First Record of Yoshizakia indopacifica S.-M.Lin, J.Huisman et C.Payri (Liagoraceae, Rhodophyta) from Japan

摘要

A benthic marine red alga, Yoshizakia indopacifica S.-M.Lin, J.Huisman et C.Payri (Liagoraceae, Nemaliales, Rhodophyta) was found from the late Dr. Makoto Yoshizaki (1943— 201 l)'s Japanese algal collection. Although the generic name was derived from him, this is the first record of this alga from Japan. This alga is similar to young stage of Liagora japonica Yamada in appearance, but Y. indopacifica is different from L. japonica and the liagoracean species with similar external morphology in having a combination of the following features: dioecious thalli, fine branches with regular diameter throughout (0.2-1.2 mm), dense ramification in their terminal, spermatangial formed in clusters at the distal ends of fertile assimilatory filaments, cells of carpo-gonial branches unfused after fertilization, involucral filaments not intermingled with gonimo-blasts, diffuse gonimoblast filaments.