Abstract
This study is based on oribatid mite materials collected from riverine environments in La Réunion Island. We found thirteen species, belonging to 11 genera and eight families. Two new species of the family Galumnidae—Galumna (Galumna) reunionensis sp. nov. and Pergalumna (Pergalumna) aquatica sp. nov.—are described. Galumna (Galumna) reunionensis sp. nov. differs from the congeners (G. (G.) capensis, G. (G.) paracapensis, and G. (G.) szentivanyorum) by the body size, the body integument, the length of the rostral and lamellar setae, the morphology of the bothridial seta, the size and presence/absence of a median pore, the morphology of the notogastral porose areas, and the location of the adanal lyrifissure. Pergalumna (Pergalumna) aquatica sp. nov. differs from the congener (P. (P.) silvatica) by the body size, the shape of the rostrum, the surface of the genital plate, and the presence/absence of the postanal porose area. A list of the known oribatid mites of La Réunion, including 71 species, 47 genera and 26 families, is provided.
References
- Balogh, J. & Balogh, P. (1983) New oribatid mites from Australia (Acari: Oribatei). Acta Zoologica Academiae Scientiarum Hungaricae, 29, 81–105.
- Berlese, A. (1914) Acari nuovi. Manipulus IX. Redia, 10, 113–150.
- Engelbrecht, C.M. (1969) Some South African species of the genus Galumna Von Heyden, 1826 (Acari: Galumnidae). Journal of the Entomological Society of Southern Africa, 32, 99–122.
- Ermilov, S.G. (2022) A new species of Galumna (Acari, Oribatida, Galumnidae) from Malawi, with a key to known species of the genus from the Afrotropical region. Systematic and Applied Acarology, 27, 1734–1744. https://doi.org/10.11158/saa.27.9.4
- Ermilov, S.G. & Klimov, P.B. (2017) Generic revision of the large-winged mite superfamily Galumnoidea (Acari, Oribatida) of the world. Zootaxa, 4357 (1), 1–72. https://doi.org/10.11646/zootaxa.4357.1.1
- Ermilov, S.G. & Mary, N.A. (2020) Contribution to the knowledge of oribatid mites (Acari, Oribatida) of New Caledonia. Zoologichesky Zhurnal, 99, 405–412. https://doi.org/10.31857/S0044513420040066
- Ermilov, S.G. & Mary, N. (2025) Oribatid mites (Acari, Oribatida) from riverine environments in New Caledonia. Persian Journal of Acarology, 14, 455–464. https://doi.org/10.22073/pja.v14i3.87161
- Ermilov, S.G. & Rybalov, L.B. (2020) A new species of Galumna (Acari, Oribatida, Galumnidae) from Ethiopia. Acarina, 28, 23–28. https://doi.org/10.21684/0132-8077-2020-28-1-23-28
- Ermilov, S.G. & Starý, J. (2018) New taxa of oribatid mites from Korup National Park (Cameroon). The genus Pergalumna (Acari, Oribatida, Galumnidae), with description of three new species and a key to known species from the Ethiopian region. Zootaxa, 4425 (2), 201–222. https://doi.org/10.11646/zootaxa.4425.2.1
- Ermilov, S.G. & Starý, J. (2022) Three new species of Pergalumna (Acari, Oribatida, Galumnidae) from Malawi, with updated identification key to known species of the genus from the Afrotropical region. Zootaxa, 5133 (2), 226–240. https://doi.org/10.11646/zootaxa.5133.2.4
- Ermilov, S.G., Alvarado-Rodríguez, O. & Retana-Salazar, A.P. (2014) Two new species of Pergalumna (Acari, Oribatida, Galumnidae) from Costa Rica, including a key to all species of the genus from the Neotropical region. ZooKeys, 435, 7–23. https://doi.org/10.3897/zookeys.435.8213
- Ermilov, S.G., Hugo-Coetzee, E.A. & Theron, P.D. (2018) To the knowledge of oribatid mites of the subgenus Galumna (Galumna) Heyden 1826 (Acari, Oribatida, Galumnidae) in South Africa, with a key to species known from the Ethiopian region. Zoologichesky Zhurnal, 97, 515–527. https://doi.org/10.7868/S0044513418050033
- Ermilov, S.G., Tolstikov, A.V., Mary, N. & Schatz, H. (2013) Oribatid mites (Acari, Oribatida) from riverine environments of some islands in Oceania. ZooKeys, 318, 47–57. https://doi.org/10.3897/zookeys.318.5971
- Grandjean, F. (1936) Les Oribates de Jean Frédéric Hermann et de son père. Annales de la Société Entomologique de France, 105, 27–110.
