Skip to main content Skip to main navigation menu Skip to site footer
Responsive image
Issue: Vol. 5691 No. 3: 10 Sept. 2025
Type: Article
Published: 2025-09-10
DOI: 10.11646/zootaxa.5691.3.6
Page range: 561-578
Abstract views: 180
PDF downloaded: 5

Three new species of the Rhyacophila retracta species group (Trichoptera, Rhyacophilidae) from Japan

Lago Co.; Ltd.; 396-2; Taga-cho; Ômi-hachiman-shi; Shiga; 523-0821 Japan
Trichoptera caddisfly male female diagnosis distribution habitat

Abstract

Three new species of the Rhyacophila retracta Species Group Ross 1956 are described from Japan: R. geranos sp. nov., R. humerigera sp. nov. and R. koryne sp. nov. Adult males and females of the three new species are described and illustrated. Illustrations of male and female genitalia of four previously known species belonging to this species group, R. retracta Martynov 1914, R. motakanta Schmid 1970, R. lambakanta Schmid 1970, and R. orthacantha Emoto 1979, are provided for comparisons. Distribution maps for all seven species are presented.

 

References

  1. Aoya, K. & Tanaka, M. (2023) Trichoptera collected by a Malaise trap beside the Shibukuro Stream, a highly acidic tributary of the Tamagawa River, Akita Prefecture, northern Honshu, Japan. Biology of Inland Waters, 38, 23–30. [in Japanese with English abstract]
  2. Arefina, T.I. (1997) Family Rhyacophilidae. In: Lehr, P.A. (Ed.), Key to the insects of Russian Far East. Vol. 5. Trichoptera and Lepidoptera. Dal’nauka, Vladivostok, pp. 22–33. [in Russian]
  3. Arefina, T.I. (2001) An outline of females of the genus Rhyacophila (Trichoptera: Rhyacophilidae) from Eastern Asia. In: Bae, Y.J. (Ed.), The 21st Century and Aquatic Entomology in East Asia. Proceedings of the 1st Symposium of Aquatic Entomologists in East Asia. The Korean Society of Aquatic Entomology, Seoul, pp. 21–44.
  4. Botosaneanu, L. (1970) Trichopteres de la République Démocratique-Populaire de la Corée. Annales Zoologici, 17, 275–359.
  5. Emoto, J. (1979) A revision of the retracta-Group of the genus Rhyacophila Pictet (Trichoptera: Rhyacophilidae). Kontyû, 47, 556–569.
  6. Hattori, T. (2005) Rhyacophilidae. In: Kawai, T. & Tanida, K. (Eds.), Aquatic Insects of Japan: Manual with Keys and Illustrations. Tokai University Press, Kanagawa, pp. 414–437. [in Japanese]
  7. Inazu, K. (2008) Collection record of caddisflies in the Itoi River Hyogo over 5 years (2001–2005)—Notes on emergence periods, classification, distribution, and ecology of adults and larvae. Hyōgo Freshwater Biology, 60, 59–104. [in Japanese]
  8. Inazu, K. & Nishida, A. (2011) Trichoptera. In: Hyogo Freshwater Biology Society (Ed.), Hyogo no kawa no ikimono zukan [Illustrated Guide to River Organisms of Hyogo Prefecture]. Hyogo Freshwater Biology Society, Himeji, pp. 169–212. [in Japanese]
  9. Ivanov, V.D. (2011) Caddisflies of Russia: Fauna and biodiversity. Zoosymposia, 5, 171–209. https://doi.org/10.11646/zoosymposia.5.1.15
  10. Kang, M. (2020) The Korean caddisflies. Nature and Ecology, Seoul, 548 pp. [in Korean]
  11. Kobayashi, M. (1973) Caddis fly fauna of the vicinity of the Yamagata Prefecture, with descriptions of thirteen new species. Bulletin of the Kanagawa prefectural Museum (Natural Science), 6, 21–43, pls. 3–10.
  12. Kobayashi, M. (1984) Sadogashima no moshi-moku nitsuite [On the caddisflies of Sadogashima]. Essa Konchu Dokokai Kaiho, 58, 3–10. [in Japanese]
  13. Kobayashi, M. (1985) Third results of Trichoptera (Insecta) collecting with light traps at Konomazawa, Tsukui-machi, Kanagawa Prefecture. Natural History Report of Kanagawa, 9, 67–74. [in Japanese]
  14. Kobayashi, M. (1989) A taxonomic study on the Trichoptera of South Korea, with Description of Four New Species (Insecta). Bulletin of the Kanagawa prefectural Museum (Natural Science), 18, 1–9.
  15. Lepneva, S.G. (1964) Fauna SSSR, Rucheiniki. Vol. 2. No. 1. Lichinki i kukolki podotryada kol’chatoshchupikovykh. Zoologicheskii Institut Akademii Nauka SSSR, Moscow-Leningrad, 638 pp. [in Russian]
