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

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...

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

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...

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

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

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

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

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

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

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

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

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

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...

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...

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...

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

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

J.A (2004). "Morphology, phylogenetic taxonomy, and systematics of Ichthyornis and Apatornis (Avialae: Ornithurae)" (PDF). Bulletin of the American...

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

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...

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

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

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...

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

134.8 millimeters compared to 71.5 millimeters for the largest known Ichthyornis upper arm bone, specimen YPM 1742. Extrapolation from the humerus shaft...

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

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