(Accepted February 3 2003)


Correspondence:
c1 e-mail: l.allcock@qub.ac.uk