THE ASPERGILLUS GLAUCUS GROUP 125 



Aspergillus montevidensis Talice and MacKinnon, in Soc. de Biol. (Paris) 



Compt. Rend. 108: 1007-1009. 1931. emend. Thorn and Raper, 



U. S. Dept. of Agr. Misc. Pub. 426, p. 20. 1941 . 



Colonies upon Czapek's solution agar (3 percent sucrose) restricted, 

 radiate sulcate, with zonation evident toward the margin, central area 

 showing coremia, perithecia few or lacking; reverse and agar very dark, 

 almost black. 



Colonies on Czapek's solution agar with 20 percent of sucrose, spreading, 

 wrinkled and buckled (fig. 32 D), at first bluish-green from massed conidial 

 heads, with central area later becoming yellow from developing perithecia 

 in a more or less tufted overgrowth of somewhat floccose mycelium ; reverse 

 in yellow-green shades to deep olive in colony center. 



Perithecia abundant, of variable size and irregular shape with relatively 

 few fertile asci and ascospores, late in developing, commonly 75 to 100m 

 in diameter, occasionally larger; asci 10 to 12/x in diameter; ascospores 

 lenticular, roughened, with broad and prominent furrow flanked by low 

 acute and irregular ridges, mostly 4.8 to 5.2m by 3.6 to 4.0m, occasional 

 spores larger or smaller. Conidial heads very abundant, small, somewhat 

 columnar, with few conidial chains, mostly 70 to 80m wide, occasionally 

 up to 100m; conidiophore up to 300 to 350m long, frequently very short 

 when borne upon the aerial mycelium, broadening to a hemispherical dome- 

 like vesicular area at the apex; commonly deep green or greenish-brown; 

 vesicle mostly 15 to 20m in diameter, occasionally larger or smaller; sterig- 

 mata in one series relatively short and thick, 6 to 7m by 3 to 3.5m; conidia 

 roughened, subglobose, commonly 4 to 5m by 3 to 4m, occasionally 5.5m 

 diameter. 



Type culture isolated by Talice and MacKinnon from the tympanic 

 membrane of the human ear (1931). It is carried in the XRRL collection 

 as No. 108. 



LARGE-SPORED SPECIES, OR THE HERBARIORUM SERIES 



Under Eurotium herbariorum Lk., Mangin includes all of the members 

 of the group with ascospores more than 6.6m in long axis (1909). In a 

 general way this represents a very common usage in older literature begin- 

 ning as far back as Corda in the 1830's. Because neither measurements 

 nor markings of the ascospores were given, no one can fix the type of E. 

 herbariorum. In general, the species in the large-spored group have both 

 conidia and ascospores definitely larger than those in series already de- 

 scribed. They become very conspicuous to the collector who finds the 

 anomalous situation of an overabundance of published names and a dearth 

 of isolations. Over a period of many years the scarcity of strains isolated 

 in this laboratory which show ascospores larger than 7.0m leads the authors 

 to believe that such forms are definitely rare if not abnormal. This obser- 



