Sanakirja.org

In evolutionary biology, one who believes in saltationism.

Painting of Hugo de Vries, making a painting of an evening primrose, the plant which had apparently produced new forms by large mutations in his experiments, by Thérèse Schwartze, 1918

In evolutionary biology, one who believes in saltationism.

Étienne Geoffroy Saint-Hilaire believed that "monstrosities" could immediately found new species in a single large jump or saltation.

In evolutionary biology, one who believes in saltationism.

Rudolph Albert von Kölliker revived Geoffroy's saltationist ideas, calling his theory heterogenesis. It depended on a nonmaterial directive force (orthogenesis).