Tachinus (Tachinus) obesus Weise, 1877

Hashizume, Takuto, Schülke, Michael & Maruyama, Munetoshi, 2024, Tachinus of Japan (Coleoptera: Staphylinidae: Tachyporinae): new records, a new synonym, and a new species, Acta Entomologica Musei Nationalis Pragae 64 (1), pp. 121-139 : 135

Tachinus (Tachinus) obesus Weise, 1877

[Japanese name: Niseyamato-marukubi-hanekakushi]

( Fig. 3E )

Tachinus obesus Weise, 1877: 92 (original description); SCHȖLKE (2004): 957 (designation of a neotype).

Tachinus kasugensis Ito, 1993: 63 (original description); LI (1995a): 66 (diagnostic redescription); SCHȖLKE (2004): 957 (synonymized with T. obesus ).

Material examined. JAPAN: HONSHU: YAMANASHI- KEN: 1 ♁, Premises of the University of Tokyo Yamanaka Seminar House, the western side of Yamanaka-ko, Yamanakako-mura, 10.ix.1981, K. Haga leg. ( KUM); 1 ♁, Kamiyoshida, Fujiyoshida-shi, 25.ix.2022, N. Tsuji leg. ( KUM). SHIKOKU: TOKUSHIMA- KEN: 1 ♁, Tsurugi-san, 19–20. vi.1981, S. Naomi leg. ( KUM); 1 ♁, Tsurugi-san, 17.viii.1971, A. Watanabe leg. ( KUM). KAGAWA- KEN: 1 ♁, Mizushi, Toramaru-yama, Shingû-ike, Higashikagawa-shi, 11–17.v.2012, Sanbonmatsu High School leg. ( KUM). EHIME- KEN: 1 ♁, Omogokei, Kumakôgen-chô, 15.vi.1981, S. Naomi leg. ( KUM); 1 ♁, Ishizuchi-san, 28.vii.–2.viii.1988, K. Nemoto leg. ( KUM); 2 exs., Ichizuchi National Park, Tsuchigoya (1400 m alt.), 11–18.viii.1980, beech-fir-forest, Malaise trap, S. & J. Peck leg. (cSch, fürther specimens in FMNH); 1 ex., Ishizuchi-san, 4.vi.1952, Y. Wada leg. ( NHMW). KYUSHU: FUKUOKA- KEN: 2 ♁♁ 2 ♀♀, Inunaki-yama, Miyawaka-shi, 22.v.1980, T. Gotô leg. ( KUM); 2 ♁♁, Tachibana-yama, Fukuoka-shi, 27.xi.1983, S. Naomi leg. ( KUM); 1 ♁, same data, but 7.v.1980 ( KUM); 1 ♁, Hiko-san, 7.vii.1970, K. Takeno leg. ( KUM); 1 ♁ 1 ♀, Hiko-san, 19.ix.1974, M. T. Chûjô leg.( KUM); 1 ♀, Fukakura-kyô, Soeda-machi, 26.v.1976, H. Ôishi leg. ( KUM); 2 ♀♀, Kusenbui-Yama, 13.v.2014, K. Kido leg. ( KUM); 1 ♀, same data, but 9.vi.2014 ( KUM); 1 ♁ 1 ♀, same data, but 19.vi.2014 ( KUM). SAGA- KEN: 1 ♀, Sefuri-san, 3.x.1976, H. Ôishi leg. ( KUM); 1 ♀, Oku-Hiratani, Kashima-shi, 18.v.1975, Y. Eguchi leg. ( KUM); 1 ♁, Kyô-ga-take, 10.x.1981, S. Nomura leg. ( KUM); 2 ♀♀, Kyô-ga-take, 3.v.1976, H. Ôishi leg. ( KUM); 1 ♀, Ryûmon-kyô, 23.x.1977, Ôishi leg. ( KUM). NAGASAKI- KEN: 1 ♀, Tashirobaru, 3.xi.1976, S. Imasaka leg.( KUM); 5 ♁♁ 5 ♀♀, Unzen-dake, 24–25.ix.1983, M. Chûjô leg. ( KUM); 1 ♀, Unzen-dake, 3.xi.1976, S. Imasaka leg. ( KUM); 1 ♁ 2 ♀♀, same data. but 28.ix.1979 ( KUM); 1 ♀, same data, but 30.x.1979 ( KUM); 1 ♀, same data, but 10.vi.1980 ( KUM); 2 ♀♀, same data, but 29.ix.1981 ( KUM); 1 ♀, Unzen-dake, 6.vi.1977, S. Imasaka leg. ( KUM); 2 ♀♀, same data, but 18.x.1977 ( KUM); 1 ♁, Akamatsudani, Shimabara, Shimabara-shi, 27.x.1978, S. Imasaka leg.; 2 ♁♁, same data, but 10.x.1979 ( KUM); 3 ♁♁ 1 ♀, Nagasaki ( KUM); 1 ♁, Nagasaki 22.v.–3.vi.81, G. Lewis leg. ( BMNH). KUMAMOTO- KEN: 2 ♁♁ 2 ♀♀, Kikuchi-keikoku, Kikuchi-shi, 26.ix.1982, M. Matsuzaki leg. ( KUM); 1 ♁, Kikuchi-keikoku, Kikuchi-shi, 17.v.1997, S. Nomura leg. ( KUM); 1 ♁ 1 ♀, Shiratori-yama, 19.vi.1988, S. Ogata leg. ( KUM); 1 ♀, “Mt. Hakucho Gokanosho”, Yatsushiro-shi, 26.viii.1983, H. Takemoto leg. ( KUM). OITA- KEN: 1 ♁ 1 ♀, Kuro-dake, Kujû, 17.vi.1990, S. Ogata leg. ( KUM); 1 ♀, Kuro-dake Kujû, 5.vii.1997, S. Ogata leg. ( KUM); 3 ♀♀, Kujû Kuro-dake, 3.x.1983, R. Noda leg.( KUM); 1 ♁ 2 ♀♀, Chôjabaru Kujû, Kokonoe-machi, 8.ix.1987, Y.Abe leg.( KUM); 2 exs., “Mujyu San” (probably Kujû), Kuro-dake, 26.vi.1993, S. Ohmomo leg. (cSch).

Diagnosis. Tachinus (Tachinus) obesus is similar to T. (Tachinus) japonicus , but can be distinguished by broader parameres of aedeagus and slenderer lobes of female tergite VIII. For detailed redescription, see LI (1995a: 66). Biology. In western mainland Japan, this species is commonly found around mushrooms in montane zones. Distribution. Japan (Honshu, Shikoku, Kyushu).

Figures

Fig. 3. A–C, E–L – Tachinus (Tachinus) dujieae sp. nov. D – Tachinus (Tachinus) rishirianus Watanabe & Shibata, 1965. A – male; B – female; C–D – microsculpture of elytra; E – male sternite VII; F – male tergite VIII; G – male sternite VIII; H – aedeagus in lateral view; I – aedeagus in ventral view; J – female tergite VIII; K – female sternite VIII; L – female abdominal segments IX–X and spermatheca. Scale bars = 1.0 mm for A–B, E; 0.2 mm for C–D; 0.5 mm for F–L.