Helohyus plicodon Marsh, 1872 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata class Mammalia order Artiodactyla family Helohyidae genus Helohyus species Helohyus plicodon Name Synonyms Helohyus validus (Marsh, 1872) Thinotherium validum (Marsh, 1872) Homonyms Helohyus plicodon Marsh, 1872