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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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PRINTED FROM CALIFORNIA SCHOLARSHIP ONLINE (www.california.universitypressscholarship.com). (c) Copyright University of California Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in CALSO for personal use.date: 17 September 2021

Paleogene Radiations

Paleogene Radiations

Chapter:
(p.105) Six Paleogene Radiations
Source:
Historical Biogeography of Neotropical Freshwater Fishes
Author(s):

Hernán López-Fernández

James S. Albert

Publisher:
University of California Press
DOI:10.1525/california/9780520268685.003.0006

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

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