This question is not about molds that affect coffee plants. I am asking about molds that grow in coffee that has been sitting for a few days or more. I did not find any scientific articles on point so I have begun to try to answer the question by observing; but I may have missed an article and someone else may know the answer already.
Roasting probably kills any mold in coffee beans and if molds grow in a cup of brewed coffee they come from the surrounding air. After leaving many partially-filled cups in various spaces and looking at molds that grew in them, Aspergillus, Penicillium, and Aureobasidium are the only molds I have seen under the microscope so far.
If someone has seen an authoritative article about this it would interest me. Thanks. (This is not a health issue, IMO. I'm just curious.)