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Female genital dimorphism in a spider (Araneae: Pholcidae)

Published online by Cambridge University Press:  10 October 2001

Bernhard A. Huber  and
Abel Pérez González
Bernhard A. Huber
Affiliation:
Division of Invertebrate Zoology, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024, U.S.A.
Abel Pérez González
Affiliation:
Instituto de Ecología y Sistematica, Habana 8, Cuba
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Abstract

Discontinuous individual variation among members of the same sex, in the same life stage, within a population, is an important phenomenon for our understanding of more fundamental issues in evolutionary biology. One set of morphological characters is conspicuously rare in the literature on intrasexual polymorphisms: genitalia. In this paper we report the first case of female genital polymorphism, the first not only for spiders but apparently for animals in general. We argue that the overwhelming use of genitalia in species identification practiced by many invertebrate taxonomists presents a strong bias against discovering polymorphisms in genitalia. Further methodological and practical aspects of invertebrate taxonomy are discussed that, taken together, make the discovery of genital polymorphisms unlikely, no matter whether or not the phenomenon is rare.

Keywords

spidergenital dimorphism
Type
Research Article
Information
Journal of Zoology , Volume 255 , Issue 3 , November 2001 , pp. 301 - 304
Copyright
© 2001 The Zoological Society of London

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