Abstract

The genera Ochrogramma Gardner and Shelley, 1989 and Vasingtona Chamberlin, 1941 (Dip¬lopoda: Chordeumatida: Striariidea: Caseyidae) are assigned to the Ochrogrammatinae Shear and Marek, new subfamily. The new subfamily is diagnosed by the broad ventral lamina of the mandibular stipes and extremely long gonapophyses (found in males), the peculiar, elaborately branched processes of the gonopods, and other characters. New records and new SEM illustrations are provided for the species Vasingtona irritans (Chamberlin, 1910), Ochrogramma bentona (Chamberlin, 1952) and Ochrogramma haigi Gardner and Shel¬ley, 1989. The range of O. bentona is extended north from the Columbia River to the Puget Sound region. We describe Ochrogramma skamania Shear and Marek, new species, which is the second species of its genus from north of the Columbia River. We also document for the first time spermatophore material on the coxae of legpair 10, the gonopods and the female vulvae, and thus provide evidence that a spermatophore is formed in the coxal glands of legpair 10, picked up by the gonopods and thence transferred to the female receptacles. The spermatozoa of Nematophora, heretofore undescribed, appear to be subglobular, about 14.0–14.5 μm in diameter, nonmotile and embedded in a secretion.

References

• Chamberlin RV. 1910. Diplopoda from the western states. Annals of the Entomological Society of America 3: 30–43. 
• Chamberlin RV. 1925. Notes on some centipeds and millipeds from Utah. Pan-Pacific Entomologist 4: 55–63. 
• Chamberlin RV. 1941a. New American millipeds. Bulletin of the University of Utah, 31, Biological Series 6(4): 1–29. 
• Chamberlin RV. 1941b. New western millipeds. Bulletin of the University of Utah, 31, Biological Series 6(5): 1–36. 
• Chamberlin RV. 1951. Eleven new western millipeds. Chicago Academy of Sciences Natural History Miscellanea 87: 1–12. 
• Cook OF, Collins GN. 1895. The Craspedosomatidae of North America. Annals of the New York Academy of Science 9: 1–100. 
• Gardner MR, Shelley RM. 1989. New records, species and genera of caseyid millipeds from the Pacific Coast of North America (Diplopoda: Chordeumatida: Caseyidae). Pan-Pacific Entomologist 65: 177–268. 
• Golovatch SI. 1980. New forms of Diplopoda from the Soviet Far East and their zoological relationships. Zoolgicheskii Zhurnal 59: 199–207. 
• Harger O. 1872. Descriptions of new North American myriapods. American Journal of Science and Arts 4: 117–121. 
• Hoffman RL. 1979. Classification of the Diplopoda. Museum d’Histoire Naturelle; Geneva, Switzerland. 237 p. 
• Hoffman RL. 1999. Checklist of the millipeds of North and Middle America. Virginia Museum of Natural History Special Publication 8: 1–584. 
• Mathews PL, Bultman TL. 1993. Mating behavior of a parajulid millipede, Aniulus bollmani .Canadian Journal of Zoology 71: 2297–2300. 
• Minelli A, Michalik P. 2015. Diplopoda–Reproduction. p. 237–265. In: Minelli A (ed.). Treatise on zoology - anatomy, taxonomy, biology. The Myriapoda, vol. 2. Brill; Leiden, the Netherlands. 482 pp 
• Shear WA. 2003. The milliped family Trichopetalidae, Part 1: Introduction and genera Trigenotyla Causey, Nannopetalum, n. gen., and Causeyella, n. gen. (Diplopoda:Chordeumatida: Cleidogonoidea). Zootaxa 321: 1–36. 
• Shear WA. 2011. Cave millipeds of the United States. XI. Opiona groeningi, n. sp., a troglomorphic caseyid milliped from Siskyou County, California, with comments on the genus Opiona Chamberlin 1951. (Diplopoda, Chordeumatida, Caseyidae). Zootaxa 3114: 50–56. 
• Shear WA. 2021. Additions to the millipede family Caseyidae. II. Martenseya, a new genus of miniature, blind millipedes from California. (Diplopoda, Chordeumatida, Caseyidae). Zootaxa 4984: 108–113. 
• Shear WA, Crawford RL. 2019. Cave millipedes of the United States. XVI. Two new species from Oregon Caves National Monument, Oregon (Diplopoda, Chordeumatida, Caseyidae). Zootaxa 4674: 57–580. 
• Shear WA, Leonard WP. 2007. Additions to the milliped family Caseyidae. I. Caseya richarti, n. sp., and new records of previously described species in the genus Caseya Cook and Collins 1895 (Diplopoda, Chordeumatida, Caseyidae). Zootaxa 1524: 23–34. 
• Shelley RM. 1993. The milliped genus Underwoodia (Chordeumatida: Caseyidae). Canadian Journal of Zoology 71: 168–176.