Macroevolutionary trends in the Dinosauria: Cope's rule.

  title={Macroevolutionary trends in the Dinosauria: Cope's rule.},
  author={David W E Hone and T M Keesey and Davide Pisani and Andy Purvis},
  journal={Journal of evolutionary biology},
  volume={18 3},
Cope's rule is the tendency for body size to increase over time along a lineage. A set of 65 phylogenetically independent comparisons, between earlier and later genera, show that Cope's rule applied in dinosaurs: later genera were on average about 25% longer than the related earlier genera to which they were compared. The tendency for size to increase was not restricted to a particular clade within the group, nor to a particular time within its history. Small lineages were more likely to… CONTINUE READING
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