Rissoa membranacea octona (Nilsson, 1822) Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Mollusca class Gastropoda order Littorinimorpha family Rissoidae genus Rissoa species Rissoa membranacea Name Homonyms Rissoa membranacea octona (Nilsson, 1822) Rissoa membranacea var. octona (Nilsson, 1822)