Unio nyassanus hercules Preston, 1913 Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Mollusca class Bivalvia order Unionida family Unionidae genus Nyassunio species Nyassunio nyassaensis Name Homonyms Unio nyassanus hercules Preston, 1913 Unio nyassanus var. hercules Preston, 1913