Pirostoma circinans (Fr.) Sacc. Dataset GBIF Backbone Taxonomy Rank SPECIES Published in (1870). Jb. Nassau. Ver. Naturk. 23-24: 401 (’1869-70′). Classification kingdom Fungi phylum Ascomycota genus Pirostoma species Pirostoma circinans Name Synonyms Coniosporium circinans Fr. Sphaeria circinans (Fr.) Rabenh. Homonyms Pirostoma circinans (Fr.) Sacc. Pirostoma circinans Fr.