taxonID	type	description	language	source
8B018790FF83A71BFF11FCC51EFF09D1.taxon	materials_examined	Material examined. Holotype: ♂, glued on a card with labels as follows: “ China: Sichuan, Dayi County, Xiling Xueshan, 30 ° 41 ' 59 '' N, 103 ° 12 ' 10 '' E, mixed leaf litter, sifted, 2150 m, 29. VII. 2015, Jiang, Peng, Tu & Zhou leg ”. “ Holotype / Stenus cariniventris / Tang, Liu & Dong ” [red handwritten label] (SHNU). Paratypes: 18 ♂♂ 15 ♀♀, same data as for the holotype. (SHNU, cPut); 2 ♂♂ 3 ♀♀, Sichuan, Mt. Qingchengshan, Baiyun Temple, 30 ° 56 ' N, 103 ° 28 ' E, alt. 1700 m, 30. VII. 2012, Peng, Dai & Yin leg. (SHNU); 2 ♂♂ 2 ♀♀, same locality, alt. 1650 m, 29. VII. 2012, Peng, Dai & Yin leg. (SHNU); 1 ♂ 1 ♀, same locality, alt. 1900 – 2000 m, 30. VII. 2012, Peng, Dai & Yin leg. (SHNU).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF83A71BFF11FCC51EFF09D1.taxon	description	Description. Brachypterous; head black, other body parts dark brown, each elytra with median portion inconspicuously to conspicuously lighter. Antennae, maxillary palpi and legs yellowish brown except antennal club infuscate. Labrum reddish brown. BL: 4.6 – 5.2 mm, FL: 2.0 – 2.3 mm. HW: 0.77 – 0.95 mm, PL: 0.64 – 0.75 mm, PW: 0.60 – 0.71 mm, EL: 0.65 – 0.78 mm, EW: 0.68 – 0.85 mm, SL: 0.50 – 0.60 mm. Head 1.08 – 1.16 times as wide as elytra; interocular area with two deep longitudinal furrows, median portion convex, reaching the level of inner eye margins; punctures round, slightly larger and sparser on median portion than those near inner margins of eyes, diameter of large punctures about as wide as apical cross section of antennal segment II; interstices smooth, narrower than half the diameter of punctures except those along the midline of the median portion, which may be 1.5 – 2 times wider than the diameter of punctures. Paraglossae oval. Pronotum 1.01 – 1.08 times as long as wide; disk uneven, with distinct median longitudinal furrow almost throughout, two shallow impressions in anterior half, two shallow impressions in about middle, two shallow impressions in posterior half; punctures confluent, slightly larger in size than those of head; interstices smooth, much narrower than half the diameter of punctures except for those in the middle of the median longitudinal furrow, which may be triple as wide as the diameter of punctures. Elytra 0.89 – 0.99 times as long as wide; disk uneven with deep longitudinal humeral impression, distinct postero-lateral impression and distinct sutural impression, suture moderately convex; punctures longitudinally confluent, similar size to those on pronotum; interstices smooth, distinctly smaller than half the diameter of punctures. Legs with tarsomeres IV strongly bilobed. Abdomen cylindrical; paratergites very narrow and almost impunctate, present only in segment III, tergites and sternites totally fused in segments IV – VI, posterior margin of tergite VII with indistinct apical membranous fringe; punctation of tergites III – VIII sparse and shallow, gradually becoming smaller posteriad; interstices smooth, mostly wider than diameter of punctures except those on basal impressions of tergites III – V, which may be distinctly narrower than half the diameter of punctures. FIGURES 1 – 7. Habitus. 1 Stenus cariniventris 2 S. jiangrixini 3 S. lineatus 4 S. emeishanus 5 S. jiudingshanus 6 S. xichangensis 7 S. brevilineatus. Scale bars: 1 mm. Male. Sternite VII with posteromedian portion slightly impressed; sternite VIII (Fig. 8) with distinct semicircular emargination at middle of posterior margin; sternite IX (Fig. 9) with long apicolateral projections, posterior margin serrate. Aedeagus (Figs. 10 – 12) with median lobe varied in width, apical sclerotized area triangular with mid ridge (Fig. 13) strongly convex and varied in width (Figs 10, 11); expulsion clasps very large, strongly sclerotized; parameres indistinctly shorter than median lobe, swollen at apical parts, each with 10 – 13 setae on apico-internal margins. Female. Sternite VIII (Fig. 14) entire; strongly sclerotized spermatheca (Fig. 15) with basal porch and spermathecal duct bent twice.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF83A71BFF11FCC51EFF09D1.taxon	distribution	Distribution. China (Sichuan).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF83A71BFF11FCC51EFF09D1.taxon	discussion	Remarks. The species can be distinguished from other species by the following characters: body size larger, surfaces of pronotum and elytra rather uneven and the distinctly median longitudinal furrow of pronotum.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF83A71BFF11FCC51EFF09D1.taxon	etymology	Etymology. The specific name is derived from the presence of mid ridge on apical portion of aedeagal median lobe.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF81A71CFF11F9511EDF0ACC.taxon	materials_examined	Material examined. Holotype: ♂, glued on a card with labels as follows: “ China: Sichuan, Dayi County, Xiling Xueshan, 30 ° 41 ' 59 '' N, 103 ° 12 ' 10 '' E, mixed leaf litter, sifted, 2150 m, 29. VII. 2015, Jiang, Peng, Tu & Zhou leg ”. “ Holotype / Stenus jiangrixini / Tang, Liu & Dong ” [red handwritten label] (SHNU). Paratypes: 1 ♀, same data as for the holotype. (SHNU).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF81A71CFF11F9511EDF0ACC.taxon	description	Description. Brachypterous; head black, pronotum and elytra brown, each elytra with a small indistinct spot on median portion? abdomen dark brown. Antennae, maxillary palpi and legs yellowish brown except antennal club infuscate. Labrum reddish brown. BL: 4.0 – 4.1 mm, FL: 1.9 – 2.0 mm. HW: 0.71 – 0.76 mm, PL: 0.57 – 0.59 mm, PW: 0.54 – 0.57 mm, EL: 0.60 – 0.64 mm, EW: 0.61 – 0.67 mm, SL: 0.42 – 0.44 mm. Head 1.14 – 1.17 times as wide as elytra, pronotum 1.03 – 1.05 times as long as wide, elytra 0.96 – 0. 98 times as long as wide; Similar to S. cariniventris sp. n. in most aspects, but differs in the following characters: punctation of pronotum and elytra more confluent; pronotal impressions deeper and elytral impressions shallower; elytra each with a hump at elytral spot; abdominal segment IV with traces of degenerated paratergites on basal fourth; abdominal tergites with punctures smaller and sparser especially those of posterior area of each tergite. Male. Sternite VII with posteromedian portion slightly impressed; sternite VIII (Fig. 16) emarginated at middle of posterior margin with anterior margin of the emargination straight; sternite IX (Fig. 17) with very long and strong apicolateral projections. Aedeagus (Figs. 18, 19) with apical sclerotized portion roundly projected at apex; expulsion clasps large, strongly sclerotized; parameres as long as the median lobe, each with 8 – 10 setae on apicointernal margins. Female. Sternite VIII (Fig. 20) with posterior margin weakly pointed at middle; sclerotized spermatheca (Fig. 21) with very complicated bends.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF81A71CFF11F9511EDF0ACC.taxon	distribution	Distribution. China (Sichuan).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF81A71CFF11F9511EDF0ACC.taxon	discussion	Remarks. The new species is similar to S. cariniventris sp. n., but differs in smaller body size, the appearance of small and prominent elytral spots, smaller and sparser punctation of abdominal tergites.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF81A71CFF11F9511EDF0ACC.taxon	etymology	Etymology. This species is named in honor of Mr. Ri-Xin Jiang who collected some specimens of the new species.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF87A71EFF11FF341ED60A33.taxon	materials_examined	Material examined. Holotype: ♂, glued on a card with labels as follows: “ China: Sichuan Prov., Qingchengshan Mt., Baiyun Temple, 30 ° 56 ' N, 103 ° 28 ' E, alt. 1650 m, 29. VII. 2012, Peng, Dai & Yin leg ”. “ Holotype / Stenus lineatus / Tang, Liu & Dong ” [red handwritten label] (SHNU). Paratypes: 1 ♂ 1 ♀, same data as for the holotype. (SHNU).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF87A71EFF11FF341ED60A33.taxon	description	Description. Brachypterous; head blackish, rest parts dark brown. Antennae, maxillary palpi and legs yellowish brown except antennal club infuscate. Labrum reddish brown. BL: 4.1 – 4.3 mm, FL: 2.0 mm. HW: 0.77 – 0.84 mm, PL: 0.59 – 0.65 mm, PW: 0.58 – 0.65 mm, EL: 0.64 – 0.67 mm, EW: 0.71 – 0.79 mm, SL: 0.47 – 0.49 mm. Head 1.06 – 1.08 times as wide as elytra; interocular area with two deep longitudinal furrows, median portion convex, reaching the level of inner eye margins; punctures round, slightly larger and sparser on median portion than those near inner margins of eyes, diameter of large punctures about as wide as apical cross section of antennal segment II; interstices smooth, mostly narrower than half the diameter of punctures except those along the midline of the median portion, which may be as wide as the diameter of punctures. Paraglossae oval. Pronotum 0.91 – 1.03 times as long as wide; disk uneven, with distinct median longitudinal furrow which is about 1 / 2 the length of pronotum; punctures rugose and confluent, varied in size, slightly larger than those of head in average; interstices smooth, much narrower than half the diameter of punctures except for those in the middle of the median longitudinal furrow, which may be wider than the diameter of punctures. Elytra 0.85 – 0.89 times as long as wide; disk relatively even; punctures moderately confluent, slightly larger than those of pronotum; interstices smooth, distinctly smaller than half the diameter of punctures. Legs with tarsomeres IV strongly bilobed. Abdomen cylindrical; paratergites very narrow with few puncures, present in segments III – VI, posterior margin of tergite VII without indistinct apical membranous fringe; interstices smooth, mostly wider than diameter of punctures except those on basal impressions of tergites III – V, which may be distinctly narrower than half the diameter of punctures. Male. Sternites VI and VII with posteromedian porion flattened; sternite VIII (Fig. 22) with distinct semicircular emargination at middle of posterior margin; sternite IX (Fig. 23) with long apicolateral projections, posterior margin serrate. Aedeagus (Figs. 24 – 25) with apical sclerotized area triangular with a sharp projection at apex, median lobe with two pairs of short subapical setae; expulsion clasps large, strongly sclerotized; parameres as long as the median lobe, flattened subapically, each with 23 – 26 setae on apico-internal margins. Female. Sternite VIII (Fig. 26) with posterior margin weakly pointed at middle; sclerotized spermatheca (Fig. 27) with folded bends.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF87A71EFF11FF341ED60A33.taxon	distribution	Distribution. China (Sichuan).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF87A71EFF11FF341ED60A33.taxon	discussion	Remarks. The new species can be readily distinguished from other Chinese species of the cirrus group by presence of the paratergites in abdominal segments III – VI except S. huangganmontium Puthz, 2003 from Fujian and S. cirrus L. Benick, 1940 from Zhejiang, and it can be easily distinguished from the latter two species by larger body size.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF87A71EFF11FF341ED60A33.taxon	etymology	Etymology. The specific name is derived from the presence of narrow paratergites in abdominal segments III – VI.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF84A71FFF11FC2F1A0C08D4.taxon	materials_examined	Material examined. Holotype: ♂, glued on a card with labels as follows: “ China: Sichuan Prov., Emeishan Mt., Xianfeng Temple, 29 ° 33 ' N, 103 ° 21 ' E, alt. 1550 – 1700 m, 25. VII. 2012, Peng, Dai & Yin leg ”. “ Holotype / Stenus emeishanus / Tang, Liu & Dong ” [red handwritten label] (SHNU). Paratypes: 2 ♂♂ 6 ♀♀, same data as for the holotype. (SHNU, cPut); 1 ♀, Hongchunping Temple, 29 ° 33 ' N, 103 ° 22 ' E, alt. 1100 m, 27. VII. 2012, Peng, Dai & Yin leg. (SHNU); 1 ♂, Wannian, alt. 1050 m, 19 – 30. III. 1999, W. Schawaller leg. (SMNS).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF84A71FFF11FC2F1A0C08D4.taxon	description	Description. Brachypterous; head blackish, pronotum and elytra brownish, abdomen dark brown, each elytron with an elongated orange spot near lateral margin. Antennae, maxillary palpi and legs yellowish brown except antennal club infuscate. Labrum reddish brown. BL: 3.7 – 4.9 mm, FL: 1.8 – 2.1 mm. HW: 0.78 – 0.86 mm, PL: 0.62 – 0.67 mm, PW: 0.58 – 0.65 mm, EL: 0.67 – 0.73 mm, EW: 0.72 – 0.80 mm, SL: 0.50 – 0.56 mm. Head 1.04 – 1.11 times as wide as elytra; interocular area with two deep longitudinal furrows, median portion convex, reaching the level of inner eye margins; punctures round, distinctly larger on median portion than those near inner margins of eyes, diameter of large punctures slightly wider than apical cross section of antennal segment II; interstices smooth, distinctly narrower than half the diameter of punctures. Paraglossae oval. Pronotum 1.01 – 1.07 times as long as wide; disk relatively even, with indistinct median longitudinal furrow; punctures confluent, varied in size, slightly larger than those of head; interstices smooth, much narrower than half the diameter of punctures except for those along the midline, which may be as wide as the diameter of punctures. Elytra 0.92 – 0.95 times as long as wide; disk relatively even with shallow impression along the inner side of elytral spot; punctures slightly confluent, of similar size to those of pronotum; interstices smooth, distinctly smaller