THE ASPERGILLUS GLAUCUS GROUP 127 



Aspergillus mangini (Mangin) n. comb. 



Synonyms : Eurotium herbariorum ser. minor Mangin, Ann. des Sci. 

 Nat., Bot. (ser. 9) 10: 365. 1909. 

 Aspergillus minor (Mangin) Thorn and Raper, U. S. D. A. 

 Misc. Publ. No. 426, p. 27. 1941. 



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

 attaining a diameter of only 1 to 2 cm. in 3 weeks, irregular and wrinkled, 

 cream colored to bluish-brown, conidial heads present or lacking, small 

 perithecia present or lacking, mostly abortive; reverse uncolored to orange- 

 maroon. 



Colonies upon Czapek's solution agar with 20 percent of sucrose plane 

 or somewhat wrinkled in the central area, spreading evenly, attaining a 

 diameter of 8 to 10 cm. in 3 weeks (fig. 33 A), predominantly brick-red in 

 color becoming maroon in age, perithecia abundant and borne in a close 

 felt of red-encrusted hyphae at the agar surface, conidial heads few in 

 number, projecting above the perithecial layer, generally distributed over 

 the entire colony, but occasionally concentrated in localized areas; reverse 

 in shades of deep red-brown. 



Perithecia abundant, largely embedded in and obscured by a close 

 mycelial felt at the agar surface, yellow to orange, globose to subglobose, 

 mostly 100 to 120m in diameter, occasionally up to 150m; asci 14 to 16m; 

 ascospores lenticular, commonly 6.6 to 7.4m by 5.2 to 5.8m occasionally up 

 to 7.8m in long axis, finely roughened in the equatorial area, ridges low and 

 rounded or pyramidal in section, furrow generally definite, shallow but 

 often steep-sided, V-shaped. 



Conidial heads few, generally scattered, projecting above the perithecial 

 layer, pale blue-green in color, radiate, mostly 150 to 200m in diameter, but 

 frequently larger; conidiophores smooth, pale to dark brown, mostly 700 

 to 800m in length, occasionally reaching 1 mm. broadening to 15 to 18m 

 below the vesicular apex; vesicles subglobose, 30 to 40m; sterigmata in a 

 single series, 8 to 10m by 4 to 5m; conidia dull green, elliptical to sub- 

 globose mostly 6.0 to 7.5m and frequently 8.0m in long axis. 



Represented by culture NRRL No. 117 isolated from an unpainted 

 board, as type ; and by several additional cultures isolated in this laboratory. 

 Culture NRRL No. 115, received in 1937 from Oscar W. Richards, of the 

 Spencer Lens Company, differs from the type by producing ascospores of 

 somewhat smaller size and with less evident furrow and ridges. Thus, it 

 may represent a strain transitional between Aspergillus mangini and A. 

 ruber. However, it is not sufficiently different from A. mangini, either 

 culturally or morphologically, to warrant its description as a separate 

 species or as a distinct variety. 



Mangin (1909), in his study of the group, found specimens in his collec- 



