Placental mammal diversification and the Cretaceous–Tertiary boundary

  title={Placental mammal diversification and the Cretaceous–Tertiary boundary},
  author={M. Springer and W. Murphy and E. Eizirik and S. O'Brien},
  journal={Proceedings of the National Academy of Sciences of the United States of America},
  pages={1056 - 1061}
  • M. Springer, W. Murphy, +1 author S. O'Brien
  • Published 2003
  • Biology, Medicine
  • Proceedings of the National Academy of Sciences of the United States of America
  • Competing hypotheses for the timing of the placental mammal radiation focus on whether extant placental orders originated and diversified before or after the Cretaceous-Tertiary (K/T) boundary. Molecular studies that have addressed this issue suffer from single calibration points, unwarranted assumptions about the molecular clock, and/or taxon sampling that lacks representatives of all placental orders. We investigated this problem using the largest available molecular data set for placental… CONTINUE READING
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