Unio retortus von Martens, 1875 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Mollusca class Bivalvia order Unionida family Unionidae genus Tchangsinaia species Tchangsinaia piscicula Name Homonyms Unio retortus von Martens, 1875 Unio retortus Heude, 1883