Saltacionizam (od lat.saltus: skok), u biologiji iznenadna promjena od jedne do druge generacije koja je velika, ili veoma velika, u usporedbi s običnom varijacijom nekog organizma. Termin se rabi za nestupnjevite promjene (navlastito u jednokoračnoj specijaciji) koje su atipične ili krše gradualizam obuhvaćen modernom evolucijskom teorijom.
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Ulrich Kutschera, Karl J. Niklas. (2008). Macroevolution via secondary endosymbiosis: a Neo-Goldschmidtian view of unicellular hopeful monsters and Darwin's primordial intermediate form. Theory in Biosciences 127: 277-289.
David J. Merrell. (1994). The Adaptive Seascape: The Mechanism of Evolution. University of Minnesota Press. ISBN978-0816623488