Diplotomma calcareum (Ach.) Körb. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Rhizocarpales family Rhizocarpaceae genus Rhizocarpon species Rhizocarpon umbilicatum Name Homonyms Diplotomma calcareum (Ach.) Flot. Diplotomma calcareum (Ach.) Körb.