Psorotichia caesia (Nyl.) Forssell, 1885 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Lichinomycetes order Lichinales family Lichinaceae genus Psorotichia species Psorotichia schaereri Name Homonyms Psorotichia caesia (Nyl.) Forssell, 1885