A TAXONOMIC STUDY ON CELLULOLYTIC YEASTS AND YEAST-LIKE MICROORGANISMS ISOLATED IN JAPAN .1. ASCOMYCETOUS YEAST GENERA CANDIDA AND WILLIOPSIS, AND A YEAST-LIKE GENUS PROTOTHECA

Sixteen strains of cellulolytic yeasts and yeast-like microorganisms w ere isolated from natural materials collected in Japan by enrichment t echnique. Seven of them belonging to ascomycetous anamorphic yeasts, a n ascosporogenous yeast and an yeast-like genus Prototheca were classi fied into five species, Candida cellulolytica sp. nov. (1 strain), Can dida fukuyamanensis sp, nov.;(1 strain), Candida krusei (3 strains), W illiopsis saturnus var, saturnus (1 strain) and Prototheca zopfii (1 s train). Candida cellulolytica has Q-7 as the major ubiquinone and 41.6 mol% of G + C in DNA, and is assumed to have a glucan-mannan type cel l wall, and C. fukuyamanensis has Q-9 as the major ubiquinone and 47.8 mol% of G + C in DNA, and is assumed to have a glucan-mannan type cel l wall. Descriptions of two new Candida species are given.