Pleurotaenium minutum f. crassum (West) Kossinskaya, 1960 Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Plantae phylum Charophyta class Conjugatophyceae order Desmidiales genus Haplotaenium species Haplotaenium minutum Name Homonyms Pleurotaenium minutum f. crassum (West) Kossinskaya, 1960 Pleurotaenium minutum var. crassum West & G.S.West Pleurotaenium minutum var. crassum (W.West) Willi Krieg.