Hemipatagus argutus (Clark & Twitchell, 1915) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Echinodermata class Echinoidea order Spatangoida family Loveniidae genus Hemipatagus species Hemipatagus argutus Name Synonyms Maretia arguta (Clark & Twitchell, 1915) Homonyms Hemipatagus argutus (Clark & Twitchell, 1915)