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Giant Flat-backed Millipede

Polydesmus sp.?


about 4" long and ¾" wide, this lively flat millipede was a light gray with a black stripe down the center of its back bordered by light-gray stripes. It curled into a tight coil when picked up, and I noticed that at the bases of its legs it had a collection of small tan mites, each about 1mm across.


It was creeping along in the leaf litter near a stream in humid rain forest along the north bank of the Amazon River


These guys are vegetarians, so there's no fear they'll bite. Two legs per segment means they're millipedes, One leg per segment is a centipede and should be handled carefully. When they walk the row of legs ripples as though a wave were passing through. So cool! Several different millipedes share this common name, so if you know what genus and species it is, please tell me.

No species ID suggestions


armadeus.4 2 years ago

I'm with you on that one! I love being able to share as much as I love being able to learn :)

Irene Brady
Irene Brady 2 years ago

LOL, I can't imagine not putting information in all the fields if I know or find out something interesting about it.....;o}

armadeus.4 2 years ago

Great shots Irene! Thank you for the information and for sharing :)

Loreto, Peru

Lat: -3.52, Long: -72.34

Spotted on Dec 29, 2010
Submitted on Jan 29, 2016

Related spottings

Flat-backed Millipede Flat-backed millipede Flat-backed Millipede Flat-backed Millipede

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Atta Ant, Leafcutter Ant Crested Forest Toad, South American Common Toad Spix's Guan Boa Constrictor, Red-tailed Boa