Pyrenula quercus Massal. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Eurotiomycetes order Pyrenulales family Pyrenulaceae genus Pyrenula species Pyrenula quercus Name Homonyms Pyrenula quercus Massal. Pyrenula quercus (A.Massal.) Trevis.