Abstract
The oribatid mite genus Oribatella (Oribatellidae) includes 18 species known previously from North America. Herein, wedescribe 11 new Oribatella species from montane, subarctic, forest and prairie habitats in western North America: O. abmisp. nov., O. banksi sp. nov., O. ewingi sp. nov., O. heatherae sp. nov., O. manningensis sp. nov., O. maryae sp. nov., O.oregonensis sp. nov., O. parallelus sp. nov., O. pawnee sp. nov., O. sintranslamella and O. yukonensis sp. nov.Descriptions of two species (O. heatherae and O. pawnee) include some developmental instars. That of O. yukonensisincludes all instars; nymphs retain dorsocentral setae dm and dp, but the setal morphology changes between larva andnymphs. These immatures bear sclerotized areas on the hysterosoma. Adults of Oribatella oregonensis show distinctsexual dimorphism, with three notogastral setae arising from fused porose areas in the male. We provide new distributionrecords for Oribatella species previously known from North America, including O. arctica Thor, 1930, O. canadensisBehan-Pelletier and Eamer, 2010, O. jacoti Behan-Pelletier, 2011 and O. reticulatoides Hammer, 1955, and remark on O.anomola Grabowski, 1970. We clarify description of the octotaxic system and the interlamellar region in species ofOribatella and discuss variability in hysterosomal sclerotization and setation in immatures. Finally, we give a key to adults of the 29 species of Oribatella now known from North America.References
Atlas of Canada (2007) http://atlas.nrcan.gc.ca/auth/english/maps/environment/ecology/framework/terrestrialecozones
(Accessed June 2, 2012).
Balogh, J. & Balogh, P. (1988) Oribatid Mites of the Neotropical Region I. Akademiai Kiadó, Budapest. 335 pp.
Behan-Pelletier, V.M. (1993) Eremaeidae (Acari: Oribatida) of North America. Memoirs of the Entomological Society of Canada, Ottawa, Canada, 168, 1–193.
Behan-Pelletier, V.M. (2011) Oribatella (Acari, Oribatida, Oribatellidae) of eastern North America. Zootaxa, 2973, 1–56.
Behan-Pelletier, V.M. & Eamer, B. (2009) Ceratozetes and Ceratozetoides (Acari: Oribatida: Ceratozetidae) of North America. The Canadian Entomologist, 141, 246–308
Behan-Pelletier, V.M. & Eamer, B. (2010) The first sexually dimorphic species of Oribatella (Acari, Oribatida, Oribatellidae) and a review of sexual dimorphism in the Brachypylina. Zootaxa, 2332, 1–20.
Berlese, A. (1908) Elenco di generi e specie nuovi di Acari. Redia, 5, 1–15.
Berlese, A. (1916) Centuria terza di Acari nuovi. Redia, 12, 283–338.
Bernini, F. (1975) Notulae Oribatologicae XIII. La famiglia Oribatellidae (Acarida, Oribatei) nell'Archipelago Toscano. Lavori della Societa Italiana di Biogeografia, Nuova Serie, 5, 429–507.
Chistyakov, M.P. (1984a) The postembryonic development of Oribatella sexdentata Berlese, 1916 (Oribatei). Gor'kovskiy Gos-udarstvennyy Pedagogicheskiy Institut imeni A.M. Gor'kogo. Gor'kiy. Deponirovano v VINITI. 68, 1–28. [In Russian]
Chistyakov, M.P. (1984b) The postembryonic development of Oribatella berlesei Michael, 1898 (Oribatei). Gor'kovskiy Gosu-darstvennyy Pedagogicheskiy Institut imeni A.M. Gor'kogo. Gor'kiy. Deponirovano v VINITI. 69, 1–20. [In Russian]
Csiszár, J. & Jeleva, M. (1962) Oribatid mites (Acari) from Bulgarian soils. Acta Zoologica Academiae Scientiarum Hungaricae, 8(3–4), 273–301
Fraser, D.F., Farr, D.R., Ramsay L.R., & Turner, N.J. (1989) Natural and Human History Interpretive Theme Document for Manning Provincial Park. Arenaria Research and Interpretation, Victoria, British Columbia, 258pp.
