Arthonia trachylioides Nyl. ex Branth & Rostr. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Caliciales family Caliciaceae genus Calicium species Calicium trachylioides Name Homonyms Arthonia trachylioides Nyl. Arthonia trachylioides Nyl. ex Branth & Rostr.