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- W2472912209 abstract "Mammalian penises are morphologically diverse, including a highly variable and taxonomically informative baculum (os penis), and variable penile spines, both of which are possessed by many-but not all-species. To understand the evolution of genital morphologies, as well as the potential role of both the baculum, and penile spines that directly interact with female reproductive tract, we undertook a comparative study of male penile spines and their relationship with the baculum across all mammalian orders. Specifically, we investigated several factors that may explain the presence or absence of penile spines in mammals, including mating system, risk of sperm competition, female reproductive physiology, presence and width of the baculum, and phylogenetic history. We observed that the presence of both the baculum and penile spines is correlated with residual testes size, suggesting a potential role in sexual selection for these traits. We found no association between the presence of spines and mating system, or with the presence/width of the baculum, although relative testes mass was marginally associated with baculum width. We found no relationship between baculum presence or width and mating system. We also noted that spines presence or absence have an order-level distribution, and clear phylogenetic patterns of distribution across mammals. It is likely that spine morphology and distribution, not just presence, play an important role in genital evolution in mammals, but these features are poorly described in most groups. Quantitative data collection in most mammalian taxa would be useful to further elucidate the evolution of the complex genital morphology of this group." @default.
- W2472912209 created "2016-07-22" @default.
- W2472912209 creator A5010693718 @default.
- W2472912209 creator A5031950979 @default.
- W2472912209 date "2016-07-01" @default.
- W2472912209 modified "2023-10-18" @default.
- W2472912209 title "All Features Great and Small—the Potential Roles of the Baculum and Penile Spines in Mammals" @default.
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- W2472912209 doi "https://doi.org/10.1093/icb/icw057" @default.
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- W2472912209 hasPublicationYear "2016" @default.
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