Chapter

Basal Avialae

Kevin Padian

in The Dinosauria

Published by University of California Press

Published in print June 2004 | ISBN: 9780520242098
Published online March 2012 | e-ISBN: 9780520941434 | DOI: http://dx.doi.org/10.1525/california/9780520242098.003.0013
Basal Avialae

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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

Chapter.  14536 words.  Illustrated.

Subjects: Evolutionary Biology

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