Hemiaster bexari Clark & Twitchell, 1915 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Echinodermata class Echinoidea order Spatangoida family Hemiasteridae genus Hemiaster species Hemiaster wetherbyi Name Homonyms Hemiaster bexari Clark & Twitchell, 1915