Unio mingrelicus stevenianiformis Zhadin, 1938 Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Mollusca class Bivalvia order Unionida family Unionidae genus Unio species Unio crassus Name Homonyms Unio mingrelicus stevenianiformis Zhadin, 1938 Unio mingrelicus var. stevenianiformis Zhadin, 1938