Dictyostelids in Japan. XIV. Dictyostelium rosarium Raper & Cavender and Polysphondylium filamentosum Traub, Hohl & Cavender

摘要

Two species of dictyostelids, Dictyostelium rosarium and Polysphondylium filamentosum, were recovered in Japan. D. rosarium, characterized by sessile lateral sori and globose spores, is reported after an absence of 35 years and is redescribed here in detail. P. filamentosum, characterized by the rebranching of whorled branches and the filamentous elongation of sorophores, is described from indigenous Japanese material for the first time.