There are millions of fungal species, and those few hundred found in the Aspergillus genus play important roles in areas ranging from industrial production to agricultural plant pathogens. Reported October 22, 2018, in Nature Genetics, a team led by scientists at the Technical University of Denmark, the U.S. Department of Energy (DOE) Joint Genome Institute (JGI), a DOE Office of Science User Facility, and the Joint Bioenergy Institute (JBEI), a DOE Bioenergy Research Center, present the first large analysis of an Aspergillus fungal subgroup, section Nigri.