Data from: An innovative ovipositor for niche exploitation impacts genital coevolution between sexes in a fruit-damaging drosophila
Data files
Sep 05, 2018 version files 25.68 GB
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Paramere images.zip
851 MB
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READ ME.txt
1.54 KB
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Video images of copulating Dsub_H243_disruptedxDsub_H243.zip
1.89 GB
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Video images of copulating Dsub_H243-1.zip
4.70 GB
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Video images of copulating Dsub_H243-2.zip
4.57 GB
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Video images of copulating Dsub_H243-3.zip
2.34 GB
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Video images of copulating Dsub_H243xDsuz_TMUS8.zip
588.77 MB
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Video images of copulating Dsuz_TMUS8_disruptedxDsuz_TMUS8.zip
3.02 GB
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Video images of copulating Dsuz_TMUS8-1.zip
3.28 GB
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Video images of copulating Dsuz_TMUS8-2.zip
4.07 GB
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Video images of copulating Dsuz_TMUS8-3.zip
358.51 MB
Abstract
Limited attention has been given to ecological factors influencing the coevolution of male and female genitalia. The innovative ovipositor of Drosophila suzukii, an invading fruit pest, represents an appealing case to document this phenomenon. The serrated saw-like ovipositor is used to pierce the hard skin of ripening fruits that are not used by other fruit flies that prefer soft decaying fruits. Here, we highlight another function of the ovipositor related to its involvement in genital coupling during copulation. We compared the morphology and coupling of male and female genitalia in this species to its sibling species, D. subpulchrella, and to an outgroup species, D. biarmipes. These comparisons and a surgical manipulation indicated that the shape of male genitalia in D. suzukii has had to be adjusted to ensure tight coupling, despite having to abandon the use of a hook-like structure, paramere, because of the more linearly elongated ovipositor. This phenomenon demonstrates that ecological niche exploitation can directly affect the mechanics of genital coupling, and potentially cause incompatibility among divergent forms. This model case provides new insights towards elucidating the importance of the dual functions of ovipositors in other insect species that potentially induce genital coevolution and ecological speciation.