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Centipede found in human stool

Centipede found in human stool
San carlos, San mateo County, California, USA
December 22, 2014

Moved from Centipedes.

It's definitely a Geophilid .
It's definitely a Geophilid ... looks like Arctogeophilus to me but no way to be sure. If you still have the specimen, I'd love to see it, then I could tell you what species it is.

I have no idea how this happened but I can say the centipede definitely wasn't a parasite. Was it dead or alive when it was found?

Dissection of prosternum
When you identify your Geophilomorphs, must you dissect their head and mouthparts in order to see their mandibles more clearly? Is that the defining characteristic to get them to Family, at least?

Moved from ID Request.

Based on my googling
it looks like a soil centipede, which just might sometimes be parasitic in humans, according to a couple of entries at

The soil centipede can be parasitic to humans? That sounds almost unbelievable! Freaky. Gotta research that one.

They are not parasitic. If they end up in people it's by accident ... don't know how it happens but apparently it does. My suspicion is that someone sits on a centipede and it freaks out and finds the nearest dark, warm place to hide.

Still creepy, but no known centipedes are parasitic. This particular centipede is, like most others, a predator of soil-dwelling invertebrates.

Um... that description requires an explanation story!!!!

100% agree!
100% agree!

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