Dictionary of Human Evolution and Biology

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Parallel Evolution

1. changes that continue along similar lines in related taxa that have become separated but that remain exposed to similar selective pressures; for example, New World monkeys and Old World monkeys have been separated for at least 26 my, yet have both evolved clearly as monkeys; see parallelism.

2. as used by some workers, independent evolution of similar morphological features in separate lineages due to a similarity of selection pressures; convergence.

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