Structure and Relationships of Opisthocœlian Dinosaurs PDF Download
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Author: Arthur Ware Slocom
Publisher:
ISBN:
Category : Apatosaurus
Languages : en
Pages : 650
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Book Description
Author: Arthur Ware Slocom
Publisher:
ISBN:
Category : Apatosaurus
Languages : en
Pages : 650
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 468
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 650
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Book Description
Author:
Publisher:
ISBN:
Category : Geology
Languages : en
Pages : 584
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Book Description
Author: Michael J. Benton
Publisher: Cambridge University Press
ISBN: 9780521545822
Category : Nature
Languages : en
Pages : 744
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Book Description
Unique reference volume covering major vertebrate fossil finds in former Soviet Union never before described in English.
Author: John R. Foster
Publisher: New Mexico Museum of Natural History and Science
ISBN:
Category : Morrison Formation
Languages : en
Pages : 100
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Book Description
Author: Samuel Wendell Williston
Publisher:
ISBN:
Category : Plesiosauria
Languages : en
Pages : 714
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Book Description
Author: Fernando E. Novas
Publisher: Indiana University Press
ISBN: 0253352894
Category : Nature
Languages : en
Pages : 482
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Book Description
The remarkable dinosaur faunas of South America
Author: Professor David Batten
Publisher: Wiley-Blackwell
ISBN: 9781444367119
Category : Science
Languages : en
Pages : 0
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Book Description
This Field Guide to Fossils deals with almost the complete flora and fauna of the whole English Wealden.
Author: Federico Agnolin
Publisher: Springer Science & Business Media
ISBN: 9400756372
Category : Science
Languages : en
Pages : 100
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Book Description
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.
