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| Mitchell et al. argue that divergence- time estimates for our avian phylogeny were too young because of an " inappropriate" maximum age constraint for the most recent common ancestor of modern birds and that, as a result, most modern bird orders diverged before the Cretaceous- Paleogene mass extinction event 66 million years ago instead of after. However, their interpretations of the fossil record and timetrees are incorrect.
Because of an “inappropriate” maximum age constraint for the most recent common
ancestor of modern birds and that, as a result, most modern bird orders diverged before the
Cretaceous-Paleogene mass extinction event 66 million years ago instead of after. However,
their interpretations of the fossil record and timetrees are incorrect. | |
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