? quadrangularis Greville Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Chromista phylum Ochrophyta class Bacillariophyceae order Triceratiales family Triceratiaceae genus Triceratium species Triceratium quadrangulare Name Homonyms ? quadrangularis Brues, 1933 ? quadrangularis Pia, 1914 ? quadrangularis Whidborne, 1891 ? quadrangularis Greville ? quadrangularis Lesquereux, 1868 ? quadrangularis Ramanujam, 1966