Opiona Chamberlin 1951

• Main Authors: Shear, William A., Crawford, Rodney L.
• Format: Text
• Language: unknown
• Published: Zenodo 2019
• Subjects: Biodiversity; Taxonomy; Animalia; Arthropoda; Diplopoda; Chordeumatida; Caseyidae; Opiona; Canada; Pacific; British Columbia; Gardner; Queen Charlotte; Crawford; Archipelago; Alaska
• Online Access: https://dx.doi.org/10.5281/zenodo.5940779; https://zenodo.org/record/5940779

Genus Opiona Chamberlin, 1951 Type species: Opiona columbiana Chamberlin, 1951. The most recent revision is Gardner & Shelley (1989); Shear (2011) adds one more species. Opiona presently includes 14 species and is distributed from central California to the Alexander Archipelago, Alaska (Gardner & Shelley 1989, Shelley et al. 2007). The single previously described troglomorphic species is Opiona graeningi from caves in the Marble Mountains, Siskiyou Co., California (Shear 2011). Numerous additional surface-dwelling species of Opiona await description and naming. Opiona is best distinguished from other sympatric caseyid genera by the characteristic modification of the third leg, in which the telopodite arises distal to the midpoint of the elongated coxa and has a strongly inflated prefemur (Figs. 9, 10). : Published as part of Shear, William A. & Crawford, Rodney L., 2019, Cave millipedes of the United States. XVI. Two new species from Oregon Caves National Monument, Oregon (Chordeumatida, Conotylidae and Caseyidae), pp. 571-580 in Zootaxa 4674 (5) on page 575, DOI: 10.11646/zootaxa.4674.5.6, http://zenodo.org/record/3465101 : {"references": ["Gardner, M. R. & Shelley, R. M. (1989) New records, species, and genera of caseyid millipeds from the Pacific Coast of North America (Diplopoda: Choreumatida: Caseyidae). Pan-Pacific Entomologist, 65, 177 - 268.", "Shelley, R. M., Shear, W. A., Leonard, W. P. & Ovaska, K. (2007) Diplopoda, Chordeumatida, Caseyidae, Opiona columbiana Chamberlin, 1951: Distribution extensions into the Alexander Archipelago, Alaska, USA, Queen Charlotte Islands, British Columbia, Canada, and eastern & southern Washington State, USA; additional new records from British Columbia and Washington. Check List, 3, 14 - 17. https: // doi. org / 10.15560 / 3.1.14"]}