Chapter

Paleogene Radiations

Hernán López-Fernández 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: http://dx.doi.org/10.1525/california/9780520268685.003.0006
Paleogene Radiations

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This chapter evaluates the central role of Paleogene geological and climactic events on the early diversification of the dominant fish clades. It reviews evidence for the hypothesis that Paleocene radiations of freshwater teleosts filled a newly emerged proto-Amazon-Orinoco river valley that drained the Sub-Andean Foreland. The findings indicate that the foreland basin may have been significantly depleted of Mesozoic fishes by a succession of marine transgressions during the Upper Cretaceous-Early Paleocene and that the foreland basin may have served as an important cradle for the diversification of the modern ichthyofauna.

Keywords: Paleogene; fish clades; diversification; freshwater teleosts; proto-Amazon-Orinoco river valley; Mesozoic fishes; foreland basin; modern ichthyofauna

Chapter.  12513 words.  Illustrated.

Subjects: Aquatic Biology

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