• Corpus ID: 219117623

Punctuated Equilibrium At Twenty: A Paleontological Perspective

  title={Punctuated Equilibrium At Twenty: A Paleontological Perspective},
  author={Jim Lippard},
From Skeptic vol. 1, no. 3, Fall 1992, pp. 38-47. The following article is copyright (c) 1992 by the Skeptics Society, 2761 N. Marengo Av e., Altadena, CA 91001, (818) 794-3119. Permission has been granted for noncommercial electronic circulation of this articles in its entirety, including this notice. For information about a special Internet introductory subscription rate, see the file subscription-rates or contact Jim Lippard (lippard@rtd.com). 


Punctuated equilibria: an alternative to phyletic gradualism
Editorial introduction. Moving from populations to species. we recall that the process of speciation as seen through the hyperopic eyes of the paleontologist is an old and venerable theme. But the
Punctuated versus Gradual Mode of Evolution
The attractiveness of punctuationalism is first of all due to its far-reaching implications for the study of macroevolution, since dismissal of the old gradualistic concept forces us to invoke some new biologic principles and/or mechanisms to account for Macroevolutionary change.
STASIS IN PROGRESS: The Empirical Basis of Macroevolution
The theory and practice of macroevolutionary study have moved from the seat of the pants, to the back of an envelope, to the printed page. In the course of this journey, important ideas have surfaced
The spandrels of San Marco and the Panglossian paradigm: a critique of the adaptationist programme
  • S. Gould, R. Lewontin
  • Biology
    Proceedings of the Royal Society of London. Series B. Biological Sciences
  • 1979
The adaptationist programme is faulted for its failure to distinguish current utility from reasons for origin, and Darwin’s own pluralistic approach to identifying the agents of evolutionary change is supported.
The promise of paleobiology as a nomothetic, evolutionary discipline'
The formulation, by paleobiologists and with paleobiological data, of new macroevolutionary theories should end the subservience of passive transfer and contribute to the formulation of a new, general theory of evolution that recognizes hierarchy and permits a set of unifying principles to work differently at various levels.
The paradox of the first tier; an agenda for paleobiology
It is proposed that the authors consider distinct processes at three separable tiers of time: ecological moments, normal geological time (trends during millions of years), and periodic mass extinctions.
The empirical case for the punctuational model of evolution
The neo-Darwinian synthesis that resulted from the integration of Mendelian genetics into evolutionary theory has dominated evolutionary biology for the last 30 to 40 years, due largely to its
Species Selection As a Causal Process
The idea that evolutionary trends may involve a process of sorting among species was recognized by Eldredge and Gould (1972) as an outgrowth of their model of punctuated equilibria and Stanley (1975, 1979) expanded upon this general theme in proposing his concept of species selection.