? rivularis Hass. Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Plantae phylum Charophyta class Zygnematophyceae order Zygnematales family Zygnemataceae genus Spirogyra species Spirogyra rivularis Name Homonyms ? rivularis Turcz. ? rivularis Hass. ? rivularis Flk.