The gradual decline of the dinosaurs—fact or fallacy?

@article{Russell1984TheGD,
  title={The gradual decline of the dinosaurs—fact or fallacy?},
  author={D. Russell},
  journal={Nature},
  year={1984},
  volume={307},
  pages={360-361}
}
Both great dinosaurian orders (Saurischia and Ornithischia) were major components of terrestrial vertebrate faunas for ∼150 Myr. The prevailing view is that dinosaurs attained an evolutionary acme late in the Cretaceous, after which they gradually declined in taxonomic diversity over ∼10 Myr to their extinction 63 Myr ago1–6. The postulated decline is usually supported by comparing diversity levels in 76 Myr-old and 64 Myr-old dinosaurian assemblages from North America. The resulting… Expand
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