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Книга Avian Ancestors Fernando Novas

Avian Ancestors

A Review of the Phylogenetic Relationships of the Theropods Unenlagiidae, Microraptoria, Anchiornis and Scansoriopterygidae

Автор: Fernando Novas, Federico Agnolín
Език: Английски език
Корици: С меки корици
Издател: Springer
Наличност: Външен склад
Изпращаме след 5-8 дни
52.77 € 103.22 лв
Although consensus exists among researchers that birds evolved from coelurosaurian theropods, paleon...

Информация за книгата

Автор
Fernando Novas, Federico Agnolín
Език
Английски език
Корици
Книга - С меки корици
Издадена
2013
страници
96
EAN
9789400756366
ISBN
9400756364
Enbook ID
01980368
Издател
Springer
Теглоt
1766
Размери
155 x 235 x 7

Пълно описание

Although consensus exists among researchers that birds evolved from coelurosaurian theropods, paleontologists still debate the identification of the group of coelurosaurians that most closely approaches the common ancestor of birds. The last 20 years witnessed the discovery of a wide array of avian-like theropods that has considerably amplified the anatomical disparity among deinonychosaurians, some of which resemble Archaeopteryx more than Deinonychus. Among these newly discovered theropods that show remarkable bird-like characteristics are the four-winged theropods Microraptor and Anchiornis, and the unenlagiids Unenlagia, Buitreraptor, and Rahonavis. A bizarre group of minute-sized coelurosaurs, the Scansoriopterygidae, also exhibits some avian similarities that lead some authors to interpret them as more closely related to birds than other dinosaurs. With the aim to explore the phylogenetic relationships of these coelurosaurians and birds, we merged recently published integrative databases, resulting in significant changes in the topological distribution of taxa within Paraves. We present evidence that Dromaeosauridae, Microraptoria, Unenlagiidae, and Anchiornis + Xiaotingia form successive sister taxa of Aves, and that the Scansoriopterygidae are basal coelurosaurians not closely related to birds. The implications in the evolutionary sequence of anatomical characters leading to birds, including the origin of flight, are also considered in light of this new phylogenetic hypothesis.

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