About: Hesperornithes   Sponge Permalink

An Entity of Type : owl:Thing, within Data Space : 134.155.108.49:8890 associated with source dataset(s)

Hesperornithes is an extinct and highly specialized clade of Cretaceous toothed birds. Hesperornithine birds, apparently limited to former aquatic habitats in the Northern Hemisphere, include genera such as Hesperornis, Parahesperornis, Baptornis, Enaliornis, and probably Potamornis, all strong-swimming predatory waterbirds. Many, if not all species were completely flightless. The largest known hesperornithine, described in 1999 and named Canadaga arctica, may have reached a maximum adult length of over 1.5 meters (five feet).

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  • Hesperornithes
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  • Hesperornithes is an extinct and highly specialized clade of Cretaceous toothed birds. Hesperornithine birds, apparently limited to former aquatic habitats in the Northern Hemisphere, include genera such as Hesperornis, Parahesperornis, Baptornis, Enaliornis, and probably Potamornis, all strong-swimming predatory waterbirds. Many, if not all species were completely flightless. The largest known hesperornithine, described in 1999 and named Canadaga arctica, may have reached a maximum adult length of over 1.5 meters (five feet).
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  • *Enaliornithidae *Baptornithidae *Hesperornithidae
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  • Hesperornithes
  • (Fürbringer, 1888)
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  • Class
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  • (Cracraft, 1982 ) *Odontolcae
  • (Marsh, 1873 ) *Gaviomorphae
  • (Marsh, 1875)
  • *Odontornithes
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  • Subclass
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  • Synonyms
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  • Order
dbkwik:fossil/prop...iPageUsesTemplate
Name
  • Hesperornithes
Caption
  • Hesperornis
fossil range
  • Late Cretaceous
abstract
  • Hesperornithes is an extinct and highly specialized clade of Cretaceous toothed birds. Hesperornithine birds, apparently limited to former aquatic habitats in the Northern Hemisphere, include genera such as Hesperornis, Parahesperornis, Baptornis, Enaliornis, and probably Potamornis, all strong-swimming predatory waterbirds. Many, if not all species were completely flightless. The largest known hesperornithine, described in 1999 and named Canadaga arctica, may have reached a maximum adult length of over 1.5 meters (five feet). Hesperornithine birds were, strictly speaking, the only Mesozoic dinosaurs to colonize the oceans (technically speaking, all birds are dinosaurs); the aquatic reptiles of their time, such as the ichthyosaurs and plesiosaurs, were not dinosaurs. Hesperornithine birds went extinct at the K-T boundary, along with enantiornithine protobirds, all non-avian dinosaurs, and many other life forms.
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