Hesperornis

== Translingual == === Etymology === From Ancient Greek ἕσπερος (hésperos, “western”) + ὄρνις (órnis, “bird”). === Proper noun === †Hesperornis m A taxonomic genus within the family †Hesperornithidae – flightless aquatic birds of the first half of the Campanian age. ==== Hypernyms ==== (genus): Eukaryota – superkingdom; Animalia – kingdom; Bilateria – subkingdom; Deuterostomia – infrakingdom; Chordata – phylum; Vertebrata – subphylum; Gnathostomata – infraphylum; Reptilia – class; Aves – subclass; Avebrevicauda, Pygostylia, Ornithothoraces, Ornithuromorpha, Carinatae, Ornithurae - clades; †Hesperornithiformes - order; †Hesperornithidae - family; †Hesperornithinae - subfamily ==== Hyponyms ==== (genus): †Hesperornis regalis - type species === References === Hesperornis on Wikipedia.Wikipedia Hesperornis on Wikispecies.Wikispecies Category:Hesperornis on Wikimedia Commons.Wikimedia Commons “Hesperornis”, in Paleobiology Database, 2026