Retusa umbilicata nitidula (Montagu, 1803) Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Mollusca class Gastropoda order Cephalaspidea family Retusidae genus Retusa species Retusa nitidula Name Homonyms Retusa umbilicata nitidula (Montagu, 1803) Retusa umbilicata var. nitidula (Montagu, 1803)