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Journal Article

The Uniquely Evolved Character Concept and its Cladistic Application

Walter J. Le Quesne
Systematic Zoology
Vol. 23, No. 4 (Dec., 1974), pp. 513-517
DOI: 10.2307/2412469
Stable URL: http://www.jstor.org/stable/2412469
Page Count: 5

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Topics: Cladistics, Psychism, Statistical distributions, Standard deviation
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The Uniquely Evolved Character Concept and its Cladistic Application
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Abstract

A new concept based on Dollo's Law, the uniquely evolved character concept, is defined; it can be applied only to characters involving evolution of a structural character or development of a new enzymatic pathway. From this, a new method of trying to establish cladistic relationships has been developed and studied with the same published data on taxa of orthopteroid insects as used in my earlier paper (Le Quesne, 1972).

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