Alternative spellings: Ichthornithiformes, Ichthyornithiformes, Ichthyornithiformes
Full reference: O. C. Marsh. 1873. On a new sub-class of fossil birds (Odontornithes). American Journal of Science and Arts 5(2):161-162
Parent taxon: Ornithurae according to J. Benito et al. 2022
See also Benito et al. 2022, Chatterjee 1991, Clarke 2004, Clarke et al. 2005, Elzanowski et al. 2001, Gadow 1898, Hay 1930, Jaekel 1911, Livezey and Zusi 2007, Marsh 1873, Marsh 1873, Marsh 1875, Martin 1984, Padian 2004, Sepkoski 2002, Wetmore 1940, Wetmore 1956 and Wetmore 1960
Sister taxa: Apatornis, Archaeovolans, Carinatae, Cerebavis, Changzuiornis, Chaoyangiformes, Chaoyangornithiformes, Dromaeognathae, Gargantuaviidae, Gobipterygiformes, Guildavis, Hesperornithiformes, Iaceornis, Kookne, Kuszholia, Liaoningornithiformes, Limenavis, Odontoholcae, Odontoholomorphae, Qinornis, Tingmiatornis, Yanornithiformes, Yixianornithiformes
Subtaxa: Apatornithidae Ichthyornis Ichthyornithidae Janavis
Ecology: ground dwelling carnivore
Distribution:
• Cretaceous of Belgium (1 collection), Canada (5: Alberta, Manitoba, Saskatchewan), Mexico (1), United States (27: Alabama, California, Kansas, New Mexico, Texas), Uzbekistan (1)
Total: 35 collections including 36 occurrences