aspergillus acidus aspergillus acidus aspergillus acidus is a species of fungus in the genus aspergillus. aspergillus acidus can be used in food fermentation for tea. aspergillus acidus scientific classification kingdom: fungi division: ascomycota class: eurotiomycetes order: eurotiales family: trichocomaceae genus: aspergillus species: a. acidus binomial name aspergillus aciduskozakiewicz, z. 1989 synonyms aspergillus foetidus var. pallidus aspergillus foetidus var. acidus