Notes on the genus Rhyncocheilus in China (Coleoptera, Staphylinidae Staphylininae) with descriptions of three new species Author Tang, Liang College of life sciences, Shanghai Normal University, 100 Guilin Road, 1 Educational Building 323 Room, Shanghai, 200234 P. R. China. Author Schillhammer, Harald Naturhistorisches Museum, Burgring 7, A- 1010 Wien, Austria. Author Zhao, Xin 0000-0001-8144-9288 College of life sciences, Shanghai Normal University, 100 Guilin Road, 1 Educational Building 323 Room, Shanghai, 200234 P. R. China. & 2431832783 @ qq. com; https: // orcid. org / 0000 - 0001 - 8144 - 9288 2431832783@qq.com text Zootaxa 2021 2021-03-18 4948 1 99 112 journal article 7556 10.11646/zootaxa.4948.1.5 9071bf14-8c4a-4e46-8ce8-2d1171712022 1175-5326 4616173 EE775F60-7A04-4DBF-AE0E-C1C4F4F7F030 Rhyncocheilus griseosericans ( Fairmaire, 1894 ) ( Figs 7, 8 , 22–24 , 42–49) Emus griseosericans Fairmaire, 1894: 217 . Rhyncocheilus griseosericans : Coiffait, 1974: 383 ; Schillhammer; 2012: 199. Material examined. China : Sichuan : 1³ 6♀♀ , Tianquan County , Erlangshan , alt. 2000 m , 15–21.VIII.2011 , Huang Hao leg. ( SHNU ) ; 3³³ 2♀♀ , Emei Mt. , Jiulinggang , 29°34′N , 103°21′E , alt. 1900–2000 m , 1–9.VIII.2012 , Huang Hao leg. ( SHNU , NMW ) ; 2³³ 4♀♀ , Emeishan Mt. , Jiulinggang , 29°34′N , 103°21′E , alt. 1900 m , 25.VII.2012 , Peng , Dai & Yin leg. ( SHNU ) ; 1♀ , Emeishan Mt. , Huayanding , 29°33′N , 103°21′E , alt. 1900 m , 22.VII.2012 , Peng , Dai & Yin leg. ( SHNU ) . Measurements. Male: BL: 15.7–21.4 mm , FL: 11.0– 12.1 mm . HL: 2.89–3.17 mm , HW: 2.89–3.06 mm , EYL: 1.00– 1.22 mm , TL: 1.22–1.45 mm , PL: 2.78–2.89 mm , PW: 2.78–2.95 mm , EL: 4.56–5.34 mm , EW: 4.78–5.45 mm . HW/HL: 0.95–1.04, TL/EYL: 1.09–1.44, PL/PW: 0.94–1.00, EL/EW: 0.84–1.01. Female: BL: 19.0– 26.1 mm , FL: 12.3–14.7 mm . HL: 3.39–3.89 mm , HW: 3.22–3.56 mm , EYL: 1.00– 1.22 mm , TL: 1.72–2.00 mm, PL: 3.11–3.61 mm , PW: 3.22–3.67 mm , EL: 5.56–6.17 mm , EW: 5.17–6.39 mm . HW/HL: 0.87–0.97, TL/EYL: 1.52–1.83, PL/PW: 0.95–1.02, EL/EW: 0.93–1.09. Distribution. China ( Sichuan ). Diagnosis. The species was described from a single female from Ya’an, and the detailed locality is unknown. The locality, Erlangshan of Tianquan County, is very close to Ya’an, and the specimens from there do not differ from the holotype in appearance. Therefore, we regard the specimens listed here as true Rhyncocheilus griseosericans ( Fairmaire, 1894 ) . The specimens from Emeishan of Sichuan are identical to those from Erlangshan of Tianquan County externally, though the apical portion ( Fig. 48 ) of aedeagal median lobe is somewhat different, which may be considered to be within the variability range of the species. Schillhammer (2012) redescribed R. griseosericans based on the holotype and specimens from Hailuogou of Sichuan , however, those specimens from Hailuogou belong to a new species which is described herein as Rhyncocheilus gonggashanus sp. nov. For differences between those two species see the comparative description below. Rhyncocheilus griseosericans ( Fairmaire, 1894 ) is also very similar in appearance to R. sommersgutteri Schillhammer, 2004 described from Liziping of Sichuan , except for the darker body color and the shorter silvery pubescent patches on the elytra.