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Avian Ancestors

Avian Ancestors

Author: Federico Agnolin, Fernando E. Novas
Publisher: Springer Science & Business Media
ISBN: 9400756372
Pages: 96
Year: 2013-02-26
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.
Dreimal Deutsch

Dreimal Deutsch

Author: Uta Matecki
Publisher: Emc Pub
ISBN: 082192222X
Pages:
Year: 2000-01-01

Arena of Capital

Arena of Capital

Author:
Publisher: Macmillan International Higher Education
ISBN: 1349171077
Pages: 410
Year: 1983-07-01

Challenge and Response a Programme for Europe

Challenge and Response a Programme for Europe

Author: Franz Josef Strauss
Publisher:
ISBN:
Pages:
Year: 1970

Picture Dictionary for Young Learners

Picture Dictionary for Young Learners

Author: Andrew Wright
Publisher: Addison-Wesley Longman
ISBN: 0175568790
Pages: 107
Year: 1992
The Picture Dictionary is an active learning tool for young children embarking on English and has a wordlist of over 1000 carefully selected words. A separate 16-page section gives a description of a wide range of extra games and oral activities.
Telling Tales in English

Telling Tales in English

Author: Megan James, Wendy Superfine
Publisher: Delta Publishing Company(IL)
ISBN: 1900783495
Pages: 83
Year: 2003
For teachers of young children - stimulating activities that practice specific language and vocabulary, based around well-known stories.
Network Now A1 - Student's Book mit 3 Audio-CDs

Network Now A1 - Student's Book mit 3 Audio-CDs

Author: Olivia Rainsford, Midlane, Viv, Lynda Hübner, Gaynor Ramsey, Vanessa Clark, Sharon Heduvan
Publisher: Ernst Klett Sprachen GmbH
ISBN: 3126065880
Pages: 192
Year: 2011

Refresh Now A2

Refresh Now A2

Author: Vanessa Clark, Lynda Hübner
Publisher: Ernst Klett Sprachen GmbH
ISBN: 3126051871
Pages: 144
Year: 2015-05-29

Die Rache Des Computers

Die Rache Des Computers

Author: Bottcher, Hinz, Lang
Publisher:
ISBN: 0821938061
Pages:
Year: