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The Dinosauria$
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David Weishampel

Print publication date: 2004

Print ISBN-13: 9780520242098

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520242098.001.0001

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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 03 August 2021

Basal Avialae

Basal Avialae

(p.210) Eleven Basal Avialae
The Dinosauria

Kevin Padian

University of California Press

The first animal universally accepted as a true bird is Archaeopteryx lithographica. In this chapter, the name Avialae is introduced to encompass Archaeopteryx and living birds, with Aves/Neornithes considered the crown taxon. It focuses on basal birds and aims to summarize the early history of birds and their evolution from other theropod dinosaurs. It also discusses the diagnostic features, phylogeny, and biogeography of basal birds. The chapter also examines the phylogenetic transformation of feathers and the origin and adaptation of flight.

Keywords:   Archaeopteryx lithographica, Avialae, Aves, Neornithes, basal birds, theropod dinosaurs, birds, feathers, flight

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