? simpsoni Ferriss, 1900 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Mollusca class Bivalvia order Unionida family Unionidae genus Potamilus species Potamilus fragilis Name Homonyms ? simpsoni Reynolds, 1936 ? simpsoni Cook & Camilleri, 1997 ? simpsoni White, 1941 ? simpsoni Stirton, 1939 ? simpsoni Gazin, 1956 ? simpsoni Jepsen, 1930 ? simpsoni Thomas, 1910