Natural History Section, Royal British Columbia Museum, 675 Belleville Street, Victoria, British Columbia, V8W9W2, Canada
Department of Biology, University of Victoria, PO Box 3020, Stn CSC, Victoria, British Columbia, V8W 3N5, Canada
Six new species of Hexactinellida are described from hard bottom communities of shelf, canyon and seamounts of the west coast of North America: Washington, British Columbia and Gulf of Alaska. They were collected by a variety of methods, trawl, manned submersible, and robot submersible, and hence vary greatly in condition. The six species comprise additions to five different families of the subclass Hexasterophora, Farreidae (Farrea omniclavata sp. nov. and F. truncata sp. nov.), Euretidae (Chonelasma oreia sp. nov.), Euplectellidae (Amphidiscella lecus sp. nov.), Leucopsacidae (Oopsacas olympicus sp. nov.) and Rossellidae (Acanthascus malacus sp. nov.). These additions represent an increase of 29% to the known species of Hexactinellida in this area. A completely unique form of defended tabulate stalk is described for A. lecus. The species Chauoplectella spinifera is transferred to Oopsacas.
(Received October 08 2012)
(Accepted January 13 2013)
(Online publication March 26 2013)
Correspondence should be addressed to: H.M. Reiswig, Natural History Section, Royal British Columbia Museum, 675 Belleville Street, Victoria, British Columbia, V8W9W2, Canada email: firstname.lastname@example.org