RATES OF DINOSAUR BODY MASS EVOLUTION INDICATE 170 MILLION YEARS OF SUSTAINED ECOLOGICAL INNOVATION ON THE AVIAN STEM LINEAGE.

Rates of dinosaur body mass evolution indicate 170 million years of sustained ecological innovation on the avian stem lineage.

Large-scale adaptive radiations might explain the runaway success of a minority of extant vertebrate clades.This hypothesis predicts, among other things, rapid rates of morphological evolution during the early history of major groups, as lineages invade disparate ecological niches.However, few studies of adaptive radiation have included deep time d

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