Extinction and re-evolution of similar adaptive types (ecomorphs) in Cenozoic North American ungulates and carnivores reflect van der Hammen's cycles

@article{Meehan2003ExtinctionAR,
  title={Extinction and re-evolution of similar adaptive types (ecomorphs) in Cenozoic North American ungulates and carnivores reflect van der Hammen's cycles},
  author={T. J. Meehan and L. D. Martin},
  journal={Naturwissenschaften},
  year={2003},
  volume={90},
  pages={131-135}
}
  • T. Meehan, L. Martin
  • Published 7 February 2003
  • Environmental Science, Geography
  • Naturwissenschaften
Numerous patterns in periodicity (e.g., climate, extinction, and sedimentary cycles) and evolutionary change (e.g., chronofaunas and coordinated stasis) have been described based on aspects of the geologic record. Recently, convergent occurrences of faunal types or "repeating faunas" have received attention, but a highly specific, iterative pattern was first reported over 40 years ago. In the late 1950s, van der Hammen described climatic/floral cycles on the order of six million years based on… 
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