Spider Bites Off Its Own Genitals After Sex

herennia multipuncta

In what just might be the most disturbing post-coital ritual on the planet, male ornamental tree trunk spiders (a.k.a. coin spiders) have a habit of biting off their own genitals.

While many types of spiders suffer damage to or even lose their palps — essentially, the spider’s penis — during sex, these spiders really, really, really want to make sure the things are gone. So whatever hasn’t been damaged during the act usually gets chewed off afterward.

Now, researchers may be closer to understanding why these arachnids are so eager to lose their genitals.

(Story continues after image of giant female coin spider.)

In a recent study, 60 male coin spiders were set up with 60 females. According to Science News, the researchers had to make sure the females, which are much larger, were well-fed beforehand. Otherwise, they might actually eat the males instead of mating with them.

Of the 60 couples, 32 eventually hooked up. Afterwards, nine males lost one palp and 23 lost both (yes, they have two), according to the website. Some damaged the palps during sex, and whatever was left was often chewed off within 24 hours.

Why?

There could be a couple of reasons —> Read More Here

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