Apatosaurus louisae (Holland, 1915) Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata family Diplodocidae genus Apatosaurus species Apatosaurus louisae Name Synonyms Apatosaurus laticollis (Marsh, 1879) Apatosaurus loisae (Holland, 1915) Atlantosaurus laticollis (Marsh, 1879) Atlantosaurus louisae (Holland, 1915) Homonyms Apatosaurus louisae (Holland, 1915)