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stasigenesisStasigenese (ger.)

  • A stable phase of evolution, characterized by a lack of significant change over a long period of time. (OED 2012)
    progress
    1957
    I therefore propose the term stasigenesis to cover all processes leading to stabilization and persistence of types and of patterns of organization, from species up to phyla.
    Huxley, J. (1957). The three types of evolutionary process. Nature 180, 454-455: 454.
    1982

    stasigenesis The persistence of a form or group showing little change over an extended period of time, irrespective of changing environmental conditions; the tendency to form well integrated gene pools with well-adapted phenotypic products persisting under the influence of stabilizing selection q. v.; cf. anagenesis, catagenesis.

    Lincoln, R.J., Boxshall, G.A. & Clark, P.F. (1982). A Dictionary of Ecology, Evolution and Systematics: 234.