Origin and evolution of the grazing guild in new world terrestrial mammals.

@article{MacFadden1997OriginAE,
  title={Origin and evolution of the grazing guild in new world terrestrial mammals.},
  author={Bruce J. MacFadden},
  journal={Trends in ecology & evolution},
  year={1997},
  volume={12 5},
  pages={182-7}
}
Although vertebrate herbivory has existed on land for about 300 million years, the grazingadaptation, principally developed in mammals, did not appear until the middle Cenozoic about 30 million years ago. Paleontological evidence indicates that grazing mammals diversified at the time of the spread of grasslands. Recently revised fossil calibrations reveal that the grazing mammal guild originated during the early Miocene in South America about 10-15 million years earlier than it did during the… CONTINUE READING
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