Basal Ornithurae (Taxonomic Rank: Genus)
Extinct, ancestrial Ornithurae including the Liaoningornithiformes, Chaoyangiiformes, Hesperornithiformes, Ambiortiformes, Ichthyornithiformes, and Apatornithidae.

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	Ambiortus Apatornis Apsaravis Asiahesperornis Baptornis Chaoyangia Coniornis Enaliornis Gansus Gargantuavis Hesperornis Horezmavis Ichthyornis Judinornis Kuszholia Liaoningornis Limenavis Parahesperornis Pasquiaornis Patagopteryx Potamornis Songlingornis Yanornis Yixianornis

= Extinct Life Forms   = Living Creatures   = Fictional Beasts   = Inanimate Objects   = Ethereal Entities    = At least one collectible is catalogued