- Hammer, M. (1961) Investigations on the oribatid fauna of the Andes Mountains. II. Peru. Det Kongelige Danske Videnskabernes Selskab Biologiske Skrifter, 13, 1–157.
- Hermann, J.F. (1804) Mémoire aptérologique. De l'Imprimerie de F.G. Levrault, Strassbourg, 144 pp. https://doi.org/10.5962/bhl.title.137910
- Heyden, C. von (1826) Versuch einer systematischen Eintheilung der Acariden. Isis, Oken, 1, 607–613.
- Koch, C.L. (1844) Deutschlands Crustaceen, Myriapoden und Arachniden. Heft 38. F. Pustet, Regensburg, 1 pp.
- Mahunka, S. (1977) Neue und interessante Milben aus dem Genfer Museum XX. Contribution to the oribatid fauna of S.E. Asia (Acari, Oribatida). Revue suisse de Zoologie, 84, 247–274. https://doi.org/10.5962/bhl.part.91385
- Mahunka, S. (1978a) Neue und interessante Milben aus dem Genfer Museum XXVII. A first survey of the oribatid (Acari) fauna of Mauritius, Reunion and the Seychelles I. Revue suisse de Zoologie, 85, 177–236. https://doi.org/10.5962/bhl.part.82228
- Mahunka, S. (1978b) Neue und interessante Milben aus dem Genfer Museum XXXIV. A compendium of the oribatid (Acari) fauna of Mauritius, Reunion and the Seychelles Is. II. Revue suisse de Zoologie, 85, 307–340. https://doi.org/10.5962/bhl.part.82234
- Mahunka, S. (1988) Neue und interessante Milben aus dem Genfer Museum LII. Oribatids from Mauritius, Réunion and the Seychelles III (Acari: Oribatida). Revue Suisse de Zoologie, 95, 1079–1115. https://doi.org/10.5962/bhl.part.81954
- Niedbała, W. & Liu, D. (2023) Systematic, synonymic and biogeographical list of ptyctimous mites (Acari: Oribatida) in the world (1799–2022). Zootaxa, 5265, 1–442. https://doi.org/10.11646/zootaxa.5265.1.1
- Niedbała, W. & Stary, J. (2015) Two new species of the superfamily Phthiracaroidea (Acari, Oribatida) from the Seychelles and the USA with notes on other ptyctimous mites from diverse countries. Acta Zoologica Academiae Scientiarum Hungaricae, 61, 87–118. https://doi.org/10.17109/AZH.61.2.87.2015
- Niedbała, W., Bąkowski, M., Kaczmarek, S., Starý, J., Witaliński, W. & Skoracki, M. (2023) A new and some interesting species of ptyctimous mites (Acari, Oribatida) from different countries of the all worldly zoogeographical regions. Systematic and Applied Acarology, 28, 364–393. https://doi.org/10.11158/saa.28.2.17
- Norton, R.A. & Behan-Pelletier, V.M. (2009) Suborder Oribatida. In: Krantz, G.W. & Walter, D.E. (Eds.), A Manual of Acarology. Texas Tech University Press, Lubbock, Texas, pp. 430–564.
- Schatz, H., Behan-Pelletier, V.M., OConnor, B.M. & Norton, R.A. (2011) Suborder Oribatida van der Hammen, 1968. In: Zhang, Z.-Q. (Ed.), Animal biodiversity: An outline of higher-level classification and survey of taxonomic richness. Zootaxa, 3148 (1), pp. 141–148. https://doi.org/10.11646/zootaxa.3148.1.26
- Subías, L.S. (2022) Listado sistemático, sinonímico y biogeográfico de los ácaros oribátidos (Acariformes: Oribatida) del mundo (excepto fósiles). Monografías Electrónicas Sociedad Entomológica Aragonesa, 12, 1–538.
- Subías, L.S. (2024) Listado sistemático, sinonímico y biogeográfico de los ácaros oribátidos (Acariformes: Oribatida) del mundo (excepto fósiles), 19ª actualización, 1–545. Available from: http://bba.bioucm.es/cont/docs/RO_1.pdf (accessed January 2024)