The spores are round and there is no root like structure as there is for Rhizopus spp. The spores do not have distinguishing characteristics and are not identifiable on an Air-O-Cell cassette sample.
In culture the colony grows rapidly at 25 and for some pathogenic species at 37 degrees C. Growth is rapid on MEA and PDA and much slower on DG-18 due to the inhibition by dichloran. The colony growth on agar is a light brown in contrast to the white mycelium with dark pepper like spots of Rhizopus spp.
|Mucor spp. line drawings showing various stages of the sporangium - N. Carlson|