Hesperorthis onniensis Whittard & Barker, 1950 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Brachiopoda class Rhynchonellata family Dolerorthidae genus Hesperorthis species Hesperorthis onniensis Name Homonyms Hesperorthis onniensis Whittard & Barker, 1950