original description
Chamberlin, R. V. (1910). Diplopoda from the western states. <em>Annals of the Entomological Society of America.</em> 3:233–262., available online at https://www.biodiversitylibrary.org/page/10181143
page(s): 246 [details]
additional source
Shear, William Albert; Reddell, James M. (2017). Cave millipedes of the United States. XIV. Revalidation of the genus Speorthus Chamberlin, 1952 (Diplopoda, Polydesmida, Macrosternodesmidae), with a description of a new species from Texas and remarks on the families Polydesmidae and Macrosternodesmidae in North America. Insecta Mundi, 0529: 1-13
page(s): 6; note: Listed in subfamily Nearctodesminae [details]
additional source
Hoffman, R. L. (1999). Checklist of the millipedes of North and Middle America. <em>Virginia Museum of Natural History, special publication.</em> 8: 1-584., available online at https://www.biodiversitylibrary.org/page/63590410 [details]
additional source
Shelley, R. M. (1994). The milliped family Nearctodesmidae in northwestern North America, with accounts of Sakophallus and S. simplex Chamberlin (Polydesmida). Canadian Journal of Zoology, 72(3): 470-495 [details]
From editor or global species database