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): 222 [details]
Sierwald, P.; Decker, P.; Spelda, J. (2024). MilliBase. Metopiona Gardner & Shelley, 1989. Accessed at: https://www.millibase.org/aphia.php?p=taxdetails&id=892029 on 2024-11-15
original descriptionGardner, 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): 222 [details]