*Aspergillus terreus* is a fungus found in soil, decomposing vegetation and dust in warmer climates such as tropical and subtropical regions. *A. terreus* is commonly used in industry to produce important organic acids, such as itaconic acid and cis-aconitic acid, and enzymes like xylanase. It was also the initial source for the drug mevinolin (lovastatin), a drug for lowering serum cholesterol. *A. terreus* can cause opportunistic infections in people with deficient immune systems. It also produces aspterric acid and 6-hydroxymellein, inhibitors of pollen development in *Arabidopsis thaliana.*