Fujikawa, T. (1990) Oribatid mites from Picea glehni forest at Mo-Ashoro, Hokkaido (4). A new species of the family Oribatellidae. Edaphologia, 44, 1–9
Grabowski, W.B. (1970) A new species of oribatid mite (Cryptostigmata: Oribatellidae). Great Basin Naturalist, 30(1), 5–8.
Grabowski, W.B. (1971) A new genus of oribatid mite (Cryptostigmata: Oribatellidae). Proceedings of the Entomological Society, Washington, 73(1), 44–47.
Grandjean, F. (1953a) Observations sur les oribates (27e série). Bulletin du Museum nationale d’Histoire Naturelle, 2e Série, 25, 469–476.
Grandjean, F. (1953b) Essai de classification des oribates (acariens). Bulletin de la Société. Zoologique de France, 78, 421–446.
Hammer, M. (1955) Alaskan oribatids. Acta Arctica, 7, 5–36.
Koch, C.L. (1835) Deutschlands Crustaceen, Myriapoden und Arachniden. Regensburg, Heft 1–3.
Krivolutsky, D.A. (1974) New oribatid mites of the USSR. Zoologicheskii Zhurnal, 53(12), 1880–1885. [in Russian]
Kulijev, K.A. (1962) Seven new species of oribatid mites (Acariformes, Oribatei) from Azerbaijan. Trudy Azerbaijan pedagogicheskogo instituta imeni V.I. Lenina, 20, 83–94. [in Russian]
Marshall, V.G., Reeves, R.M., & Norton, R.A. (1987) Catalogue of the Oribatida of continental United States and Canada. Memoirs of the entomological Society of Canada 139. 418pp.
Michael, A.D. (1880) A further contribution to the knowledge of British Oribatidae. Journal of the Royal Microscopical Society, 3, 225–251.
Michael, A.D. (1898) Oribatidae. In: Schulze, F.E. (Ed.), Das Tierreich, Friedländer und Sohn, Berlin, Lief. 3 (Acarina), vol. 8, 1–93.
Norton R.A., Alberti, G., Weigmann, G. & Woas, S. (1997) Porose integumental organs of oribatid mites (Acari, Oribatida). 1. Overview of types and distribution. Zoologica, Stuttgart, 146, 1–31.
Norton, R.A. & Behan-Pelletier, V.M. (2009) Oribatida. In: Krantz, G.W. & Walter, D.E. (eds.) A Manual of Acarology. 3rd ed. Texas Tech University Press, Lubbock, Texas. pp. 430– 564.
Shtanchaeva, U.Ya. & Subías, L.S. (2009) A review of oribatid mites of the family Oribatellidae (Acariformes, Oribatida) from the Caucasus. Zoologicheskii Zhurnal, 88(2), 143–163. [in Russian, Engl. Version: Entomological Review, 89(7), 849–873.]
Strenzke, K. (1950) Oribatella arctica litoralis n. subsp., eine neue Oribatide der Nord- und Ostseeküste (Acarina: Oribatei). Kieler Meeresforschungen, 7(2), 157–160.
Thor, S. (1930) Beiträge zur Kenntnis der Invertebratenfauna von Svalbard. Skrifter om. Svalbard og Ishavet, Oslo, 27, 1–156.
Travé, J. & Vachon, M. (1975) François Grandjean 1882–1975 (Notice biographique et bibliographique). Acarologia, 17, 1–19.
Walter, D.E., Latonas, S. & Byers, K. (2011) Almanac of Alberta Oribatida Ver. 2.1. The Royal Alberta Museum, Edmonton, AB. http://www.royalalbertamuseum.ca/natural/insects/research/research.htm (Accessed June 2, 2012).
Weigmann, G. (2001): Contribution to the taxonomy of European Poronota I. Oribatella and Anachipteria. Spixiana, 24(3), 235–240.
Weigmann, G. (2006) Hornmilben (Oribatida). Die Tierwelt Deutschlands, 76. Teil. Goecke & Evers, Keltern, 520 pp.