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Sexual coevolution in the traumatically inseminating plant bug genus Coridromius
1Evolution & Ecology Research Centre, University of New South Wales, Sydney, Australia. n.tatarnic@unsw.edu.au
Journal of Evolutionary Biology
|May 12, 2010
Summary
Sexual conflict drives genital evolution in insects. In plant bugs, female paragenitalia and male genital shapes coevolved, supporting an evolutionary arms race.
Area of Science:
- Evolutionary biology
- Sexual selection
- Animal behavior
Background:
- Sexual conflict can drive rapid diversification of reproductive traits.
- Traumatic insemination in insects involves males harming females, leading to counter-adaptations.
- The evolution of genitalia is debated, with some questioning the role of sexual conflict due to perceived lack of variation.
Purpose of the Study:
- To investigate the role of sexual conflict in the evolution of genitalia.
- To test for evidence of a coevolutionary arms race in traumatically inseminating insects.
- To examine the diversification of female paragenitalia and male genital morphology in the plant bug genus Coridromius.
Main Methods:
- Phylogenetic analysis of the plant bug genus Coridromius.
- Comparative analysis of male and female genital morphology.
- Correlation analysis between female paragenitalia and male genital shape evolution.
Main Results:
- Female paragenitalia have evolved independently multiple times within the genus Coridromius.
- Changes in female paragenitalia are correlated with changes in male genital shape.
- These patterns support the hypothesis of sexually antagonistic coevolution.
Conclusions:
- The study provides strong evidence for an evolutionary arms race driven by sexual conflict in Coridromius plant bugs.
- Diversification of genitalia in this genus is shaped by antagonistic interactions between sexes.
- This research contributes to understanding the mechanisms of reproductive trait evolution.
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