Arthrodesmus incus var. extensus O.F.Andersson, 1890 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Staurodesmus species Staurodesmus extensus Name Homonyms Arthrodesmus incus var. extensus O.F.Andersson, 1890