Friday, December 21, 2018

Female penises evolved twice in bark lice

In a group of bark lice, a penis has evolved twice -- in the females. In their nutrient-scarce environment, 'seminal gifts' are an incentive for females to force mating, leading to the co-evolution of female penises and male vaginas.

from Latest Science News -- ScienceDaily http://bit.ly/2BC4dCG
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