million years ago. Ichthyornis is a common component of the Niobrara Formation fauna, and numerous specimens have been found. Ichthyornis has been historically...

Juan Benito and colleagues in 2022 as "the smallest clade containing Ichthyornis dispar, Hesperornis regalis, and Vultur gryphus". Ernst Haeckel coined...

to the group's namesake, Ichthyornis. However, these seem to have been more closely related to modern birds than to Ichthyornis dispar. In Julia Clarke's...

Hesperornis than to Baptornis. Hesperornitheans were originally combined with Ichthyornis in the paraphyletic group "Odontornithes" by Othniel Charles Marsh, in...

as lobed toes for this group. Like many other Mesozoic birds such as Ichthyornis, Hesperornis had teeth as well as a beak. In the hesperornithiform lineage...

steering rather than flight; and the tern-like Ichthyornis, an early avian with a toothy beak. Ichthyornis shared the sky with large pterosaurs such as...

However, a neognath-like palate is also present in ornithuran birds like Ichthyornis. Neognathae was long ranked as a superorder subdivided into orders. Attempts...

and diving species. The latter included the superficially gull-like Ichthyornis and the Hesperornithiformes, which became so well adapted to hunting...

includes modern birds (Neornithes) and extinct related groups, such as Ichthyornis and Hesperornithes. The genus Gansus contains a single species, G. yumenensis...

Bhullar, B.S.; Burnham, D.; Field, D.J. (2022). "Forty new specimens of Ichthyornis provide unprecedented insight into the postcranial morphology of crownward...

Bhullar, B.S.; Burnham, D.; Field, D.J. (2022). "Forty new specimens of Ichthyornis provide unprecedented insight into the postcranial morphology of crownward...

Its type species was originally classified as Ichthyornis celer. A. celer was long allied with Ichthyornis, having been assigned to Ichthyornidae by Marsh...

somewhat taller H. crassipes, and Ichthyornis dispar. Hesperornis looked somewhat similar to a loon, while Ichthyornis was quite similar to a gull or petrel...

advanced than Ichthyornis but less advanced than modern birds. Clarke, J.A. (2004). "Morphology, phylogenetic taxonomy, and systematics of Ichthyornis and Apatornis...

belongs to the pangalliforms. Austinornis lentus (formerly referred to as Ichthyornis lentus, Graculavus lentus, or Pedioecetes lentus) was found in the Late...

from birth to death. New teeth are created within old teeth. A skull of Ichthyornis discovered in 2014 suggests that the beak of birds may have evolved from...

It is known from several aquatic amniotes: ichthyosaurs, Hesperornis, Ichthyornis, juvenile caimans, some cetaceans and even some ctenochasmatoid pterosaurs...

the slightly younger Martinavis and "Ichthyornis" minusculus, which was originally misidentified as Ichthyornis based on its presence in marine deposits...

Confuciusornis, a genus of crow-sized birds from the Early Cretaceous Ichthyornis was a toothed, seabird-like ornithuran from the Late Cretaceous Rhynchocephalians...

Chiappe found Limenavis to be a member of Carinatae more advanced than Ichthyornis but not a member of the modern bird group Neornithes. A 2013 analysis...

cerebellum and optic lobe lateral to the telencephalon, is found in Ichthyornis, a bird that lived 70 million years ago and closely related to modern...

but closer and later relatives of modern birds such as Hesperornis and Ichthyornis were toothed, indicating that the loss of teeth occurred convergently...

†Guildavis †Iaceornis †Kookne †Limenavis †Tingmiatornis †Ichthyornithes Ichthyornis Janavis †Hesperornithes †Vegaviidae Australornis? Maaqwi? Neogaeornis...

Other areas of interest to paleornithologists are the early sea-birds Ichthyornis, Hesperornis, and others. Notable paleornithologists are Storrs L. Olson...

coastline and co-existed with more "primitive" types of birds such as Ichthyornis. Asteriornis is one of the oldest-known birds irrefutably belonging to...

†Guildavis †Iaceornis †Kookne †Limenavis †Tingmiatornis †Ichthyornithes Ichthyornis Janavis †Hesperornithes †Vegaviidae Australornis? Maaqwi? Neogaeornis...

eventually interrupted by a mostly-blind Deinosuchus named Dil and an Ichthyornis named Ichy, who intend to eat them. Dil and Ichy pursue Littlefoot and...

as did the dromaeosaurid Mahakala. The avialans Confuciusornis and Ichthyornis grew relatively quickly, following a growth trend similar to that of...

Diracodon (1881) Dryosaurus (1894) Dryptosaurus (1877) Hesperornis (1872) Ichthyornis (1873) Labrosaurus (1896) Laosaurus (1878) Lestornis (1876) Nanosaurus...

†Guildavis †Iaceornis †Kookne †Limenavis †Tingmiatornis †Ichthyornithes Ichthyornis Janavis †Hesperornithes †Vegaviidae Australornis? Maaqwi? Neogaeornis...