original descriptionHumbert, A.; Saussure, H. L. F. de (1869). Myriopoda nova Americana. Revue et magasin de zoologie pure et appliquée, 2. Sér., 21: 149-159, available online athttps://biodiversitylibrary.org/page/44243203[details]
additional sourceBueno-Villegas, J.; Sierwald, P.; Bond, J. E. (2004). Diplopoda. In: Bousquets, J. L.; Morrone, J. J. (eds.): Biodiversidad, taxonomia y biogeografia de artropodos de Mexico, 569-599[details]
additional sourceShelley, R. M. (2008). Way Down South: The milliped family Parajulidae (Julida: Parajulini) in Mexico and Central America; first records from El Salvador and the Baja California Peninsula. Zootaxa, 1893: 1-37[details]
additional sourceMauriès, J.-P. (1972). Nouvelle description de Paraiulus olmecus Humbert et Saussure, 1869, espèce-type du genre Paraiulus (Diplopoda), conservée au Museum d'Histoire naturelle de Genève. Revue suisse de zoologie, 79: 159-165. Genève[details]
additional sourceHoffman, R. L. (1999). Checklist of the millipedes of North and Middle America. <em>Virginia Museum of Natural History, special publication.</em> 8: 1-584.[details]
additional sourceLoomis, H. F. (1971). Additions to the millipeds of Mexico (Myriapoda: Diplopoda). Anales del Instituto de Biología, Universidad Nacional Autónoma de México, Serie Zoología, 40: 49-54[details]