Sphenocoelus hyognathus (Osborn, 1889) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata class Mammalia order Perissodactyla family Brontotheriidae genus Sphenocoelus species Palaeosyops hyognathus Name Homonyms Sphenocoelus hyognathus (Osborn, 1889)