original description(ofSigmoria furcifera Hoffman, 1949)Hoffman, R. L. (1949). Nine new xystodesmid millipeds from Virginia and West Virginia, with records of established species. Proceedings of the United States National Museum, 99(3244): 371-389 page(s): 388 [details]
original description(ofSigmoria aberrans Chamberlin, 1939)Chamberlin, R. V. (1939). On some diplopods of the family Fontariidae. Bulletin of the University of Utha, Biological Series, 30(2): 1-19. Salt Lake City page(s): 8 [details]
original description(ofSigmoria conclusa Chamberlin, 1939)Chamberlin, R. V. (1939). On some diplopods of the family Fontariidae. Bulletin of the University of Utha, Biological Series, 30(2): 1-19. Salt Lake City page(s): 8 [details]