Tachinus (Tachinoderus) nigriceps nigriceps Sharp, 1888

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 : 126

Tachinus (Tachinoderus) nigriceps nigriceps Sharp, 1888

[Japanese name: Kurozu-marukubi-hanekakushi]

( Fig. 1F )

Tachinus nigriceps Sharp, 1888: 384 (original description); LI (1995b): 209 (redescription).

Tachinus (Tachinoderus) nigriceps nigriceps : ULLRICH (1975): 315 (in part).

Tachinus (Tachinoderus) rubricollis : VESELOVA (2011):74 (in part).

Tachinus sanguinithorax Bernhauer, 1939: 157 ; SCHȖLKE (2015): 7 (synonymized with T. nigriceps nigriceps ).

Type material studied. T. sanguinithorax : SYNTYPES: 1 ♁, “♁ / Oita (NO-Kiushiu) / Japan Reitter / sanguinithorax Bernh. Typus Tachinus / sanguinithorax Bernh. Typus Tachinus / Dr. M. Bernhauer 10.XI. donavit 1942 / ex coll. Scheerpeltz [blue] / TYPUS Tachinus sanguinithorax Bernhauer [red] / Tachinus (Tachinus) nigriceps (Sharp) det. M. Schülke 2007” ( NHMW); 1 ♀, “ ♀ / Oita (NO-Kiushiu) / Japan Reitter / sanguinithorax Bernh. Typus Tachinus / Dr. M. Bernhauer 10.XI. donavit 1942 / ex coll. Scheerpeltz [blue] / TYPUS Tachinus sanguinithorax Bernhauer [red] / Tachinus (Tachinus) nigriceps (Sharp) det. M. Schülke 2007” ( NHMW).

Additional material examined. JAPAN: HOKKAIDO: 1 ♀, Shoro, 4.viii.1979, Y. Kurosa leg. ( KUM); 1 ♀, Môrai-kaigan near Sapporo, 25.viii.1981, S. Morita leg. ( KUM); 1 ♁, Sumikawa, Minami-ku, Sapporo-shi, 18.v.2020, Y.Tasaku leg. ( KUM); 1 ♀, Esashi, Hakodate-shi, 4.vi.1977, N. Nishikawa leg. ( KUM); 1 ♀, Oakan-dake Akan N. P., 4.vii.1986, S. Nomura leg. ( KUM); 1 ♀, Akan lakeside, 3.vii.1986, S. Nomura leg. ( KUM); 1 ♁ 1 ♀, Hyotan-pond Akan N. P., 4.vii.1986, S. Nomura leg. ( KUM); 1 ♀, same data, but 25.vii.1986 ( KUM); 1 ♀, Kamishihoro, 5–12.vii.1989, K. Haga leg. ( KUM); 1 ♀, Koma-ga-dake, Oshima, 30.vi.1991, S. Nomura leg. ( KUM); 1 ♁, Nopporo F.P., Ebetsu-shi, 31.v.–13.vi.2000, S. Hori leg. ( KUM); 1 ♁ 1 ♀, Niyama, Nanae-chô, 7.ix.2020, Y. Tasaku leg. ( KUM); 1 ex., Nopporo Forest, Ebetsu-shi, x.–xi.2006, T. Lackner leg. (cSch); 1 ex., Nopporo, Shinrin Koen., Ebetsu-shi, 20.x.2007, T. Lackner leg. (cSch); 1 ex., Nopporo Forest Park, 24.v./ 5.vi.2008, T. Lackner leg. (cSch). HONSHU: AOMORI- KEN: 3 ♁♁ 2 ♀♀, Tomiyachi, Tsugaru-shi, 30.ix.1992, S. Nomura leg. ( KUM); 1 ♀, Toyokawa, Tsugaru-shi, 30.ix.1992, S. Nomura leg. ( KUM). IWATE- KEN: 1 ♁, Takadate Hraizumi, 2.x.1992, S. Nomura leg. ( KUM); 4 ♀♀, Yasuno, Hanamaki-shi, 2.x.1992, S. Nomura leg. ( KUM); 1 ♁ 1 ♀, Niizato, Tôno-shi, 1.x.1992, S. Nomura leg. ( KUM); 1 ♁, Ryôishi, Kamaishi-shi, 7.vi.2016, J. Ohnishi leg. ( KUM). MIYAGI- KEN: 1 ♁, Naya, Iwanuma-shi, 30.xi.1995, S. Nomura leg. ( KUM). YAMAGATA- KEN: 1 ♁ 1 ♀, Ochinome, Sakata-shi, 3.x.1992, S. Nomura leg. ( KUM). FUKUSHIMA- KEN: 1 ♁, Urabandai, 9.vii.1985, S. Nomura leg. ( KUM); 2 ♁♁ 1 ♀, Hiuchi-ga-take, Hinoemata-mura, 19.x.1996, Y. Hagiwara et al. leg. ( KUM); 1 ♁, Ochiai, Kôri-machi, 30.xi.1995, S. Nomura leg. ( KUM). IBARAKI- KEN: 1 ♁, Nakaminato, 8.iv.1978, M. Tao leg. ( KUM); 1 ♁, Iwane, Mito-shi, 1.xii.1995, S. Nomura leg. ( KUM). TOCHIGI- KEN: 2 ♁♁, Kawaji-onsen, Nikkô-shi, 30.x.2004, K. Takahashi leg. ( KUM). GUNMA- KEN: 1 ♀, Keizuru-yama, Katashina-mura, 13.vii.1996, K. Ishii et al. leg. ( KUM); 2 ♁♁ 7 ♀♀, Oze Moor, Katashina-mura, 23.x.1994, H. Sakayori leg. ( KUM). KANAGAWA- KEN: 2 ♀♀, Kawasaki-shi, 10.iv.1977, M. Tao leg. ( KUM); 2 ♀♀, Noborito Tama-gawa, 23.ix.1996, K. Kawada leg. ( KUM); 1 ♀, Zama-shi, 22.vii.1989, N. Nishikawa leg. ( KUM); 1 ♁ 2 ♀♀, Nenzaka port, Sagami-ko, Sagamihara-shi, 28.iv.1985, K. Haga leg. ( KUM). NIIGATA- KEN: 5 ♁♁ 5 ♀♀, The right bank of Uono-gawa just downstream of the bridge of Iiyama Line, Nagaoka-shi, 30.iv.1995, K. Haga leg. ( KUM); 1 ♁, Outer shore of the river island of the left side of Sinano-gawa, Ushigashima, Nagaoka-shi, 30.iv.1995, K. Haga leg. ( KUM). YAMANASHI- KEN: 1 ex., Oizumi-machi, near Yato (1300 m alt.), Hokuto-shi, 16.x.2004, P. Jałoszyński leg. (cSch). NAGANO- KEN: 1 ♁ 1 ♀, Komoro, 21.vii.1990, T. Takeda leg. ( KUM); 1 ♁ 1 ♀, Tobira-onsen, Matsumoto-shi, 5.iv.1993, S. Nomura leg. ( KUM); 3 ♁♁ 1 ♀, Saikawabashi, Azumino-shi, 5.iv.1993, S. Nomura leg. ( KUM); 1 ex., Tachiba-zawa (1650 m alt.), Hara-mura, 15.x.2006, P. Jałoszyński leg. (cJał). KYOTO- FU: 2 exs., Kyôto-shi, 27.iv.1974, H. Ôishi leg. ( KUM). NARA- KEN: 2 exs., 31.vii.1980, C. Besuchet leg. ( MHNG, cSch). OKAYAMA- KEN: 3 ♀♀, Wake-chô, 17.iv.1977, S. Naomi leg. ( KUM); 1 ♁, Hirose, 3.v.1977, S. Naomi leg. ( KUM). SHIKOKU: KAGAWA- KEN: 1 ♁, Minato, Minato-gawa-kako, Higashikagawa-shi, 8.x.2012, T. Taki leg. ( KUM). KYUSHU: FUKUOKA- KEN: 1 ♁ 2 ♀♀, Tenjinmori,Asakura-shi, xi.1992, S. Nomura leg. ( KUM); 1 ♀, Tanaka, 16.ii.1992, S. Nomura leg. ( KUM). MIYAZAKI- KEN: 3 ♁♁ 2 ♀♀, Miyanotani, Aya-machi, 8.ii.1994, S. Nomura leg. ( KUM); 1 ♁, Hagiwara, Miyazaki-shi, 8.ii.1994, S. Nomura leg. ( KUM).

