Cosmarium subtumidum f. minor Willi Krieg., 1932 Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium subtumidum Name Homonyms Cosmarium subtumidum var. minor J.Sampaio, 1922 Cosmarium subtumidum f. minor Willi Krieg., 1932