Helisoma trivolvis marshalli F.C.Baker, 1945 Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Mollusca class Gastropoda family Planorbidae genus Planorbella species Planorbella trivolvis Name Homonyms Helisoma trivolvis var. marshalli F.C.Baker, 1945 Helisoma trivolvis marshalli F.C.Baker, 1945