Pleurotaeniopsis ovalis (Ralfs ex Ralfs) De Toni, 1889 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Cosmarium species Cosmarium ovale Name Homonyms Pleurotaeniopsis ovalis (Ralfs ex Ralfs) De Toni, 1889