(ofSpirobolus uncigerus Wood, 1864)Wood, H. C. (1864). Descriptions of new species of North American Iulidae. Proceedings of the Academy of natural Science of Philadelphia, 1864: 10-15 page(s): 15 [details]
original description(ofCalifornibolus oregonus Chamberlin, 1949)Chamberlin, R. V. (1949). On some western millipeds of the order Spirobolida. Journal of the Washington Academy of Sciences. 39: 163-169. page(s): 166 [details]
original description(ofCalifornibolus pontis Chamberlin, 1949)Chamberlin, R. V. (1949). On some western millipeds of the order Spirobolida. Journal of the Washington Academy of Sciences. 39: 163-169. page(s): 166 [details]
original description(ofCalifornibolus rectus Chamberlin, 1949)Chamberlin, R. V. (1949). On some western millipeds of the order Spirobolida. Journal of the Washington Academy of Sciences. 39: 163-169. page(s): 166 [details]
original description(ofSpirobolus uncigerus Wood, 1864)Wood, H. C. (1864). Descriptions of new species of North American Iulidae. Proceedings of the Academy of natural Science of Philadelphia, 1864: 10-15 page(s): 15 [details]
additional sourceShelley, R. M.; Bauer, S. B. (1997). Distribution of the milliped Tylobolus utahensis Chamberlin, with remarks on T. fredericksoni (Causey) (Spirobolida: Spirobolidae). Great Basin Naturalist, 57(3): 231-237[details]
source of synonymyHoffman, R. L. (1999). Checklist of the millipedes of North and Middle America. Virginia Museum of Natural History, special publication. 8: 1-584. page(s): 44 [details]