Thomas Læssøe is a mycologist and researcher with the Globe Institute and the Department of Biology at the University of Copenhagen. He is the author (with Jens H. Petersen) of Fungi of Temperate Europe (Princeton). Jens H. Petersen is a mycologist, graphic designer, and photographer and the author of The Kingdom of Fungi (Princeton). Petersen and Læssøe created the online identification tool MycoKey (mycokey.com). Tobias Guldberg Frøslev is a mycologist and scientific officer at the Global Biodiversity Information Facility (GBIF) and an associate professor at the University of Copenhagen. Jacob Heilmann-Clausen is an associate professor at the Globe institute’s Center for Macroecology, Evolution, and Climate.