Opegrapha vulgata var. siderella (Ach.) Nyl. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Fungi phylum Ascomycota class Arthoniomycetes order Arthoniales family Roccellaceae genus Opegrapha species Opegrapha niveoatra Name Homonyms Opegrapha vulgata var. siderella (Ach.) Nyl.