Ceratium hexacanthum var. contortum Lemmerm., 1899 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Myzozoa class Dinophyceae order Gonyaulacales family Ceratiaceae genus Ceratium species Ceratium hexacanthum Name Homonyms Ceratium hexacanthum var. contortum Lemmerm., 1899 Ceratium hexacanthum f. contortum (Lemmerm.) Böhm, 1931