Three new species of Hygrodromicus Tronquet, 1981 (Coleoptera: Staphylinidae Omaliinae: Anthophagini) from China Cheng, Zhi-Fei Pan, Zhao-Hui Li, Li-Zhen Peng, Zhong Zootaxa 2021 2021-04-16 4963 1 138 148 8Y4TH Cheng, Li & Peng Cheng, Li & Peng 2021 [151,689,402,429] Insecta Staphylinidae Hygrodromicus GBIF Animalia Coleoptera 4 142 Arthropoda species danlangi sp. nov.   Type material( 12 ♂♂, 17 ♀♀).  Holotype:  ♂‘ China: Xizang, Linzhi City, Gongbujiangda County[工布江ffi县], near Gaduogang Village[ḋľÑ村], 29°53′60″N, 93°14′22″E, alt.  3620 m,  18.vii.2018, Cheng, Peng& Shenleg./ HOLOTYPE<red rectangular label, printed>  ♂,  H. danlangi  sp. n., det. Cheng, Li& Peng, 2021, SNUC’ ( SNUC).   Paratypes: 2 ♂♂, 2 ♀♀: same data as the holotype ( SNUC);  8 ♂♂, 15 ♀♀‘ China: Xizang, Linzhi City, BayiDis- trict [巴fi区], near Chongzhe Village[AEẼ村], 29°34′31″N, 94°23′01″E, alt.  3230 m,  03.VII.2018, Cheng, Peng& Shenleg.’ ( SNUC);  1 ♂, ‘ China: Yunnan Prov., Lushui Co., Pianma, Changyanhe, riverside, 25.994°N, 98.66336°E,  2454 m,  2005. V.15day, Liang H.B.collector California Academy & IOZ., Chinese. Acad. Sci.’ ( SNUC);  All paratypeswith label: ‘ PARATYPE<yellow rectangular, printed> ♂[or ♀],  H. danlangi  sp. n., det. Cheng, Li & Peng, 2021, SNUC’.   Description.Measurements (in mm) and ratios: BL 4.50–6.17; FL 2.78–3.61; HL 0.61–0.83; HW 0.78‒1.00; PL 0.78‒0.95; PWb 0.83–1.06; PWm 0.97‒1.28; EL 1.28‒1.95; EW 1.61‒2.06; AnL 2.89–3.35; AeL 0.93‒0.99; HL/HW 0.61‒1.00; PL/PWm 0.74‒0.84; EL/EW 0.77‒0.95. In external appearance, shape and coloration of body (Fig. 3A) similar to  H. carbonarius  sp. n. Head as in Fig. 3B; vertex distinctly transverse, with distinct deep U-shaped impression between eyes; frons between supra-anternnal tubercles slightly impressed; clypeus short and narrow, weakly convex; eyes moderately prominent, about twice as long as temples ( holotype); ocelli very small and indistinct, distance between ocelli almost equal to distance between ocellus and posterior margin of eye ( holotype). Vertex and frons covered with coarse and dense punctures, and reticular microsculpture. Pubescence on head long, dense and decumbent in anterior portion. Labrum (Fig. 3D) subrectangular in dorsal view, with broad emargination anteriorly. Mandibles (Figs 3E–F) subtriangular, each with broadly emarginated apex, and curved distal tooth; right and left mandibles both lacking small subtriangular teeth on inner margins near middle; prostheca with short and dense pubescence from base to above middle of mandible. Maxilla as in Fig. 3G. Labium as in Fig. 3H. Antennae as in Fig. 3C; length × width (in mm) of antennomeres 1–11 ( holotype): 0.26 × 0.13: 0.17 × 0.10: 0.19 × 0.10: 0.22 × 0.09: 0.25 × 0.09: 0.26 × 0.10: 026 × 0.10: 0.26 × 0.10: 0.23 × 0.10: 0.25 × 0.10: 0.34 × 0.11. Male. Apical margin of abdominal tergite VIII (Fig. 3I) straight; apical margin of abdominal strernite VIII (Fig. 3J) broadly emarginated. Aedeagus as in Figs 4A–C, median lobe deeply emarginated in lateral margins near anterior third; parameres slighly asymmetrical, slender, distinctly exceeding apex of median lobe, each bearing four apical setae; internal sac complicated, with elongate membranous structures and long flagellum. Female. Apical margin of abdominal sternite VIII without emargination.  Comparative notes.Regarding the external morphology,  H. danlangi  sp. n.is similar to  H. carbonarius  sp. n., but differs by shapes of the pronotum and the labrum, the absence of additional small tooth in inner margin of mandibles, and the shape of apical portion of the aedeagus.   Distribution.Southwestern China: Xizang, Yunnan( Fig. 7).  Bionomics.Specimens were collected in the same ecological condition together with  H. carbonariuss p. n.(see above) in Gongbujiangda County of Xizang. Several specimens were collected in the neighboring Bayi District of Xizang( Fig. 8).   Etymology.The species is named after Danlang, who lent extensive support to our research. FIGURE 3.  Hygrodromicus danlangi sp. n., male. Habitus of male in dorsal view (A); head in dorsal view (B); left antenna (C); labrum in dorsal view (D); left maxilla in ventral view (G); right (E) and left (F) mandibles in dorsal view; labium in ventral view (H); abdominal sternite VIII (I) and tergite VIII (J). Scale bar: 2.0 mm in A; 1.0 mm in C; 0.30 mmin B; 0.10 mmin D–J. 3091101308 2018-07-18 Cheng, Peng & Shen China Gongbujiangda County 3620 29.9 Gaduogang Village 20 93.23944 Linzhi City 4 142 1 1 Xizang holotype 3091101303 [665,1433,583,609] SNUC China Cheng & Li & Peng 4 142 1 1 Xizang holotype 3091101305 [151,831,619,645] SNUC China Cheng & Li & Peng 4 142 4 2 2 Xizang paratype 3091101309 2018-07-03 SNUC Cheng, Peng & Shen China Linzhi City 3230 29.57528 Chongzhe Village 20 94.383606 Bayi 4 142 23 15 8 Xizang paratype 3091101313 2005-05-15 V, SNUC Liang H. B. & Chinese. Acad. Sci. China Lushui Co. 2454 25.994 Changyanhe 55 98.66336 Pianma 4 142 1 1 Yunnan paratype 3091101301 China All 4 142 1 Yunnan paratype