[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
Notes on North American Julidae, with descriptions of new species
Ann. N.Y. Acad. Sci. 4 (1-2): 25-44
I Diplopodi. Parte I, Sistematica
Ann. Mus. Civ. Stor. Nat. Genova, 36 (ser. 2, vol. 16): 121-254, f. 1-26
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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.