Phylum:Anamorphic fungi >> Class: Anamorphic fungi >>  Order: Anamorphic fungi 
 BCRC Number 32311      
 Scientific Name: Aspergillus ustus

Aspergillus ustus (Bain.) Thom. & Church, The Aspergilli: 152. 1926.

 Description: Colony diameters on Czapek’s Agar 4.0-4.5 cm in 10 days at 25°C, floccose; mycelium white to grey brown; exudate uncolored to yellow, or yellow brown; soluble pigment yellow; reverse pale lemon yellow to dull sulphine yellow (R., Plate IV); conidial heads radiate to loosely columnar, drab to hair brown or olive brown (R., Plate XLVI, XL); stipes 24-390 × 2.0-7.2 μm, smooth, pale brown to brown; vesicles globose, subglobose, to pyriform, 3.6-14.3 μm wide. Aspergilla biseriate; metulae covering 1/2 to 3/4 of the vesicle, 4.0-8.0 × 2.3-4.8 μm, phialides 3.6-7.1 × 2.4-4.4 μm. Conidia globose, 2.5-4.4 μm, rough to very rough. Colony diameters on Malt Extract Agar 5.0-5.5 cm in 10 days at 25°C, plane, margin more or less floccose; mycelium white; conidial heads near light hellebore green, Kronberg’s green or andover green (R., Plate XVII, XXXI, XLVII); reverse colorless to yellow, orange to dull olive.

Taiwan, Miaoli Pref., from stored paddy rice, 18 Dec 1986; stored corn seeds, Chiayi Pref., 4 Apr 1989 (CCRC 32311); soil, Taichung City, 24 Nov 1989.

 Habitat: from stored paddy rice; stored corn seeds; soil.

Taiwan, Netherlands, USA.


Tzean, SS et al. 1990.


S. S. Tzean and J. L. Chen

 Note: On Czapek’s Agar mycelium white to grey; conidial heads drab to hair brown or olive brown; stipes brown, smooth; vesicles small; aspergilla biseriate; conidia very rough.