Opegrapha chevallieri var. agglomerata Sandst. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Fungi phylum Ascomycota class Arthoniomycetes order Arthoniales family Arthoniaceae genus Arthonia species Arthonia calcarea Name Homonyms Opegrapha chevallieri var. agglomerata Sandst. Opegrapha chevallieri f. agglomerata Sandst.