Collema quadratum J.Lahm Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Fungi phylum Ascomycota class Lecanoromycetes order Peltigerales family Collemataceae genus Rostania species Rostania occultata Name Homonyms Collema quadratum J.Lahm ex Körb. Collema quadratum J.Lahm Collema quadratum J.Lahm ex Zwackh