DERMOPHYTA— STERILE MYCELIA 



231 



B. Synnema composed of many hyphae 



1. Synnema clavate-capitate 



2. Synnema filiform-subulate 



Sclerographium 4:632 

 Negeriella 14:1114 



Staurosporae 



Synnema clavate-capitate; conidia of 4-5-radiate cells, 

 hyaline 



Riessia 4:627; 57 



89. DERMOPHYTA 



22:1334 



Mycelium branched, septate, usually producing two or three forms of conidia 

 in cultures; the so-called arthrospores are apparently nothing but hyphae with 

 short terminal segments that sometimes separate; aleurispores are simple conidia 

 acrogenous or pleurogenous on the hyphae or very short lateral branches; spindles 

 are a second type of conidia, usually hyaline and mostly elongate fusiform, continu- 

 ous or septate. 



These are probably hyphomycetous forms of Gymnascaceae, parasitic in the 

 skin and hair of man and other animals. Nannizzi (1926:85) has shown that, 

 under favorable cultural conditions, Microsporum gypseum (Bod.) Grigor. pro- 

 duces asci and spores typical of Gymnascaceae, to which most of the genera and 

 species of this group probably belong. Since the diagnoses are not based upon the 

 usual criteria, it is impossible to place the genera satisfactorily in any of the pre- 

 ceding families. 



A. Conidia of one kind only in culture, simple, 



globose to subglobose, rarely septate 



1. Conidia simple, globose to subglobose 



a. Conidia acrogenous 



b. Conidia pleurogenous 



c. Conidia in botryose clusters 



2. Conidia fusiform and septate 



B. Conidia of two kinds 



1. Aleurispores and x-septate spindles present 



2. Aleurispores and arthrospores present 



3. Aleurispores, arthospores and hyphae with 



dichotomous subglobose or clavate apical 

 branches 



Montoyella 



Pinoyella 



Malassezia 



Epidermophytum 22:1336 



Microsporum 22:1335 

 Trichophytum 22:1334 



Achorium 22:1336 



90. STERILE MYCELIA 



14:1138, 16:1108, 18:690, 22:1499 



Conidia permanently lacking so far as known; hyphae various, sometimes 

 parasitic on algae (sterile lichens). Somewhat similar forms, such as Aegerita and 

 lUosporium, have been traditionally included in Tuberculariaceae, 



A. Parasitic on algae 



B. Not parasitic on algae 



1. Tubercle-like or sclerotia 



a. Tubercles connected with fibrils 



b. Tubercles without fibrils 



(1) Cortex discrete 



(2) Cortex not discrete 



Lepraria, Pulveraria, etc. Z 239 



Rhizoctonia 14:1175 



Acinula 14:1174 

 Sderotium 14:1139 



