Onychonema filiforme Ralfs, 1848 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Desmidiaceae genus Sphaerozosma species Sphaerozosma filiforme Name Homonyms Onychonema filiforme (Ehrenb. ex Ralfs) J.Roy & Bisset