Rusty Millipedes mating

I saw this pair of rusty millipedes mating on a dirt road. The male is on top and can be identified by a gap in his legs at his seventh body segment. The legs have been replaces by gonopods, the male’s sexual organ which he uses to transfer sperm to the female. The sperm comes from gonopores which are located in the third segment of the body, and it must be moved to the gonopods before mating.

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