Cylichna cylindracea attonsa (Carpenter, 1864) Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Mollusca class Gastropoda order Cephalaspidea family Cylichnidae genus Cylichna species Cylichna attonsa Name Homonyms Cylichna cylindracea attonsa (Carpenter, 1864) Cylichna cylindracea var. attonsa P.P.Carpenter, 1865