Thylaeodus contortus (P.P.Carpenter, 1857) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Gastropoda order Littorinimorpha family Vermetidae genus Thylaeodus species Thylaeodus contortus Name Synonyms Bivonia contorta P.P.Carpenter, 1857 Petaloconchus contortus (Carpenter, 1856) Vermetus contortus (P.P.Carpenter, 1857) Homonyms Thylaeodus contortus (P.P.Carpenter, 1857)