Polycystis Dataset GBIF Backbone Taxonomy Rank GENUS Classification kingdom Bacteria phylum Cyanobacteria class Cyanobacteriia order Synechococcales family Merismopediaceae genus Polycystis Name Homonyms Polycystis Kölliker, 1845 Polycystis Polycystis (Kützing) Kützing, 1849 Polycystis Lév.