  16. Martynov, A.V. (1914) Notes on the Trichotptera collected by the Prof. P. SUSHKIN’s Expedition to the Altai during 1912. Revue Russe d’ Entomologie, 14, 72–84.
  17. Morse, J.C. (2025) Trichoptera World Checklist. Available from: https://trichopt.app.clemson.edu/welcome.php (accessed 10 March 2025)
  18. Nojima, K. (2017) Caddisflies (Insecta: Trichoptera) in Okayama Prefecture, western Japan. Biology of Inland Waters, 32, 107–131. [in Japanese with English abstract]
  19. Nozaki, T. (2016) Trichoptera. In: Maruyama, H. & Hanada, S. (Eds.), A Field Guide to Japanese Aquatic Insects: Adults of Mayflies, Stoneflies and Caddisflies. Zenkoku Noson Kyoiku Kyokai, Tokyo, pp. 69–87, 294–410, 429–442, 449–451, 456–461. [in Japanese]
  20. Nozaki, T., Park, S.J. & Kong, D. (2019) Reexamination of five caddisfly species (Trichoptera, Insecta) recorded from South Korea by Kobayashi (1989). Animal Systematics, Evolution and Diversity, 35, 1–5. https://doi.org/10.5635/ASED.2019.35.1.027
  21. Pictet, F.J. (1834) Recherches pour servir à l’histoire et l’anatomie des Phryganides. A. Cherbuliez, Geneva, 20 + 235 pp., 20 pls. https://doi.org/10.5962/bhl.title.8547
  22. Ross, H.H. (1956) Evolution and Classification of the Mountain Caddisflies. The University of Illinois Press, Urbana, 213 pp.
  23. Schmid, F. (1970) Le genre Rhyacophila et la famille des Rhyacophilidae (Trichoptera). Mémoires de la Société Entomologique du Canada, 66, 5–230, pls. 1–52. https://doi.org/10.4039/entm10266fv
  24. Taira, A. (2023) Life cycles and larval and pupal habitats of eleven Japanese Rhyacophila (Trichoptera) species at the mountain streams in central Honshu. Contributions to Entomology, 73 (2), 181–194. https://doi.org/10.3897/contrib.entomol.73.e108102
  25. Taira, A., Nozaki, T. & Kawase, N. (2025) A catalogue of Japanese Trichoptera, Family Rhyacophilidae. Available from: http://tobikera.eco.coocan.jp/catalog/Rhyacophilidae.html (accessed 10 July 2025)
  26. Tanaka, M. (2012) Akita-ken no tobikera bunpu shiryo 1 [Caddisflies of Akita Prefecture 1]. Akita Nature Study, 61, 20–23. [in Japanese]
  27. Tanaka, M. (2014) Akita-ken no tobikera bunpu shiryo 3 [Caddisflies of Akita Prefecture 3]. Akita Nature Study, 65, 36–41. [in Japanese]
  28. Tanaka, M. (2022) Akita-ken no tobikera bunpu shiryo 14 [Caddisflies of Akita Prefecture 14]. Akita Nature Study, 79, 34–39. [in Japanese]
  29. Tani, K. (1977) Trichoptera. In: Ito, S., Okutani, T. & Hiura, I. (Eds.), Colored Illustrations of the Insects of Japan 2. Hoikusha, Osaka, pp. 184–206, pls. 43–44. [in Japanese]
  30. Tani, K. (1978) Niigata-ken no tobikera [Caddisflies of Niigata Prefecture I]. Essa Kontyu Dokokai Kaiho, 49, 2–26. [in Japanese]
  31. Tanida, K. (1985) Trichoptera. In: Kawai, T. (Ed.), An Illustrated Book of Aquatic Insects of Japan. Tokai University Press, Tokyo, pp. 167–215. [in Japanese]
  32. Tsuda, M. (1940) Zur Kenntnis der Japanischen Rhyacophilinen (Rhyacophilidae, Trichoptera). Annotationes Zoologicae Japonenses, 19, 119–135.
  33. Yamamoto, E., Nozaki, T., Kuhara, N. & Ito, T. (2021) Caddisflies (Trichoptera) collected from a mountain stream, Namakusa-dani, in Shikoku, western Japan. In: Yamamoto Institute of Forest Biology (Ed.), Aquatic Insects of Odamiyama and Nature of Matsubara-izumi. Ecosystem Conservation Society of Ehime, Ehime, pp. 67–76. [in Japanese]
  34. Yang, L., Sun, C., Wang, B. & Morse, J.C. (2005) Present status of Chinese Trichoptera, with annotated checklist. In: Tanida, K. & Rossiter, A. (Eds.), Proceedings of the 11th International Symposium on Trichoptera (2003, Osaka). Tokai University Press, Kanagawa, pp. 441–465.

How to Cite

Kawase, N. (2025) Three new species of the Rhyacophila retracta species group (Trichoptera, Rhyacophilidae) from Japan. Zootaxa, 5691 (3), 561–578. https://doi.org/10.11646/zootaxa.5691.3.6