Utterbackia imbecillis fusca F.C.Baker, 1927 Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Mollusca class Bivalvia order Unionida family Unionidae genus Utterbackia species Utterbackia imbecillis Name Homonyms Utterbackia imbecillis var. fusca F.C.Baker, 1927 Utterbackia imbecillis fusca F.C.Baker, 1927