On the Taxonomic Status of the Common Adder of the Partially Wooded Steppe of the Oka – Don Plain

A. S. Sokolov

Abstract


Morphological characters of the typical form of the common adder, Vipera berus, and its black form, so-called «Vipera nikolskii», distributed in the partially wooded steppe of the Oka – Don plain, were investigated. Taxonomic status of black form is discussed.

Keywords


Serpentes; Viperidae; Vipera berus; morphological characters; taxonomy

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References


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