Peridinium carolinianum subsp. elongatum Skuja Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Chromista phylum Myzozoa class Dinophyceae order Gonyaulacales family Ceratiaceae genus Ceratium species Ceratium cornutum Name Homonyms Peridinium carolinianum var. elongatum Skuja, 1964 Peridinium carolinianum subsp. elongatum Skuja