than half the diameter of punctures. Legs with tarsomeres IV strongly bilobed. Abdomen cylindrical; paratergites very narrow with few punctures, present only in segment III, tergites and sternites totally fused in segments IV – VI, posterior margin of tergite VII with indistinct apical membranous fringe; punctation of tergites III – VIII sparse and shallow, gradually becoming smaller posteriad; interstices smooth, mostly wider than diameter of punctures except those on basal impressions of tergites III – V, which may be distinctly narrower than half the diameter of punctures. Male. Sternite VIII (Fig. 28) with shallow emargination at middle of posterior margin; sternite IX (Fig. 29) with long apicolateral projections, posterior margin serrate. Aedeagus (Fig. 30 – 31) with apical sclerotized portion triangular and roundly projected at apex; expulsion clasps large, strongly sclerotized; parameres longer than median lobe, each with 9 – 11 setae on apico-internal margins. Female. Sternite VIII (Fig. 32) entire; sclerotized spermatheca (Fig. 33) simple consisting of basal duct, swollen spermatheca duct.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF84A71FFF11FC2F1A0C08D4.taxon	distribution	Distribution. China (Sichuan).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF84A71FFF11FC2F1A0C08D4.taxon	discussion	Remarks. The new species share the same appearance with S. cooterianus Puthz, 2003 from Fujian, and the identification of them should be based on dissection and the information of locality.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF84A71FFF11FC2F1A0C08D4.taxon	etymology	Etymology. The specific name is derived from the type locality of this species.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF85A711FF11F9171A0C0861.taxon	materials_examined	Material examined. Holotype: ♂, glued on a card with labels as follows: “ Ganlong Chi (2500 – 2750 m). Mt. Jiuding Shan (Chaping Shan Mts). Mao Xian, Sichuan prov. SE China. 23. IX. 1996. S. Nomura. coll. Watanabe ”. “ Holotype / Stenus jiudingshanus / Tang, Liu & Dong ” [red handwritten label] (cWat). Paratypes: 1 ♂ 2 ♀♀, same data as for the holotype. (cWat, SHNU).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF85A711FF11F9171A0C0861.taxon	description	Description. Brachypterous; Head black, rest parts reddish brown with elytra slightly lighter. Antennae, maxillary palpi yellowish brown except antennal club infuscate, legs reddish yellow. BL: 3.2 – 3.3 mm, FL: 1.5 mm. HW: 0.68 – 0.73 mm, PL: 0.50 – 0.53 mm, PW: 0.49 – 0.53 mm, EL: 0.52 – 0.54 mm, EW: 0.58 – 0.64 mm, SL: 0.39 – 0.42 mm. Head 1.11 – 1.16 times as wide as elytra; interocular area with two deep longitudinal furrows, median portion convex, reach the level of inner eye margins; punctures roundand almost uniformed, diameter of punctures slightly wider than apical cross section of antennal segment II; interstices smooth, mostly narrower than half the diameter of punctures except few along the midline of the posterior median portion, which may be wider than the diameter of punctures. Paraglossae oval. Pronotum 0.98 – 1.02 times as long as wide; disk uneven, with distinct median longitudinal furrow; two shallow impressions in anterior half, two shallow impressions in about middle and two shallow impressions in posterior half; punctures strongly confluent, similar size to those of head; interstices smooth, much narrower than half the diameter of punctures except in median furrow, which may be twice as wide as the diameter of punctures. Elytra 0.85 – 0.92 times as long as wide; disk uneven with distinct longitudinal humeral impression, distinct postero-lateral impression and distinct long sutural impression, suture convex; punctures confluent, of similar size to those of pronotum; interstices smooth, much narrower than half the diameter of punctures. Legs with tarsomeres IV strongly bilobed. Abdomen cylindrical; paratergites very narrow with few punctures, present only in segment III, tergites and sternites totally fused in segments IV – VI, posterior margin of tergite VII with indistinct apical membranous fringe; punctation round, clear and relatively dense; interstices smooth, narrower than half the diameter of punctures to narrower than diameter of punctures. Male. Sternite VIII (Fig. 34) with shallow emargination at middle of posterior margin; sternite IX (Fig. 35) with long apicolateral projections. Aedeagus (Figs. 36 – 37) with median lobe robust, apical sclerotized area triangular and roundly projected at apex; expulsion clasps large; parameres longer than median lobe, swollen at apical parts, each with 8 – 10 setae on apico-internal margins. Female. Sternite VIII entire; spermatheca (Fig. 38) strongly sclerotized, spermathecal (Fig. 39) duct consisting of basal duct and complicatedly folded spermatheca duct.