Heterodermia tremulans (Müll.Arg.) Culb. Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Caliciales family Physciaceae genus Heterodermia species Heterodermia speciosa Name Homonyms Heterodermia tremulans (Müll.Arg.) Culb.