Depending on who you believe, there are between 1.5 million and 5 million species of fungi on earth. Only 100,000 of them have been named and characterized according to the (arcane, ancient) rules in the International Code of Botanical Nomenclature. Of those, barely a fifth have gene sequences in GenBank, the world’s main storehouse of genomic data. Only a couple hundred have been sequenced completely, and most of those are yeast—because those are commercially useful.
