NEW SPECIES AND NEW RECORDS OF RARE CTENOSTOME BRYOZOANS OF THE GENUS ALCYONIDIUM IN THE RUSSIAN ARCTIC SEAS

New species of ctenostome bryozoan Alcyonidium pseudodisciforme sp. nov. is described. Subspecies Alcyonidium gelatinosum pachydermatum Denisenko, 1996 is raised to a species range and redescribed as A. pachidermatum Denisenko, 1996. New records of A. radicellatum Kluge, 1946 and A. proboscideum Kluge, 1962 are added to the list of bryozoan fauna of the Russian Arctic sector.