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Page number:326 
Remarks (internal):Varietal description centered upon WB 4796, received in 1962 from the IFO as Nakazawa's strain of A. aureus var. acidus N., S., and W. A culture, WB 4840, received in 1962 from the CBS as Ciferri's strain of this variety fails to fit the description and is believed to represent A. awamori Nakazawa.
The variety differs from the species in its more lightly sporulating colonies on Czapek's and malt agars, its larger conidial heads and structural parts, its relatively short and wider conidiophores, and especially its bright yellow mycelium on malt agar.
 
Description type:Non-original description 
Description:Aspergillus foetidus var. acidus, Naka., Simo, and Wat.
Synonym: Aspergillus aureus var. acidus Nakazawa, Simo, and Watanabe, in J. Agr. Chem. Soc. Japan 12: 960-961, Fig. 8 (1936).
Colonies on Czapek's solution agar growing rather slowly, 4.0 to 5.0 cm. in 10 to 14 days at room temperature (24-26°C), at first flocculent and near white to pale yellowish, lightly sporulating, later producing relatively few globose to radiate, brownish black conidial heads in marginal and sub-marginal areas; reverse in yellow shades turning dull yellow-brown in age; odor not pronounced; conidial heads comparatively large, 350 to 400 µm in diameter, not splitting into distinct columns; conidiophores relatively short and wide, commonly 600 to 800 µm by 20 to 30 µm, rarely 1 mm. in length, vesicles globose or nearly so, up to 80 to 85 µm in diameter, fertile over the entire surface; sterigmata biseriate, brownish in color, primaries 20 to 40 µm by 4.6 µm, secondaries 6 to 10 µm by 2.5 to 3.5 µm; conidia globose to somewhat flattened, brown, 4.0 to 4.5 µm in diameter, comparatively heavy walled, appearing smooth or with surface slightly irregular but not echinulate or rugulose.
Colonies on malt growing more rapidly and sporulating irregularly within 10 days, broadly zonate, plane or closely wrinkled, with vegetative mycelium largely submerged and bright golden yellow; conidial heads borne on short conidiophores as above but somewhat larger than on Czapek's, reaching diameters of 500 to 600 µm and showing numerous ill-defined columns of conidia.


 
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