The Amazon-Paraguay Divide

Tiago P. Carvalho and James S. Albert

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:
The Amazon-Paraguay Divide

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This chapter examines the impact of the Amazon-Paraguay divide on the whole ichthyofauna. It suggests that Nathan Everett Pearson’s “The Fishes of the Beni-Mamoré and Paraguay Basins, and a Discussion of the Origin of the Paraguayan Fauna” provided a very modern discussion of the reasons for the similarities of the fishes of these two large tropical river systems. The phylogenetic and biogeographic data reviewed in this chapter suggest a complex history of vicariance and (geo)dispersal across several watersheds, combined with the evolution of an endemic Paraguayan ichthyofauna, as well as extinction.

Keywords: Amazon-Paraguay divide; ichthyofauna; Nathan Everett Pearson; fishes; tropical river systems; vicariance

Chapter.  9388 words.  Illustrated.

Subjects: Aquatic Biology

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