NEW SPECIES OF PTILOTA (CERAMIACEAE, RHODOPHYTA) FROM KUNASHIR ISLAND (THE KURILE ISLANDS)

摘要

A new species Ptilota polydentata (Ceramiales, Rhodophyta) found in sublittoral of Kunasbir Island on Bossiella corp ressa KIoczc. is described. Genus Priloia C Ag,. is widely dispersed In the Northern Hemisphere. It includes four species: P. gunneriSilva, Maggs et Irvine, P. serrata Kutz., P. filicina J. Ag. and P. phacelocarpvides A. Zin. The first two species are distributed in the Arctic and Atlantic Oceans, the latter two are in the Pacific Ocean, P.filicina is common in the boreal zone on coasts of N. America and Asia. It was described from Vancouver Island (Canada) P. phacelocarpoides has a geographical range occurring at coasts of Sea of Japan, Honshu, Hokkaido. Monneron Sakhalin and Kunashir Islands. It was described from Ussuri Bay (Sea of Japan). Ptilota species are distinguished from each other by the morphology of determinate branches (leaflets) and determinate branchlets (Masuda, Sasaki, 1990; Maggs, Hommersand, 1993).