? calamarium Pallas, 1774 Dataset GBIF Backbone Taxonomy Rank UNRANKED Classification kingdom Animalia phylum Echinodermata class Echinoidea order Diadematoida family Diadematidae genus Echinothrix species Echinothrix calamaris Name Homonyms ? calamarium Pallas, 1774 ? calamarium Cope, 1875