Opegrapha atra var. arthonioidea 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. arthonioidea Leight. Opegrapha atra f. arthonioidea (Leight. ex Mudd) Arnold Opegrapha atra var. arthonioidea Leight. ex Mudd