Transformation and diversification in early mammal evolution

@article{Luo2007TransformationAD,
  title={Transformation and diversification in early mammal evolution},
  author={Zhe‐Xi Luo},
  journal={Nature},
  year={2007},
  volume={450},
  pages={1011-1019}
}
Evolution of the earliest mammals shows successive episodes of diversification. Lineage-splitting in Mesozoic mammals is coupled with many independent evolutionary experiments and ecological specializations. Classic scenarios of mammalian morphological evolution tend to posit an orderly acquisition of key evolutionary innovations leading to adaptive diversification, but newly discovered fossils show that evolution of such key characters as the middle ear and the tribosphenic teeth is far more… 

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