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Historical Biogeography of Neotropical Freshwater Fishes$
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James Albert

Print publication date: 2011

Print ISBN-13: 9780520268685

Published to California Scholarship Online: March 2012

DOI: 10.1525/california/9780520268685.001.0001

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Species Richness and Cladal Diversity

Species Richness and Cladal Diversity

(p.88) (p.89) Five Species Richness and Cladal Diversity
Historical Biogeography of Neotropical Freshwater Fishes

James S. Albert

Henry J. Bart

Roberto E. Reis

University of California Press

This chapter describes relationships between species richness and cladal diversity in the two largest regional ichthyofaunas of the Americas: the Amazon and Mississippi superbasins. It explains that species richness profiles of both faunas are hollow curve distributions in which most species are members of a few highly diverse clades and in which most clades are species poor. The species-richness profiles also show that the majority of clades in both faunas were derived from marine lineages during the Cenozoic, although these clades represent only a small fraction of the species.

Keywords:   species richness, cladal diversity, regional ichthyofaunas, Amazon basins, Mississippi basins, marine lineages

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