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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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Basal Avialae

Basal Avialae

Chapter:
(p.210) Eleven Basal Avialae
Source:
The Dinosauria
Author(s):

Kevin Padian

Publisher:
University of California Press
DOI:10.1525/california/9780520242098.003.0013

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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