original description
Chamberlin, R. V. (1951). Eleven new western millipeds. <em>Natural History Miscellanea.</em> 87: 1-12.
page(s): 8 [details]
original description
(of Opiona hatchi Causey, 1954) Causey, N. B. (1954). The millipeds collected in the Pacific Northwest by Dr. M. H. Hatch. Annals of the Entomological Society of America, 47(1): 81-86
page(s): 82 [details]
additional source
Gardner, M. R.; Shelley, R. M. (1989). New records, species and genera of Caseyid Millipeds from the Pacific Coast of North America (Diplopoda: Chordeumatida: Caseyidae). Pan-Pacific Entomologist, 65(2): 177-268. SanFrancisco
page(s): 215 [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
page(s): 262 [details]
source of synonymy
Jeekel, C. A. W. (1971). Nomenclator generum et familiarum Diplopodorum: A list of the genus and family-group names in the Class Diplopoda from the 10th edition of Linnaeus, 1758, to the end of 1957. Monografieen van de Nederlandse Entomologische Vereniging, 5: 1-412. Amsterdam, available online at https://nev.nl/wp-content/uploads/2020/11/Mono-05-Jeekel-1970-OCR.pdf
page(s): 73 [details]
From editor or global species database