CLASSIFICATION OF NON-ASCOSPORE-FORMING YEASTS AND 



YEAST-LIKE FUNGI 



(Adapted from Lodder) 



Order MONILIALES Class FUNGI IMPERFECTI 



Family I. CRYPTOCOCCACEAE. Yeast forms only or with pseudomycelium 

 and/or true mycelium. Not forming carotinoid pigments. 

 Subfamily A. CRYPTOCOCCOIDEAE. Without pseudomycehum, or with 

 onh' traces. No blastospores budding from mycelium. 

 I. Cells lemon-shaped, bipolar budding. 



Genus KLOECKERA 

 II. Cells triangular, budding from angles. 



Genus TRIGOXOPSIS 



III. Cells flask-shaped, single buds with a broad base. 



Genus PITYROSPORUM 



IV. Cells round, oval, or cylindrical. 



A. No pellicle in liquid media, or a soft moist pellicle after a long 

 time. Genus CRYPTOCOCCUS * 



B. PelUcle dry, wrinkled, in hquid media. 



L Cells cylindrical, buds not separated by fission from mother 



cell. Genus MYCODERMA 



2. Cells polymorphous, buds separated by fission from mother 

 ceU. Genus SCHIZOBLASTOSPORION 



Subfamily B. CANDIDOIDEAE. Yeast forms with pseudomycelium and/ 

 or true mycehum, forming blastospores, arthrospores or both. 

 I. Blastospores regularly produced, arthrospores not produced. 



Genus CANDIDA m 

 II. Both blastospores and arthrospores produced. 



Genus TRICHOSPORON 

 III. Arthrospores regularly, blastospores rarely, if ever, produced. 



Genus GEOTRICHUM -^ 

 Family II. NECTAROMYCETACEAE. Forming pseudomycelium, and conidia 

 on the aerial sm-face of the colonies. 



Genus NECTAROMYCES 

 Family III. RHODOTORULACEAE. No conidia. Yeast forms with or with- 

 out pseudomycelium. Carotinoid pigments formed, non-fermentive, 

 not germinating by repetition. 



Genus RHODOTORULA ^/ — 

 Family IV. SPOROBOLOMYCETACEAE. Yeast forms without true mycelium, 

 reproducing by budding and also germinating by repetition, as do 

 the basidiospores of many of the Tremallales of which these forms 

 may be regarded as imperfect species. Non-fermentive. 



A. Vegetative growth with rose, red, or salmon carotinoid pigments. 

 Spores more or less compressed laterally, kidney- or pear-shaped, 

 asymmetric. Genus SPOROBOLOMYCES 



1. No pseudomycehum. 



Subgenus SPOROBOLOMYCES, sensu stricto 



2. Pseudomycehum produced. 



Subgenus BLASTODERM A 



B. Vegetative growth white, cream, straw, or yellow with no trace of 

 red. Spores round, ovoid, or globular, symmetrical. 



Genus BULLERA 

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