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Pages in category "Cretaceous birds of North America" This category contains only the following page. This list may not reflect recent changes. A. Avisaurus
Cretaceous period birds, in the Mesozoic Era. The Cretaceous is a geologic period and system from circa 145 million years ago to 66 million years ( Ma ) ago. See also the succeeding Category:Paleogene birds
Ichthyornithes is an extinct group of toothed avialan dinosaurs very closely related to the common ancestor of all modern birds.They are known from fossil remains found throughout the late Cretaceous period of North America, though only two genera, Ichthyornis and Janavis, are represented by complete enough fossils to have been named.
Pages in category "Late Cretaceous birds of North America" The following 20 pages are in this category, out of 20 total. This list may not reflect recent changes. A.
A terrestrial dinosaur genus in both continents would then support Brett — Surman's theory that there had been a land connection between the two continents. [ 6 ] Further discoveries and further study by Chiappe showed that all of the material belonged to enantiornithine birds, and PVL 4690 was given its own genus Soroavisaurus .
Ichthyornis (meaning "fish bird", after its fish-like vertebrae) is an extinct genus of toothy seabird-like ornithuran from the late Cretaceous period of North America.Its fossil remains are known from the chalks of Alberta, Alabama, Kansas (Greenhorn Limestone), New Mexico, Saskatchewan, and Texas, in strata that were laid down in the Western Interior Seaway during the Turonian through ...
The shared history of birds and dinosaurs is well-established, but exactly how true birds evolved during the Mesozoic is a bit of a mystery. Adding to this conundrum are fossilized footprints of ...
An ornithurine, also present in the Lance Formation and Fort Union Formation, one of the few individual bird species known to have survived the Cretaceous–Paleogene extinction [90] "Unnamed ornithurine D" [90] Unnamed Montana [90] UCMP 187207, a partial coracoid [90] An ichthyornithean also present in the Frenchman Formation [90]