Coscinodiscus tumidus Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Coscinodiscales family Coscinodiscaceae genus Coscinodiscus species Coscinodiscus tumidus Name Homonyms Coscinodiscus tumidus Coscinodiscus tumidus Janisch, 1874