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...

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

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

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

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

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

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...