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF85A711FF11F9171A0C0861.taxon	distribution	Distribution. China (Sichuan).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF85A711FF11F9171A0C0861.taxon	discussion	Remarks. The species can be readily distinguished from other species of the cirrus group by small body size and the coloration.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF85A711FF11F9171A0C0861.taxon	etymology	Etymology. The specific name is derived from the type locality of this species.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF8BA711FF11FE141A0C0EB3.taxon	materials_examined	Material examined. Holotype: ♂, glued on a card with labels as follows: “ China S. Sichian. S. Xichang, Mt. Luoji, alt. 2300 – 2500 m, litter. 16 - 24. VII. 1996, Kurbatov leg ”. “ Holotype / Stenus xichangensis / Tang, Liu & Dong ” [red handwritten label] (MHNG). Paratypes: 1 ♂, same data as for the holotype. (MHNG).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF8BA711FF11FE141A0C0EB3.taxon	description	Description. Brachypterous; head reddish brown posterior portion along the inner eye margins darker, pronotum and elytra reddish brown with midline broadly darker, abdomen dark with lateral portions lighter. Antennae, maxillary palpi and legs yellowish brown except antennal club and tarsomeres I – IV infuscate. BL: 4.1 – 4.5 mm, FL: 1.8 – 1.9 mm. HW: 0.81 mm, PL: 0.63 mm, PW: 0.69 mm, EL: 0.62 – 0.64 mm, EW: 0.82 – 0.85 mm, SL: 0.47 – 0.48 mm. Head 0.96 – 0.99 times as wide as elytra; interocular area with two deep longitudinal furrows, median portion convex, slightly extending beyond the level of inner eye margins; punctures round, more or less confluent, similar in size, diameter of punctures about as wide as apical cross section of antennal segment II; interstices mostly smooth, few reticulated, much narrower than half the diameter of punctures except those along the midline of the convex median portion, which may be as wide as diameter of punctures. Paraglossa oval. Pronotum 0.90 times as long as wide; disk uneven, with distinct median longitudinal furrow, two impressions in anterior half, transverse impression in the middle, and two impressions in posterior half, four humps near lateral sides of the anterior and posterior impressions distinct; punctures strongly confluent, slightly smaller than those of head; interstices ridge like, reticulated (in another specimen, interstices at the central of median longitudinal furrow smooth), mostly narrower than half the diameter of punctures except those in median area, which may be as wide as diameter of punctures (in another specimen, three times wider than diameter of punctures). Elytra 0.75 – 0.76 times as long as wide; disk uneven with distinct longitudinal humeral impression, distinct postero-lateral impression and long sutural impression, suture moderately convex; punctation longitudinally confluent, a little larger than those of pronotum, interstices similar to those of pronotum. Legs rather stout with tarsomeres IV deeply bilobed. Abdomen cylindrical; paratergites very narrow and almost impunctate, present only in segment III, tergites and sternites totally fused in segments IV – VI though traces of degenerated paratergites can be recognized in basal half of segments IV and V; posterior margin of tergite VII without apical membranous fringe; punctation round and shallow, gradually becoming smaller and sparser posteriad; interstices smooth on tergites III – VIII and reticulated on last two tergites, mostly narrower than diameter of punctures and those on basal impressions of tergites III – V could be distinctly narrower than half the diameter of punctures. Male. Sternite VII with emargination at middle of posterior margin and a distinct impression before it; sternite VIII (Fig. 40) with distinct semi-circular emargination at middle of posterior margin; sternite IX (Fig. 41) with long apicolateral projections, posterior margin strongly serrate. Aedeagus (Figs. 42 – 43) with median lobe robust, apical sclerotized area roundly poited at apex with a broad mid groove; expulsion plate with two posterior projections; parameres slightly shorter than median lobe, swollen and folded at apical fourth, each with 15 – 18 setae on apicointernal margins. Female. Unknown.