Ceratium gravidum var. praelongum Lemmerm. Dataset GBIF Backbone Taxonomy Rank VARIETY Classification kingdom Chromista phylum Myzozoa class Dinophyceae order Gonyaulacales family Ceratiaceae genus Tripos species Tripos praelongus Name Homonyms Ceratium gravidum var. praelongum Lemmerm. Ceratium gravidum subsp. praelongum Lemmermann