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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 Ornithopoda

Basal Ornithopoda

(p.393) Eighteen Basal Ornithopoda
The Dinosauria

David B. Norman

Hans-Dieter Sues

Lawrence M. Witmer

Rodolfo A. Coria

University of California Press

Ornithopoda is a clade of bipedal and unarmored herbivorous dinosaurs with complex dentitions. It includes the small heterodontosaurids from the Early Jurassic and euornithopods, which range widely in body size and are known from the Middle Jurassic to the end of the Cretaceous. This chapter examines the anatomy, phylogeny, and paleobiology of basal ornithopods. Many of the ornithopods described in this chapter, particularly heterodontosaurids, are among the smallest known ornithischians. Fossil remains of heterodontosaurids are distributed in South Africa, the United States, England and China. Basal euornithopods have been collected from Asia, Australia, Europe, South America, North America, and Antarctica.

Keywords:   Ornithopoda, herbivorous dinosaurs, heterodontosaurids, euornithopods, basal ornithopods

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