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Comparative BiogeographyDiscovering and Classifying Biogeographical Patterns of a Dynamic Earth$
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Lynne Parenti

Print publication date: 2009

Print ISBN-13: 9780520259454

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520259454.001.0001

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Building Blocks of Biogeography: Biotic Areas and Area Homology

Building Blocks of Biogeography: Biotic Areas and Area Homology

(p.75) Four Building Blocks of Biogeography: Biotic Areas and Area Homology
Comparative Biogeography

Lynne R. Parenti

Malte C. Ebach

University of California Press

This chapter discusses the role of biotic areas in biogeography. A biotic area consists of homologous area relationships expressed by more than one monophyletic group that inhabits a common place and/or a designated endemic area. Relationships among biotic areas are recognized as area homologs and area monophyly. An area homolog is the smallest unit of meaningful cladistic relationship among areas. The chapter illustrates methods for discovering area homologies and area monophyly. Area homology is found by comparing area homologs among endemic areas to discover area monophyly or geographical congruence. Area homology, or area monophyly, is discovered when different areagrams are compared and their area homologs corroborate those of other areagrams.

Keywords:   biotic areas, biogeography, endemic area, area homologs, area monophyly, geographical congruence, area homology, areagrams

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