Opegrapha atra var. parallela Leight. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Fungi phylum Ascomycota class Arthoniomycetes order Arthoniales family Arthoniaceae genus Arthonia species Arthonia atra Name Homonyms Opegrapha atra var. parallela Leight. ex Mudd Opegrapha atra var. parallela Leight. Opegrapha atra subsp. parallela (Leight. ex Mudd) Mudd Opegrapha atra f. parallela (Leight. ex Mudd) Arnold