Description

Type material. Holotype: presumably lost. Neotype: BMNH 1960.1.7.1 — Black Rock, Brighton, English Channel (epizootic on algae, collected close to the type locality) (Bergquist & Cook 2002). Comparative material examined. Sponge specimens used in the revision of Halisarca dujardini were collected using SCUBA, in White Sea (Kandalaksha Bay, Chupa Inlet (66 ° 17 ' 32 " N – 33 ° 39 ' 39 " E), 3 – 5 m depth, from algae Fucus ramosus and Laminaria saccharina, July 2000 – 2004; in Barents Sea, Kola Peninsula, Dalnije Zelentsi (69 ° 07 ' 19 " N – 36 ° 03 ' 21 " E) 0.3 – 0.5 m depth, July, August 2003; in Bering Sea, Avacha Bay (52 ° 46 ' 32 " N – 158 ° 36 ' 16 " E) 10 - 11 m depth, October 18 2008; in Japan Sea the Gulf of Peter the Great near of the Marine Biological station “ Vostok ” (Marine Biological Institute of Russian Academy of Sciences) (42 ° 54 ' N – 132 ° 38 ' W) from rocks and boulders at a depth 0.4 – 4 m; in North Sea, Norway, Bergen (60 ° 23 ' 29 " N – 5 ° 13 ' 46 " E), June 2009, 6 m depth; in North Sea, Netherlands, Zeeland, Goese Sas (51 ° 38 ' 52 " N – 3 ° 48 ' 0 " E) 18 m depth, July, 2009; NE Atlantic, North Wales (53 ° 14 ' 6 " N – 4 ° 7 ' 48 " W) July 1988, 3 m. We also investigated histologically a piece of the neotype and a piece of Halisarca franz-schulzei Merejkovsky, 1879 from Zoological Institute RAN, St-Petersburg, Russia.

Common Names

Taxonomic Hierarchy

Kingdom: Animalia

Phylum: Porifera

Class: Demospongiae

Order: Chondrillida

Family: Halisarcidae

Genus: Halisarca

Species: Halisarca dujardinii Johnston, 1842