Article
Molecular evidence for the early divergence of placental mammals.
BioEssays : news and reviews in molecular, cellular and developmental biology - 1 Dec 1999
Easteal S
Abstract excerpt
Paleontological and molecular data suggest quite different patterns for the early evolution of placental mammals. Paleontological evidence indicates a radiation, with most of the extant orders diverging at approximately the same time, close to the Cretaceous-Tertiary boundary, 65 Myr ago. Molecular evidence suggests a branching pattern of evolution that started much earlier. Resolving this discrepancy requires a...
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