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Evolution of Birds
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Details
The evolution of birds is thought to have begun in the Jurassic Period, with the earliest birds derived from theropod dinosaurs. Birds are categorized as a biological class, Aves. The earliest known species of class Aves is Archaeopteryx lithographica, from the Late Jurassic period, though Archaeopteryx is not commonly considered to have been a true bird. Modern phylogenies place birds in the dinosaur clade Theropoda. According to the current consensus, Aves and a sister group, the order Crocodilia, together are the sole living members of an unranked "reptile" clade, the Archosauria. Phylogenetically, Aves is usually defined as all descendants of the most recent common ancestor of a specific modern bird species (such as the House Sparrow, Passer domesticus), and either Archaeopteryx, or some prehistoric species closer to Neornithes (to avoid the problems caused by the unclear relationships of Archaeopteryx to other theropods). If the latter classification is used then the larger group is termed Avialae. Currently, the relationship between dinosaurs, Archaeopteryx, and modern birds is still under debate.
Weitere Informationen
- Allgemeine Informationen
- GTIN 09786130636203
- Editor Frederic P. Miller, Agnes F. Vandome, John McBrewster
- Sprache Englisch
- Größe H220mm x B150mm x T11mm
- Jahr 2010
- EAN 9786130636203
- Format Fachbuch
- ISBN 978-613-0-63620-3
- Titel Evolution of Birds
- Untertitel Jurassic, Bird, Dinosaur, Class (biology), Archaeopteryx, Clade, Theropoda, Reptile, Archosaur, Phylogenetics, House Sparrow, Modern birds, Origin of birds, Bird conservation
- Gewicht 278g
- Herausgeber Alphascript Publishing
- Anzahl Seiten 176
- Genre Biologie
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