A REVISION OF THE DEEP-WATER OCTOPUS GENUS SCAEURGUS (CEPHALOPODA: OCTOPODIDAE) WITH DESCRIPTION OF THREE NEW SPECIES FROM THE SOUTHWEST PACIFIC OCEAN
1Sciences, Museum Victoria, GPO Box 666E, Melbourne, Victoria 3001, Australia and Department of Zoology, University of Melbourne, Parkville, Victoria 3052, Australia; 2Department of Invertebrate Zoology, Santa Barbara Museum of Natural History, 2559 Puesta del Sol Road, Santa Barbara, California 931052936 USA; and 3Laboratoire de Biologie des Invertébrés Marins, URA 699 CNRS, Muséum National d'Histoire Naturelle, 55 Rue Buffon, 75005 Paris, France
Correspondence: M.D. Norman; e-mail: mnorman{at}unimelb.edu.au
Deep-water trawl surveys on seamounts around New Caledonia yielded 62 specimens of the little-known genus, Scaeurgus. Members of this genus of octopuses typically occur at depths of 200500 m in temperate and tropical latitudes worldwide. Prior to this study, Scaeurgus was considered to contain one to two species. The new material from New Caledonia contained a surprising diversity of Scaeurgus species from a small area: three distinct new species are described and limited material of a further two taxa is reported. A pygmy member of this genus is reported for the first time. Distributions of these new taxa are consistent with reports of high endemism on the seamount systems in this region. Fifty-eight of the 62 specimens were collected from seamounts, with four of the five taxa unique to a single seamount.
(Received 12 January 2004; accepted 28 January 2005)
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