Jump to ContentJump to Main Navigation
The SauropodsEvolution and Paleobiology$
Users without a subscription are not able to see the full content.

Kristina Curry Rogers

Print publication date: 2005

Print ISBN-13: 9780520246232

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520246232.001.0001

Show Summary Details
Page of

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: 28 September 2021

Phylogenetic and Taxic Perspectives on Sauropod Diversity

Phylogenetic and Taxic Perspectives on Sauropod Diversity

Chapter:
(p.104) Three Phylogenetic and Taxic Perspectives on Sauropod Diversity
Source:
The Sauropods
Author(s):

Paul Upchurch

Paul M. Barrett

Publisher:
University of California Press
DOI:10.1525/california/9780520246232.003.0004

This chapter explores the taxic and phylogenetic estimates of sauropod diversity. It specifically provides the alternative estimates of sauropod lineage diversity and evaluates the implications of these diversity patterns for the understanding of sauropod evolutionary history and sampling biases. The advantages and disadvantages of taxic diversity estimate (TDE) and phylogenetic diversity estimate (PDE) are explained. The impact of sampling biases might be evaluated by determining whether the opportunities to observe/collect specimens have remained approximately evenly distributed across time. Down-weighting strategies do not offer any real benefits, and in some cases such approaches will be more misleading than a simple equally weighted strategy. Sauropod diversity fluctuated considerably during their evolution, with major radiations occurring during the Middle and Late Jurassic. It is also clear that the sauropod fossil record has been affected by sampling biases, most notably in the early part of the Middle Jurassic and the Turonian-Coniacian.

Keywords:   sauropod diversity, evolutionary history, sampling biases, taxic diversity estimate, phylogenetic diversity estimate, fossil, Jurassic, phylogenetic estimate, taxic estimate

California Scholarship Online requires a subscription or purchase to access the full text of books within the service. Public users can however freely search the site and view the abstracts and keywords for each book and chapter.

Please, subscribe or login to access full text content.

If you think you should have access to this title, please contact your librarian.

To troubleshoot, please check our FAQs, and if you can't find the answer there, please contact us.