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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 Ornithischia

Basal Ornithischia

(p.325) Fourteen Basal Ornithischia
The Dinosauria

David B. Norman

Lawrence M. Witmer

David B. Weishampel

University of California Press

This chapter presents a cladistic analysis of the phylogenetic relationships of basal Ornisthischia. Ornithischia is a stem-based taxon defined as all dinosaurs closer to Iguanodon than to Cetiosaurus. Basal ornithischians includes Lesothosaurus, Pisanosaurus, and Technosaurus, Basal ornithischians are small (1-2 m long), obligate bipeds that exhibit anatomical features normally linked with a herbivourous diet. Because fossil remains of basal ornithicians are rare, little can be said about their paleoecology. Local environments from which these animals derive represent chiefly semiarid habitats. As herbivores, they may have been active foragers of ground cover and shrubby vegetation.

Keywords:   cladistic analysis, basal Ornisthischia, Ornithischia, Lesothosaurus, Pisanosaurus, Technosaurus

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