Flexicalymene retrorsa minuens (Foerste, 1919) Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Animalia phylum Arthropoda class Trilobita order Phacopida family Calymenidae genus Calymene species Calymene retrorsa Name Homonyms Flexicalymene retrorsa minuens (Foerste, 1919)