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Genital divergence in sympatric sister snails.

  • Johan Hollander
  • C M Smadja
  • R K Butlin
  • D G Reid
Publishing year: 2013
Language: English
Pages: 210-215
Publication/Series: Journal of evolutionary biology
Volume: 26
Issue: 1
Document type: Journal article
Publisher: John Wiley and Sons Inc.

Abstract english

A pattern of greater divergence in mating traits between sister-species pairs with overlapping ranges than between allopatric species pairs is expected if reinforcement commonly contributes to speciation. Few large-scale comparative analyses have addressed this prediction, especially for genital form. Here, we show that penial morphology follows the predicted pattern in 40 robustly identified sister-species pairs in the marine gastropod subfamily Littorininae. Further work is needed to exclude other processes that may contribute to genital divergence between sympatric species, but the clear pattern we observe strongly suggests a role for genital form in reproductive isolation in this large clade.


  • Ecology
  • Littorinidae
  • morphology
  • phylogeny
  • reinforcement
  • reproductive character displacement
  • speciation


  • ISSN: 1420-9101
Johan Hollander
E-mail: johan [dot] hollander [at] biol [dot] lu [dot] se


Division aquatic ecology

+46 46 222 34 73


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Aquatic Ecology