Cylichna cylindracea var. attonsa P.P.Carpenter, 1865 Dataset GBIF Backbone Taxonomy Rank VARIETY 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