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Two new species of sponges (Porifera, Demospongiae) from the Aleutian Islands, Alaska

Published online by Cambridge University Press:  13 August 2014

Helmut Lehnert*
Affiliation:
Eichenstrasse 14, 86507 Oberottmarshausen, Germany GeoBio-Center LMU München, Richard Wagner Straße 10, 80333 München, Germany
Robert P. Stone
Affiliation:
Auke Bay Laboratories, Alaska Fisheries Science Center, National Marine Fisheries Service, NOAA 17109 Point Lena Loop Road, Juneau, Alaska 99801, USA
*
Correspondence should be addressed to:H. Lehnert, Eichenstrasse 14, 86507 Oberottmarshausen, Germany. email: Lehnert@spongetaxonomics.de

Abstract

Two new demosponges, Megaciella pituitosa and Cladocroce toxifera, are described from the Aleutian Islands, fostering our contention that the region is a hotspot of poriferan biodiversity. Seven of the thirteen species of Megaciella now known worldwide occur in the Sea of Okhotsk or around the Aleutian Islands. Similarly, five of the sixteen species of Cladocroce known worldwide occur in Alaska. Megaciella pituitosa sp. nov. possesses two categories of choanosomal styles and spicules of different sizes that differentiate it from all known congeners. Cladocroce toxifera sp. nov. differs from all known congeners by possessing toxa and an ectosomal tangential arrangement of oxeas.

Type
Research Article
Copyright
Copyright © Marine Biological Association of the United Kingdom 2014 

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