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Collegedale, Hamilton County, Tennessee, USA
November 14, 2005
What species is this one?

Moved and cropped.
Moved from Flat-backed Millipedes and cropped to enhance detail.

Hamilton Co., TN, millipede
This photo is one of two species: either it is another and different species of Sigmoria (definitely not S. l. latior [=S. aberrans]) or a species of the related genus Brachoria. It is not possible to discern them from a dorsal view photo like this. The species of Sigmoria and Brachoria that occur in this part of Tennessee typically have more of a blue band connecting the paranotal (lateral segmental expansions on the dorsa) marking than this individual exhibits.

Well, I can tell you it is one of the flat-backed millipedes, or polydesmid, but my understanding of millipede classification is so embryonic that I'm not sure if polydesmids are an order, a family, or some other level of classification:-) Its a start anyway. Great image!

Im looking in a book
And the closest match I can find is (Species) Sigmoria aberrans in the Order Polydesmida. Is that correct?

Order is correct.
The order would be correct, but you would probably have to key out the specimen to get a genus and species (family, too, for that matter).

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