Peridinium geminum subsp. excavatum Playfair Dataset GBIF Backbone Taxonomy Rank SUBSPECIES Classification kingdom Chromista phylum Myzozoa class Dinophyceae order Peridiniales family Peridiniaceae genus Parvodinium species Parvodinium umbonatum Name Homonyms Peridinium geminum var. excavatum Playfair, 1919 Peridinium geminum subsp. excavatum Playfair