Tachinus (Tachinus) rishirianus

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) rishirianus

Watanabe & Shibata, 1965

[Japanese name: Kita-marukubi-hanekakushi]

( Fig. 2F , 3D )

Tachinus rishirianus Watanabe & Shibata, 1965: 322 (original description); VESELOVA (2011): 85 (as full species; Russia, Sakhalin).

Tachinus (Tachinus) pallipes rishirianus : ULLRICH (1975): 113 (as a subspecies of T. pallipes ); LI (1995a): 56 (redescription).

Material examined. JAPAN: HOKKAIDO: 2 ♁♁ 1 ♀, Nipesotsu-yama, Kamishihoro-chô, 4.viii.1990, K. Haga leg.( KUM); 1 ♁, Ishikari-dake, 7.vii.1992, K. Miyashita leg. ( KUM); 1 ♁, Ginsendai, Kamikawa-chô, 30.vi.2009, S. Hori leg. (cHor); 1 ♁, Aka-dake, Taisetsu, Kamikawa-chô, 20.vii.2004, S. Hori leg. (cHor).

Diagnosis. Tachinus (Tachinus) rishirianus can be distinguished from other members of the subgenus Tachinus from Japan by the combination of following characters: pronotum with distinct broadly yellow margins; male sternite VII with small field of modified setae restricted to the middle part of emargination; parameres of aedeagus with flattened apices in lateral view. This species is similar to T. (Tachinus) pallipes (Gravenhorst, 1806) , distributed in Europe, Russia, and China, but can be distinguished by the shorter flattened part of the parameres. For detailed redescription, see LI (1995a: 56).

Distribution. Japan (Hokkaido incl. Rishiri-tô Is., Rebun-tô Is.), Russia, Sakhalin.

Remarks. This species was recorded from Rebun-tô in YASUDA & SATO (1992) and from Sakhalin in VESELOVA (2011).

Figures

Fig. 2. Habitus of Tachinus spp.A – T. javanus Cameron, 1937; B – T. kinoshitai Li, 1995; C – T. mimulus Sharp, 1874; D – T. nakanei Ullrich, 1975; E – T. obesus Weise, 1877; F – T. rishirianus Watanabe & Shibata, 1965; G – T. subterraneoides Schülke & Hashizume, 2021; H – T. trifidus Sharp, 1888; I – T. yezoensis Li, 1995. Scale bars = 1.0 mm.

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.