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF8BA711FF11FE141A0C0EB3.taxon	distribution	Distribution. China (Sichuan).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF8BA711FF11FE141A0C0EB3.taxon	discussion	Remarks. The species can be readily distinguished from other species of the cirrus group by sturdy body form and the unique coloration.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF8BA711FF11FE141A0C0EB3.taxon	etymology	Etymology. The specific name is derived from the type locality of this species.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF88A713FF11FACC1FB40AA1.taxon	materials_examined	Material examined. Holotype: ♂, glued on a card with labels as follows: “ CHINA: W - Sichuan, Ya’an Pref, Tianquan Co, Jiajin Shan, valley above Labahe, N. R. Station, 57 km, W-Ya’an, 36.06.63 N, 102.25.18 E, light forest, 1800 m, 12. VII. 1999, leg. A. Pütz, Sammlung, Andreas Pütz, Eisenhuttenstadt. coll. Pütz ”. “ Holotype / Stenus brevilineatus / Tang, Liu & Dong ” [red handwritten label] (cPüt). Paratypes: 1 ♀, same data as for the holotype. (cPüt).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF88A713FF11FACC1FB40AA1.taxon	description	Description. Brachypterous; body blackish with pronotum and elytra inditinctly lighter. Antennae, maxillary palpi and legs yellowish brown except antennal club infuscate. Labrum reddish brown. BL: 4.2 – 4.6 mm, FL: 1.9 – 2.3 mm. HW: 0.78 – 0.90 mm, PL: 0.59 – 0.70 mm, PW: 0.62 – 0.72 mm, EL: 0.78 – 0.92 mm, EW: 0.82 – 1.01 mm, SL: 0.57 – 0.69 mm. Head 0.90 – 0.95 times as wide as elytra; interocular area with two deep longitudinal furrows, median portion moderately convex, extending beneath the level of inner eye margins; punctures rather confluet, similar in size, diameter of punctures about as wide as apical cross section of antennal segment II; interstices smooth, distinctly narrower than half the diameter of punctures. Paraglossae oval. Pronotum 0.95 – 9.97 times as long as wide; disk uneven, with distinct median longitudinal furrow which is about 2 / 3 the length of pronotum; punctures very confluent, varied in size, mostly similar to those of head; interstices ridge like and indistinctly sculptured, much narrower than half the diameter of punctures except for those in the middle of the median longitudinal furrow, which may be twice as wide as the diameter of punctures. Elytra 0.93 – 0.94 times as long as wide; disk relatively even; punctures strongly confluent, slightly larger than those of pronotum; interstices similar to those of pronotum. Legs with tarsomeres IV strongly bilobed. Abdomen cylindrical; paratergites very narrow and almost impunctate, present only in segments III and IV, sutures between tergites and sternites present in rest segments; punctation elliptic? thick on tergite III and basal portion of tergites IV and V, gradually becoming very small and sparser posteriad; interstices smooth, as wide as to far more wider than diameter of punctures except those on tergite III and basal portion of tergites IV and V, which may be distinctly narrower than half the diameter of punctures. Male. Sternite VIII (Fig. 44) with distinct emargination at middle of posterior margin; sternite IX (Fig. 45) with distinct apicolateral projections, posterior margin nearly straight. Aedeagus (Figs. 46, 47) with apical sclerotized area triangular; expulsion clasps large, strongly sclerotized; parameres longer than the median lobe, each with 21 – 22 setae on apico-internal margins. Female. Sternite VIII (Fig. 48) entire; sclerotized spermatheca (Fig. 49) with long folded bends.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF88A713FF11FACC1FB40AA1.taxon	distribution	Distribution. China (Sichuan).	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF88A713FF11FACC1FB40AA1.taxon	discussion	Remarks. The new species is similar to S. lineatus sp. n., but can be easily distinguished from the latter species by more confluent punctation of forebody, longer elytra and the absence of paratergites on abdominal segments V and VI.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
8B018790FF88A713FF11FACC1FB40AA1.taxon	etymology	Etymology. The specific name is derived from the presence of narrow paratergites in first two visible abdominal segments.	en	Tang, Liang, Liu, Sheng-Nan, Dong, Xin-Yu (2018): Seven new species of the Stenus cirrus group (Coleoptera, Staphylinidae) from Sichuan, Southwest China. Zootaxa 4425 (3): 527-540, DOI: 10.11646/zootaxa.4425.3.6
