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Some related literature:
[NAML]; Chamberlin & Hoffman, 1958
Checklist of the Millipeds of the North America
U.S. Nat. Mus. Bull. 212
Crested millipeds of the family Lysiopetalidae in North America, with descriptions of new genera and species
Proc. U.S. Nat. Mus., 84 (3006): 97-135, f. 16-18, pls. 3-4
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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.