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Sigmoria Timaculata? - Sigmoria trimaculata

Sigmoria Timaculata? - Sigmoria trimaculata
October Mountain State Forest/Washingtom, Berkshire County, Massachusetts, USA
May 11, 2015
I know that there are two species of the family Xystodesmidae in the Berkshire. Sigmoria Trimaculata and Apheloria virginiensis corrugata. If that statement is incorrect, please correct me. I have also seen some comments in regards to a wrinkled surface possibly implying a species of Cherokia which wouldn't shouldn't be in this area. I would be interested in debunking or proving that it is or is not present in Western Mass. If it, by chance, turned out that it is, I have theories around the Appalachian Trail going through the Berkshires. However, i am not familiar with the differences in gonopods, if someone would be kind enough to enlighten me what to look for in the differences of the gonopods I would be grateful. I am including two photographs of the gonopod for this specimen. If they do not aid in the identification let me know and I will delete them. They are not the clearest pictures but I will keep trying.

Moved from Millipedes.

Moved for expert attention
Moved from ID Request.

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