Diagnosis. Tachinus (Tachinoderus) nigriceps is similar to T. (Tachinoderus) kobensis but can be distinguished by reddish yellow pronotum and shorter sclerotized tube of inner sclerite of aedeagus. For detailed redescription, see LI (1995b: 209, as T. nigriceps [no subspecific status]).

Distribution. Japan (Hokkaido, Honshu, Shikoku, Kyushu (incl. Tsushima Is.), Yaku-shima Is.).

Remarks. The record of this species from Tsushima is doubtful. VESELOVA (2011) illustrated the aedeagus of a specimen from Tsushima that is actually the aedeagus of T. kobensis . The specimen is probably the same that has been recorded from Tsushima by ULLRICH (1975) who synonymized T. kobensis with T. nigriceps nigriceps . VESELOVA (2011) recorded this species from Kunashiri-tô, also probably due to misidentification.

Two subspecies of Tachinus nigriceps are known. Tachinus nigriceps nigriceps known from Japan and surrounding islands, and T. nigriceps rubricollis Rambousek, 1921 from Far Eastern Russia, China, and South Korea. The presence (in T. nigriceps nigriceps ) or absence (in T. n. rubricollis ) of elytral microsculpture diagnose the subspecies. The possibility that these differences represent intraspecific variation, or that both taxa are separate species, has also been mentioned ( CHANG et al. 2019). As far as we have reviewed, we identify the Japanese specimen as T. nigriceps nigriceps because it has weak microsculpture throughout the elytra.

Figures

Fig. 1. Habitus of Tachinus spp.A – T. punctiventris Sharp, 1888; B – T. diminutus Sharp, 1888; C – T. iriomoensis Li, 1994; D – T. kobensis Cameron, 1933; E – T. naomii Li, 1994; F – T. nigriceps nigriceps Sharp, 1888; G – T. yamato (Hayashi, 2003); H – T. bidens Sharp, 1888; I – T. bipustulatus (Fabricius, 1792); J – T. elongatus Gyllenhal, 1810; K – T. gelidus Eppelsheim, 1893; L – T. japonicus Sharp, 1888. Scale bars = 1.0 mm.