Cosmarium tutum Shyndanovina, 2020 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium tutum Name Synonyms Cosmarium perforatum var. skujae Grönblad, 1945 Homonyms Cosmarium tutum Shyndanovina, 2020