punctuated equilibrium

A Dictionary of Zoology | Date: 1999

punctuated equilibrium The theory, first proposed in 1972 by Niles Eldredge and Stephen Jay Gould, that evolution is characterized by geologically long periods of stability during which little speciation occurs, punctuated by short periods of rapid change, species undergoing most of their morphological changes shortly after breaking from their parent species.


© A Dictionary of Zoology 1999, originally published by Oxford University Press 1999.

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