Ceratium pentagonum var. turgidum Jorgensen, 1911 Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Myzozoa class Dinophyceae order Gonyaulacales family Ceratiaceae genus Ceratium species Ceratium pentagonum Name Homonyms Ceratium pentagonum f. turgidum (Jorgensen) Bohm, 1931 Ceratium pentagonum var. turgidum Jorgensen, 1911