Abstract
DNA renaturation experiments showed that Rhizopus arrhizus, R. oryzae, R. delemar, Amylomyces rouxii, R. delemar var. minimus, R. delemar var. multiplicisporus, R. arrhizus var. delemar, R. chungkuoensis var. isofermentarius and R. javanicus var. kawasakiensis can be accommodated in 3 taxa, namely, R. arrhizus var. arrhizus, R. arrhizus var. rouxii, and R. arrhizus var. delemar.