Adult and tritonymph of Scapheremaeus prodigialis sp. n. (Acari: Oribatida: Cymbaeremaeidae) from Vietnam

About author:

X-BIO Institute, Tyumen State University, Tyumen, Russia

Acknowledgments:

I thank Vladimir M. Salavatulin (University of Tyumen, Tyumen, Russia) for oribatid mite sampling, two anonymous reviewers for their valuable comments and the staff of the Kon Chu Rang Nature Reserve for their support during fieldwork. The work was performed within the framework of the Joint Russian–Vietnamese Biological Expedition, financially supported by the Russian Academy of Sciences. The collection of materials was conducted under the Agreement on the scientific cooperation between the Kon Chu Rang Nature Reserve and the Joint Russian–Vietnamese Tropical Research and Technological Center.

Annotation:

An adult and a tritonymphal instar of a new arboreal species—Scapheremaeus prodigialis sp. n. (Oribatida, Cymbaeremaeidae)—are described from the Kon Chu Rang Nature Reserve, central Vietnam. The adult is characterized by: costula with long, broad and rounded distally cusp; lamellar seta comparatively long, thickened; interlamellar and exobothridial setae absent; circumdorsal scissure absent; dorsocentral region of notogaster sparsely tuberculate, with two large, weakly developed raised parts and three weakly visible transverse furrows; nine pairs of notogastral setae with c, dm and dp short, weakly swollen distally, la, lm, lp and h1–h3 comparatively long, thickened, weakly dilated in distal half, c and la located close to each other, lm, lp and h1–h3 located in posterolateral position. The tritonymph is characterized by: flattened and comparatively broad body; sparsely plicate gastronotic surface; short, acicular bothridial seta; vestigial bothridium; long, setiform lamellar and interlamellar setae; long, setiform gastronotic setae c3, la, lm, lp, h1–h3 and p1 inserted on large tubercles; and short, acicular gastronotic setae c1, c2, da, dm and dp.

DOI: 10.21684/0132-8077-2025-33-2-93-100

Bibliography:

Aoki, J. 1966. Oribatid mites from bird’s nests on Midway Island. Pacific Insects, 8: 770–776.

Berlese, A. 1908. Elenco di generi e specie nuove di Acari. Redia, 5: 1–15.

Berlese, A. 1910. Acari nuovi. Manipulus V–VI. Redia, 6: 199–234.

Colloff, M. J. 2009. Comparative morphology and species-groups of the oribatid mite genus Scapheremaeus (Acari: Oribatida: Cymbaeremaeidae), with new species from South Australia. Zootaxa, 2213: 1–46. https://doi.org/10.11646/zootaxa.2213.1.1

Colloff, M. J. 2010. The hyperdiverse oribatid mite genus Scapheremaeus (Acari: Oribatida: Cymbaeremaeidae) in Australia, with descriptions of new species and consideration of biogeographical affinities. Zootaxa, 2475: 1–38. https://doi.org/10.11646/zootaxa.2475.1.1

Corpuz-Raros, L. and Ermilov, S. G. 2019. Catalogue of oribatid mites (Acari: Oribatida) from the Malay Archipelago. Zootaxa, 4716: 1–240. https://doi.org/10.11646/zootaxa.4716.1.1

Ermilov, S. G. 2024. Description of juvenile instars of Scapheremaeus tonatiuh Palacios-Vargas, Ríos Vázquez, 1998 (Acari, Oribatida, Cymbaeremaeidae). Zootaxa, 5485: 62–72. https://doi.org/10.11646/zootaxa.5485.1.7

Ermilov, S. G. and Anichkin, A. E. 2015. A new species of oribatid mites of the genus Scapheremaeus (Acari, Oribatida, Cymbaeremaeidae) from Vietnam. Zoologichesky Zhurnal, 94: 488–493. [In Russian]

Ermilov, S. G. and Salavatulin, V. M. 2022. Description of ontogenetic instars of Scapheremaeus marati sp. nov. (Acari, Oribatida, Cymbaeremaeidae) from Vietnam. Systematic and Applied Acarology, 27: 2369–2385. https://doi.org/10.11158/saa.27.12.1

Ermilov, S. G. and Salavatulin, V. M. 2023. Two new species of arboreal Scapheremaeus (Acari, Oribatida, Cymbaeremaeidae) from Vietnam. Systematic and Applied Acarology, 28: 1405–1414. https://doi.org/10.11158/saa.28.8.11

Fernández, N. A. and Cleva, R. (1997) Contribution à la connaissance du genre Scapheremaeus habitant les plantes epiphytes. I. Scapheremaeus tillandsiae sp. n. Acarologia, 38: 289–296.

