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Collared Flat-backed Millipede

Polydesmus collaris


This millipede has markings similar to the markings of the cyanide millipede, and similiarities to the Flat Backed Millipede because of the obvious, long legs that would otherwise mark it for a centipede. Another centipedal charactaristic - this millipede glided across the ground so quickly that it was hard to get worthwhile picture.


The cold, foggy top of Volcan Mombacho in the tropical region of Nicaragua. The part of trail this millipede was on was rock, with a lot of wet, decomposing leaf matter on top.

3 species ID suggestions

Yellow-Spotted Millipede
Harpaphe haydeniana Harpaphe haydeniana
Flat Backed Millipede
injica 6 years ago
Polydesmus collaris


Stuart4 a year ago

There are LOTS of different millipedes like this, genus Amplinus seems common in Central America. More likely i suggest than jumping on a name of those known from USA.

aw haha.. overlooked that it's also called cyanide millepede. my bad. i actually had the same spotting added earlier that's why I just suggested right away ;-)

Curator of Good
Curator of Good 6 years ago

@Cherrey - I've seen many of these Cyanide Millipedes back home in Oregon, and this one looked a lot like it (that's why I already cited the Cyanide in the description) but Nicaragua is just too far out of the Cyanide area.

Curator of Good
Curator of Good 6 years ago

Thanks for the tip Juan. Just off the long legs I'd figured it had to be a centipede, but it looks so much like the Flat Backed - that's just too far out of its range. Turns out there's another, similar family of millipede from Nicaragua to Panama.

Granada, Granada, Nicaragua

Lat: 11.83, Long: -85.97

Spotted on Jul 12, 2011
Submitted on Nov 16, 2011

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