Homotropus megaspis Thomson 1890
Creators: name: Morishita, Shunsuke
name: Watanabe, Kyohei
Publisher: name: Zenodo
Year: 2025
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Hymenoptera
Ichneumonidae
Homotropus
Homotropus megaspis

description: Homotropus megaspis Thomson, 1890
(Figs 10 A–E)
Homotropus megaspis Thomson, 1890: 1516.
Homotropus megalaspis Schulz, 1906: 115.
Homotropus momoii Uchida, 1957: 262. Syn. nov.
Syrphoctonus tenuitibialis Uchida, 1957: 261. Syn. nov.
Homotropus megaspis: Dasch, 1964: 100.
Homotropus momoii: Townes et al., 1965: 404.
Homotropus tenuitibialis: Townes et al., 1965: 405.
Homotropus megaspis: Klopfstein, 2014b: 68.
Specimens examined. JAPAN: [Hokkaido] 1F, Hidaka Town, Uenzaru-gawa, 10 VII–1 VIII 2007, A. Ueda leg. (MsT) (KPMNH); 1F, Kamishihoro Town, Nukabira, 22. VI. 1980, H. Takemoto leg. (NARO); 1M (holotype of S. tenuitibialis), Sapporo, 30. V. 1956, K. Kamijo leg. (SEHU); 1F, Soranuma, 17. VIII. 1967, K. Kusigemati leg. (SEHU); [Honshu] 2M, Yamagata Pref., Mamurogawa Town, 22. VI. 2012, Y. Matsubara & K. Fukuda leg. (KPMNH); 1F, Yamagata Pref., Mt. Asahidake, 27. VII. 1969, H. Takizawa leg. (SEHU); 1F, Tochigi Pref., Nasushiobara City, Kotaki, 24–30 VII 2008, T. Matsumura leg. (MsT) (KPMNH); 1M, Gunma Pref., Katashina Vil., Mt. Hotakasan, 2. VIII. 2007, K. Watanabe leg. (KPNMH); 2M, Niigata Pref., Nagaoka City, Suyoshi, Mt. Nokogiriyama, 7. VI. 2014, S. Shimizu leg. (KPNMH); 2F, Niigata Pref., Sado Is., Kanaishinbo, Hakuundai, Mt. Myokenzan, 4. VIII. 2009, K. Watanabe leg. (KPNMH); 1F, Yamanashi Pref., Koshu City, Yanagisawa-toge, 5. VIII. 2008, K. Watanabe leg. (KPNMH); 1F, Yamanashi Pref., Hokuto City, Masutomi, Biwakubosawa, 24. VI. 2007, K. Watanabe leg. (KPNMH); 1F, ditto, 24. VI. 2007, T. Ban leg. (KPNMH); 1M, Yamanashi Pref., Koshu City, Sagashio, 17. V. 2008, T. Muraki leg. (KPNMH); 1M, Kanagawa Pref., Mt. Omuroyama, 7. VI. 2013, (FIT) (KPMNH); 1M, Kanagawa Pref., Hadano City, Tanzawaterayama, Yabitsu-toge, Mt. Oyama, I. Waki leg. (KPNMH); 1M, Kanagawa Pref., Hadano City, Mt. Koubouyama, 5. IV. 2007, K. Watanabe leg. (KPNMH); 1F1M, ditto, 6. IV. 2008, K. Watanabe leg. (KPMNH); 1F1M, ditto, 12. IV. 2008, K. Watanabe leg. (KPMNH); 1M, Kanagawa Pref., Odawara City, Kayama, Sakawagawa, 25. III. 2017, K. Watanabe leg. (KPNMH); 1M, Kanagawa Pref., Hinatayakushi, 29. VI. 1974, H. Takizawa leg. (SEHU); 4M, Shizuoka Pref., Honkawane Town, Mt. Yamainudan, 14. VI. 2008, K. Watanabe leg. (KPNMH); 1F, Nagano Pref., Kawakami Vil., Azusayama, 14. VI. 2015, K. Watanabe leg. (KPNMH); 1M, Nagano Pref., Otaki Vil., Mt. Ontakesan, Hakkaisan, 5. VIII. 2010, K. Watanabe leg. (KPNMH); 2M, ditto, 6. VIII. 2010, K. Watanabe leg. (KPNMH); 1M, ditto, 7. VIII. 2010, K. Watanabe leg. (KPNMH); 1F, ditto, 8. VIII. 2010, K. Watanabe leg. (KPNMH); 1F, Nagano Pref., Otaki Vil., Mt. Ontakesan, Tanohara, 17. VII. 2007, K. Watanabe leg. (KPNMH); 2M, ditto, 9. VIII. 2007, K. Watanabe leg. (KPNMH); 1F, Toyama Pref., Toyama City, Arimine, jurodani, 7–14 VII 2009, M. Watanabe leg. (MsT) (KPMNH); 1F, Toyama Pref., Toyama City, Arimine, Inonedani, 25 VIII–1 IX 2009, M. Watanabe leg. (MsT) (KPMNH); 1F, Toyama Pref., Toyama City, Kamegai, 15–26 IX 2009, M. Watanabe leg. (MsT) (KPMNH); 1F, Aichi Pref., Shitara Town, Tsuguhonsawa, 26 V–23 VI 2020, S. Morishita leg. (TMNH); 1F, Aichi Pref., Toyohashi City, Imure-cho, Takayama, 21. V. 2019, S. Morishita leg. (TMNH); 1F, Aichi Pref., Toyohashi City, Suse-cho, Kanbata, 23. X. 2018, S. Morishita leg. (TMNH); 1M, Fukui Pref., Ikeda Town, Mizuumi, Mt. Hekosan, 18. VI. 2016, S. Shimizu leg. (KPNMH); 1F, Hyogo Pref., Sayo Town, Funakoshi, 28 III–4 IV 2010, (KPNMH); [Izu Isis.] 1F (holotype of H. momoii), Tokyo, Izuoshima Is., 25. V. 1955, S. Momoi leg. (SEHU); [Shikoku] 1M, Kochi Pref., Umaji Vil., 24. VI. 2010, Y. Matsubara & K. Fukuda leg. (MsT) (KPNMH); [Kyushu] 1F, Kagoshima Pref., Mt. Kirishima, 27. V. 1966, K. Kusigemati leg. (SEHU); 1F, Kagoshima Pref., Mt. Kurinodake, 10. V. 1967, K. Kusigemati leg. (SEHU). GERMANY: 1M (det. S. Klopfstein), Oberhartz, Clausthal, 26. XI. 1928, G. Meyer leg. (ZSM).
Diagnosis. See Klopfstein (2014b).
Distribution. Japan (Hokkaido, Honshu, Izuoshima Is., Shikoku, and Kyushu). Outside Japan, this species is widely distributed in Palearctic region (Yu et al. 2016).
Bionomics. Host is unknown. In Japan, adults were collected in broad-leaved forest.
Remarks. This is the first record of this species from Japan.
description: Published as part of Morishita, Shunsuke & Watanabe, Kyohei, 2025, Review of the genera Homotropus Förster and Syrphoctonus Förster (Hymenoptera, Ichneumonidae, Diplazontinae) from Japan, pp. 49-76 in Zootaxa 5588 (1) on pages 64-67, DOI: 10.11646/zootaxa.5588.1.2, http://zenodo.org/record/14896032