Ceratium hexacanthum f. spirale (Kof.) Bohm, 1931 Dataset GBIF Backbone Taxonomy Rank FORM Classification kingdom Chromista phylum Myzozoa class Dinophyceae order Gonyaulacales family Ceratiaceae genus Ceratium species Ceratium hexacanthum Name Homonyms Ceratium hexacanthum f. spirale (Kof.) Bohm, 1931 Ceratium hexacanthum subsp. spirale (Kofoid) Bohm, 1931