Calicium nigrum var. minutum C.Knight Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Caliciales family Caliciaceae genus Calicium species Calicium abietinum Name Homonyms Calicium nigrum var. minutum C.Knight ex F.Wilson, 1889 Calicium nigrum var. minutum C.Knight