Entomologists: Weevil Beetles Grow Spiked Penises

Love 2023
Entomologists: Weevil Beetles Grow Spiked Penises
Entomologists: Weevil Beetles Grow Spiked Penises

Video: Entomologists: Weevil Beetles Grow Spiked Penises

Отличия серверных жестких дисков от десктопных
Video: 10 Harmful Bugs to Avoid at all Costs! 2023, February
Anonim

The penises of caryopses are covered with hundreds of sharp spines, entomologists have discovered. This feature turns copulation into a traumatic and painful process for females. The study was published in the journal Proceedings of the Royal Society B.

Image
Image

In photographs taken with a microscope, it can be seen that the male's penis resembles a spiked mace. Spines pierce the reproductive organs of females during mating. However, laboratory observations of hundreds of generations of beetles have shown that the evolution of the genitals of males and females looks like an arms race. As the male genitals become more traumatic, the female genitals adapt to the damage. So, during the observation period, the tissues of the reproductive tract of females became denser, because of which the thorns pierced them less often.

As biologists suggest, males need such "armed" genitals so that females do not mate with anyone after them. However, this does not help much - females still copulate with other males. Therefore, another theory was put forward - probably, this feature allows them to fertilize more eggs compared to competitors. It is also possible that the deeper holes left by the thorns facilitate the entry of substances that influence her behavior into the female's body.

Popular by topic