Chapter

Species Richness and Cladal Diversity

James S. Albert, Henry J. Bart and Roberto E. Reis

in Historical Biogeography of Neotropical Freshwater Fishes

Published by University of California Press

Published in print August 2011 | ISBN: 9780520268685
Published online March 2012 | e-ISBN: 9780520948501 | DOI: http://dx.doi.org/10.1525/california/9780520268685.003.0005
Species Richness and Cladal Diversity

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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

Chapter.  11388 words.  Illustrated.

Subjects: Aquatic Biology

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