• Thumbnail for Hesperornithes
    Hesperornithes is an extinct and highly specialized group of aquatic avialans closely related to the ancestors of modern birds. They inhabited both marine...
    13 KB (1,279 words) - 04:51, 19 March 2024
  • Thumbnail for Ornithurae
    definition: "extant birds and all other taxa, such as Ichthyornis and Hesperornithes, that are closer to extant birds than is Archaeopteryx". Later he and...
    7 KB (519 words) - 11:48, 26 May 2024
  • Thumbnail for Potamornis
    2001: Potamornis skutchi. This was almost certainly a member of the Hesperornithes, the hefty and toothed flightless diving birds of the Mesozoic seas...
    2 KB (229 words) - 05:53, 21 March 2024
  • Thumbnail for Paleogene
    penguins, ratites, and terror birds also filled niches left by the hesperornithes and other extinct dinosaurs. Pronounced cooling in the Oligocene resulted...
    27 KB (2,884 words) - 01:52, 11 August 2024
  • Thumbnail for Baptornis
    exists for the ecology of B. advenus than for any other member of the Hesperornithes, with the possible exception of Hesperornis regalis, but still much...
    9 KB (1,045 words) - 11:28, 29 April 2023
  • Thumbnail for Late Cretaceous
    bizarre as Yungavolucris and Avisaurus. Though mostly small, marine Hesperornithes became relatively large and flightless, adapted to life in the open...
    18 KB (1,693 words) - 15:07, 10 August 2024
  • Thumbnail for Maastrichtian
    archaic clades of birds, such as Enantiornithes, Ichthyornithes, and Hesperornithes, persisted to the latest Maastrichtian but became extinct during the...
    16 KB (1,396 words) - 22:20, 13 August 2024
  • Thumbnail for Bird
    Hesperornithes...
    235 KB (23,446 words) - 04:48, 13 August 2024
  • mid-Maastrichtian age, about 67 million years ago. It was a member of the Hesperornithes, flightless toothed seabirds of the Cretaceous. Among these, it belonged...
    4 KB (309 words) - 19:26, 31 October 2023
  • of enantiornithe and ornithurine forms. Though mostly small, marine hesperornithes became relatively large and flightless, adapted to life in the open...
    41 KB (4,326 words) - 11:45, 3 July 2024