ArticleBMC evolutionary biology2019
Repeated evolution of asymmetric genitalia and right-sided mating behavior in the Drosophila nannoptera species group.
Article in BMC evolutionary biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Two matings lead to more copulatory wounding than a single mating in femaleProceedings. Biological sciences · 2025Article
- Piezo-mediated mechanosensation contributes to stabilizing copulation posture and reproductive success iniScience · 2023Article
- Asymmetry of the male internal reproductive organs in Mantophasmatodea.BMC zoology · 2022Article
- No evidence for asymmetric sperm deposition in a species with asymmetric male genitalia.PeerJ · 2022Article
- Male genital lobe morphology affects the chance to copulate in Drosophila pachea.BMC ecology and evolution · 2021Article
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5 authors.
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Abstract
backgroundMale genitals have repeatedly evolved left-right asymmetries, and the causes of such evolution remain unclear. The Drosophila nannoptera group contains four species, among which three exhibit left-right asymmetries of distinct genital organs. In the most studied species, Drosophila pachea, males display asymmetric genital lobes and they mate right-sided on top of the female. Copulation position of the other species is unknown.
resultsTo assess whether the evolution of genital asymmetry could be linked to the evolution of one-sided mating, we examined phallus morphology and copulation position in D. pachea and closely related species. The phallus was found to be symmetric in all investigated species except D. pachea, which displays an asymmetric phallus with a right-sided gonopore, and D. acanthoptera, which harbors an asymmetrically bent phallus. In all examined species, males were found to position themselves symmetrically on top of the female, except in D. pachea and D. nannoptera, where males mated right-sided, in distinctive, species-specific positions. In addition, the copulation duration was found to be increased in the nannoptera group species compared to closely related outgroup species.
conclusionOur study shows that gains, and possibly losses, of asymmetry in genital morphology and mating position have evolved repeatedly in the nannoptera group. Current data does not allow us to conclude whether genital asymmetry has evolved in response to changes in mating position, or vice versa.
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