million years ago). It is the only species of Hesperornis for which a nearly complete skull is known. Hesperornis crassipes was named in 1876 by Marsh, who...

freshwater habitats in the Northern Hemisphere, and include genera such as Hesperornis, Parahesperornis, Baptornis, Enaliornis, and Potamornis, all strong-swimming...

is a natural group which includes the common ancestor of Ichthyornis, Hesperornis, and all modern birds as well as all other descendants of that common...

and far between, at least compared with its contemporary relatives in Hesperornis. Remains are known from central North America, namely the former shallows...

In addition to non-crown group primitive birds like Archaeopteryx, Hesperornis and Confuciusornis, therefore, pan-group birds would include all dinosaurs...

birds. Using the then newly discovered fossils of Archaeopteryx and Hesperornis, Thomas Henry Huxley pronounced that they had evolved from dinosaurs...

radiolarians. The seaway was home to early birds, including the flightless Hesperornis that had stout legs for swimming through water and tiny wings used for...

noted the rare and unique quality of these toothed birds (including Hesperornis, which was found to also have teeth by 1877), and the irony of their...

Max (1 January 1935). "Colymbus, Hesperornis, Podiceps: ein Vergleich ihrer hinteren Extremität" [Colymbus, Hesperornis, Podiceps: a comparison of their...

Domyoji Death Note — Raye Penber, Anthony Rester Dinosaur Train — Jess the Hesperornis, Reggie the Raptorex Dragon Drive — Hikaru Himuro Dynasty Warriors: Gundam...

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

the late Cretaceous. Strong-swimming and toothed predatory waterbird Hesperornis roamed late Cretacean oceans. The ammonite Discoscaphites iris, Owl Creek...

Cretaceous period, the earliest being the Hesperornithiformes, like Hesperornis regalis, a flightless loon-like seabird that could dive in a fashion...

any other member of the Hesperornithes, with the possible exception of Hesperornis regalis, but still much is left to conjecture. The loon-sized bird was...

related to dinosaurs. Though some dinosaurs were or are semiaquatic, (Hesperornis, Spinosaurus, auks, penguins), none are known to have been fully marine...

publication, Thomas Henry Huxley used the fossils of Archaeopteryx and Hesperornis to argue that the birds are descendants of the dinosaurs. Thus, a group...

Waiter Mark Acheson as Marvin Mosasaurus Michael Adamthwaite as Jess Hesperornis, Reggie Raptorex Ashleigh Ball as Arnie Argentinosaurus, Crystal Cryolophosaurus...

had risen from the dinosaurs. He based this chiefly on the fossils of Hesperornis and Archaeopteryx, that were starting to become known at the time. In...

Phosphorosaurus hunts lanternfish under the ocean's moonlit surface. Hesperornis hunt for fish until they themselves are hunted by Xiphactinus. Nostoceras...

Hesperornis...

(Aves)". Steenstrupia. 16: 21–36. Stolpe, M. (January 1935). "Colymbus, Hesperornis, Podiceps:, ein Vergleich ihrer hinteren Extremität". J. Ornithol. (in...

Baptornis Brodavis Chupkaornis Enaliornis Judinornis Pasquiaornis Potamornis Hesperornithidae Asiahesperornis Canadaga Fumicollis Hesperornis Parahesperornis...

have been found in the Smoky Hill Chalk formation of western Kansas (Hesperornis zone, dated to 83.5 million years ago), time-equivalent beds of the Mooreville...

Baptornis Brodavis Chupkaornis Enaliornis Judinornis Pasquiaornis Potamornis Hesperornithidae Asiahesperornis Canadaga Fumicollis Hesperornis Parahesperornis...

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

& Chiappe 2015 †Parahesperornis alexi Martin 1980 (Late Cretaceous) †Hesperornis Marsh 1872 [Coniornis Marsh 1893; Lestornis Marsh 1876; Hargeria Lucas...

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

dinosaurs and other fossil animals, including Triceratops, Brontosaurus, and Hesperornis. At the request of Marsh and to house some of his discoveries, Peabody...

had made some remarkable discoveries: the huge Cretaceous aquatic bird Hesperornis, and the dinosaur footprints along the Connecticut River were worth the...

Baptornis Brodavis Chupkaornis Enaliornis Judinornis Pasquiaornis Potamornis Hesperornithidae Asiahesperornis Canadaga Fumicollis Hesperornis Parahesperornis...