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