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Subterranean RodentsMosaic Evolution of Subterranean Mammals: Tinkering, Regression, Progression, and Global Convergence

Subterranean Rodents: Mosaic Evolution of Subterranean Mammals: Tinkering, Regression,... Mosaic Evolution of Subterranean Mammals: Tinkering, Regression, Progression, and Global Convergence Eviatar Nevo 28.1 Overview The extensive convergent evolution of subterranean mammals across the planet (Nevo 1999) began during the global climatic transition from the middle Eocene to the early Oligocene, 45−35 million years ago. It in- volved seasonal stresses proceeding progressively throughout the Cenozoic. The ecological theater of open country biota set the stage for a rapid evo- lutionary play of recurrent adaptive radiations of unrelated mammals on all continents to the subterranean ecotope. The biota comprised marsupial and placental mammals (insectivores and herbivores) that involve several hundreds of small mammalian species belonging, at present, to fifty genera, eleven families, and three mammalian orders. The stressful underground ecotope (solid soil, darkness, low produc- tivity, hypercapnia, hypoxia, and high infectivity) provided subterranean mammals with shelter from extreme climatic (temperature and humid- ity) fluctuations and predators. All subterranean mammals share conver- gent molecular and organismal adaptations with a shared unique ecotope. By contrast, they display divergent adaptations to their separated herbiv- orous and insectivorous feeding niches and structures derived from their different phylogenies. The subterranean ecotope is simple, relatively stable, specialized, low in productivity, and discontinuous. Its major determinants are http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

Subterranean RodentsMosaic Evolution of Subterranean Mammals: Tinkering, Regression, Progression, and Global Convergence

Editors: Begall, Sabine; Burda, Hynek; Schleich, Cristian E.
Subterranean Rodents — Jan 1, 2007

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References (29)

Publisher
Springer Berlin Heidelberg
Copyright
© Springer-Verlag Berlin Heidelberg 2007
ISBN
978-3-540-69275-1
Pages
375 –388
DOI
10.1007/978-3-540-69276-8_28
Publisher site
See Chapter on Publisher Site

Abstract

Mosaic Evolution of Subterranean Mammals: Tinkering, Regression, Progression, and Global Convergence Eviatar Nevo 28.1 Overview The extensive convergent evolution of subterranean mammals across the planet (Nevo 1999) began during the global climatic transition from the middle Eocene to the early Oligocene, 45−35 million years ago. It in- volved seasonal stresses proceeding progressively throughout the Cenozoic. The ecological theater of open country biota set the stage for a rapid evo- lutionary play of recurrent adaptive radiations of unrelated mammals on all continents to the subterranean ecotope. The biota comprised marsupial and placental mammals (insectivores and herbivores) that involve several hundreds of small mammalian species belonging, at present, to fifty genera, eleven families, and three mammalian orders. The stressful underground ecotope (solid soil, darkness, low produc- tivity, hypercapnia, hypoxia, and high infectivity) provided subterranean mammals with shelter from extreme climatic (temperature and humid- ity) fluctuations and predators. All subterranean mammals share conver- gent molecular and organismal adaptations with a shared unique ecotope. By contrast, they display divergent adaptations to their separated herbiv- orous and insectivorous feeding niches and structures derived from their different phylogenies. The subterranean ecotope is simple, relatively stable, specialized, low in productivity, and discontinuous. Its major determinants are

Published: Jan 1, 2007

Keywords: Small Heat Shock Protein; Retinal Input; Cone Opsin; Spotted Array; Mosaic Evolution

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