Mosaic Evolution

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mosaic evolution

[mō¦zā·ik ‚ev·ə′lü·shən]
The tendency of one or more characters to undergo evolutionary change at different rates than other characters in a lineage.

Mosaic Evolution


a form of evolution in which the organs and parts of an organism’s body develop independently and unevenly: some develop rapidly, others develop slowly, and others remain unchanged for a long time. The term “mosaic evolution” was proposed by the British scientist G. De Beer in 1954. The result of mosaic evolution is a varying degree of development and specialization of different organs—heterobathism. Mosaic evolution characterizes the development of specialized forms in which both primitive and advanced features are observed. To some extent, mosaic evolution is characteristic of organisms of any group.

References in periodicals archive ?
4) A detailed analysis of the evolution of both the enaniornithines and the omithurines after the Archaeopteryx stage of avian evolution is needed to determine whether a pattern of mosaic evolution exists in both groups.
Not only did de Beer publish a wonderful monograph on the London specimen (1954, Archaeopteryx lithographica, British Museum, London, UK), but he used his analysis to postulate the important concept of mosaic evolution (1964, Advancement of Science 42:1-11) which is central to understanding macroevolutionary changes.
above) about hominin taxonomy and because of the complexity of reconstructing mosaic evolution.
Mosaic evolution of the severe acute respiratory syndrome coronavirus.
What appears to be going on is mosaic evolution," Bromage observes.
Kathleen Gibson argues that cultural aspects of behaviour, like cognition and language, surely evolved slowly and in mosaic fashion after a similar slow, mosaic evolution had resulted in the biocultural brain, an organ capable of culture as we know it.