Fernández, N. A. and Cleva, R. (2009) Contribution à la connaissance des oribates d’Argentine. I. Le genre Scapheremaeus: Scapheremaeus chaquensis n. sp. Acarologia, 49: 55–67.

Hammer, M. 1958. Investigations on the oribatid fauna of the Andes Mountains. I. The Argentine and Bolivia. Det Kongelige Danske Videnskabernes Selskab Biologiske Skrifter, 10: 1–129.

Mahunka, S. 1987. A survey of the Oribatid (Acari) fauna of Vietnam, I. Annales Historico-Naturales Musei Nationalis Hungarici, 79: 259–279.

Mahunka, S. 1988. A survey of the Oribatid Fauna (Acari) of Vietnam, II. Acta Zoologica Hungarica, 34: 215–246.

Michael, A. D. 1890. On a collection of Acarina formed in Algeria. Proceedings of the Scientific Meetings of the Zoological Society of London, Part I: 414–425.

Norton, R. A. 1977. A review of F. Grandjean’s system of leg chaetotaxy in the Oribatei (Acari) and its application to the family Damaeidae. In: D. L. Dindal (Ed.), Biology of Oribatid Mites. SUNY College of Environmental Science and Forestry, Syracuse, pp. 33–61.

Norton, R. A. and Behan-Pelletier, V. M. 2009. Suborder Oribatida. Chapter 15. In: G. W. Krantz and D. E. Walter (Eds.), A Manual of Acarology. Texas Tech University Press, Lubbock, pp. 430–564.

Norton, R. A. and Ermilov, S. G. 2014. Catalogue and historical overview of juvenile instars of oribatid mites (Acari: Oribatida). Zootaxa, 3833: 1–132. https://doi.org/10.11646/zootaxa.3833.1.1

Norton, R. A. and Ermilov, S. G. 2024. Catalogue of juvenile instars of oribatid mites (Acari: Oribatida)—the next decade (2014–2023). Zootaxa, 5419: 451–494. https://doi.org/10.11646/zootaxa.5419.4.1

Norton, R. A., Franklin, E. and Crossley, D. A. 2010. Scapheremaeus rodickae sp. n. (Acari: Oribatida: Cymbaeremaeidae) associated with temporary rock pools in Georgia, with key to Scapheremaeus species in eastern USA and Canada. Zootaxa, 2393: 1–16. https://doi.org/10.11646/zootaxa.2393.1.1

Palacios-Vargas, J. G., Rios, G. and Vazquez, M. 1998. A new Mexican Scapheremaeus (Oribatei: Cymbaeremaeidae) from tropical forests. Acarologia, 39: 383–388.

Salavatulin, V. M. 2019. Microhabitat distribution of arboreal oribatid mites (Oribatida), associated with the Siberian pine (Pinus sibirica) of Western Siberia. Experimental and Applied Acarology, 78: 469–483. https://doi.org/10.1007/s10493-019-00401-4

Sellnick, M. 1924. Oribatiden. In: A. Dampf (Ed.), Zur Kenntnis der Estländischen Hochmoorfauna. Sitzungsberichte der Naturforscher-Gesellschaft bei der Universität Dorpat. Vol. 31, pp. 65–71.

Travé, J. and Fernández, N. 1986. Contribution à la connaissance du genre Scapharemaeus: S. argentinensis, n. sp. (Oribate). Acarologia, 27: 349–359.

Travé, J. and Vachon, M. 1975. François Grandjean. 1882–1975 (Notice biographique et bibliographique). Acarologia, 17: 1–19.

Wang, H. F. 1998. Studies on the genus Scapheremaeus in China (Acari: Oribatida: Cymbaeremaeidae). Acta Zootaxonomica Sinica, 23: 252–263.