Ichthyornis dispar Marsh, 1872 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata class Aves family Ichthyornithidae genus Ichthyornis species Ichthyornis dispar Name Synonyms Angelinornis antecessor (Wetmore, 1962) Graculavus agilis (Marsh, 1873) Ichthyornis agilis (Marsh, 1873) Ichthyornis antecessor (Wetmore, 1962) Ichthyornis validus Marsh, 1880 Ichthyornis victor Marsh, 1876 Plegadornis antecessor (Wetmore, 1962) Homonyms Ichthyornis dispar Marsh, 1872