Ceratium declinatum (Karsten) Jörgensen Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Protozoa phylum Dinophyta class Dinophyceae order Peridiniales family Ceratiaceae genus Ceratium species Ceratium declinatum Name Homonyms Ceratium declinatum (Karsten) Jörg. Ceratium declinatum G.Karsten, 1907