[maps] Warning! The maps are automatically generated from the textual information, and the process does not always produce acceptable result; See about maps for more info.
Some related literature:
[NAML]; Chamberlin & Hoffman, 1958
Checklist of the Millipeds of the North America
U.S. Nat. Mus. Bull. 212
Diplopoda from the western states
Ann. Ent. Soc. Amer., 3 (4): 233-262, pls. 30-43
Seven new American millipeds
Proc. Biol. Soc. Washington, 60: 9-16, f. 1-8
Some millipeds of the families Polydesmidae and Xystodesmidae
Journ. Washington Acad. Sci., 39 (3): 94-102, f. 1-27
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Keep in mind that the taxonomic information is copied from various sources, and may include many inaccuracies. Expert help is welcome.