Ceratium tripos var. horridum Cleve Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Myzozoa class Dinophyceae order Gonyaulacales family Ceratiaceae genus Tripos species Tripos horridus Name Homonyms Ceratium tripos var. horridum Cleve Ceratium tripos subsp. horridum Cleve