taxonID	type	description	language	source
28530D12FFA8FFBBFF58AAB3635F0AF7.taxon	description	(Figs. 1 A, 2 A – E)	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA8FFBBFF58AAB3635F0AF7.taxon	materials_examined	Type material. Holotype: male (NKU: XJ 59), China, Zhejiang, Xianju, Danzhuxiang, 24. v. 2016, light trap, leg: X. Qi. Paratypes: one male (NKU: CBL 116) China, Guangdong, Shaoshan, Shixing, Chebaling National Nature Reserve, 1 – 11. xii. 2020, malaise trap, leg: L. R. Lu. One male (NKU: XJ 184) China, Zhejiang, Taizhou, Xianju, Kuocangshan, Canglingkeng, 10 – 24. v. 2017, malaise trap, leg: X. Qi. One male (NKU: ZJ 210) China, Zhejiang, Yueqing, Lingdi, Hushangyang, 7. iv. 2019, light trap. leg: X. L. Lin.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA8FFBBFF58AAB3635F0AF7.taxon	etymology	Etymology. Named after Prof. Patrick Ashe, for his outstanding contribution to the knowledge of Chironomidae; noun in nominative case.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA8FFBBFF58AAB3635F0AF7.taxon	diagnosis	Diagnosis. The specie can be distinguished from known species of Rheotanytarsus by the following combination of characters: antenna with 13 flagellomeres, and AR 0.26 – 0.33; thorax with dark brown parallelogram-shaped spots and postnotum dark brown; anal tergite bands separated and horizontal; superior volsella rectangular and broad; inferior volsella slightly curved and apically swollen; gonostylus with pointed apex.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA8FFBBFF58AAB3635F0AF7.taxon	description	Description. Adult males (n = 4, unless stated). Total length 1.41 – 2.08, 1.75 (3) mm. Wing length 1.01 – 1.42, 1.19 (3) mm. Total length / wing length 1.40 – 1.47 (3). Wing length / length of profemur 2.05 – 2.24, 2.16. Colouration (Fig. 1 A). Thorax pale brown with dark brown parallelogram-shaped spots and postnotum dark brown, legs pale brown with apical portion of femur darker, and abdomen pale yellow. Head. Antenna with 13 flagellomeres, ultimate flagellomere 116 – 172, 138 (3) μm long. AR 0.26 – 0.33, 0.29 (3). Temporal setae 6 – 8, 7. Clypeus with 14 – 20, 17 setae. Tentorium 72 – 78, 75 μm long, 7 – 14, 11 μm wide. Palpomere lengths of three specimens (in μm): 24 – 36, 28; 25 – 35, 28; 57 – 63, 60; 77 – 90, 84; 131 – 165, 145; Pm 5 / Pm 3 2.21 – 2.30, 2.42. Third palpomere with 2 sensilla clavata distally. Thorax. Dorsocentrals 7 – 8, 8; acrostichals 6 – 9, 8; prealars 1. Scutellum with 2 – 4, 4 setae. Halteres with 7 – 9, 8 (3) setae. Wing (Fig. 2 A). VR 1.61 – 1.71, 1.66. Brachiolum with one seta, Sc bare, R with 14 – 17, 16 setae, R 1 with 18 – 27, 22 setae, R 4 + 5 with 39 – 56, 46 setae, M 1 + 2 with 37 – 46, 41 setae, M 3 + 4 with 20 – 30, 25 setae, false vein with 59 – 70, 63 setae, Cu with 12 – 16, 14 setae, Cu 1 with 15 – 20, 17 setae, PCu with 34 – 45, 40 setae, An with 19 – 24, 22 setae, remaining veins bare. Cell r 4 + 5 with c. 200 setae, m with 3 – 4, 4 setae, m 1 + 2 with c. 200 setae, m 3 + 4 with c. 100 setae, cu + an with c. 130 setae. Legs. Fore leg bearing single tibial spur, 21 – 23, 22 μm long. Combs of mid tibia 22 – 24, 23 μm wide with 15 – 26, 22 μm long spur, and 23 – 36, 29 μm wide with 18 – 28, 23 μm long spur; combs of hind tibia 20 – 33, 26 μm wide with 15 – 30, 21 μm long spur, 29 – 34, 32 μm wide with 24 – 27, 25 μm long spur. Tarsomere 1 of mid leg of paratypes with 2 – 3, 3 (3) sensilla chaetica. Lengths (in μm) and proportions of legs as in Table 1. Hypopygium (Figs. 2 B-E). Tergite IX 86 – 88, 87 μm long, with 3 – 7, 5 median setae at base of anal point; anal tergal bands separated and horizontal. Anal point 22 – 29, 25 μm long, constricted in the middle and apically swollen, bearing 5 – 7, 6 lateral setae on each side; crests somewhat parallel and nearly reaching apex of anal point, basally developed. Transverse sternapodeme 34 – 41, 38 μm long, with oral projections. Phallapodeme 42 – 67, 55 μm long. Gonocoxite 78 – 94, 84 μm long. Gonostylus 61 – 80, 70 μm long, gradually tapered and pointed apically. Superior volsella (Fig. 2 D) 35 – 43, 38 μm long, broad and somewhat obovoid, with 2 – 3, 3 anteromedian setae and three dorsal setae near apex. Digitus triangular, outer margin curved from middle, bearing one seta located on cylindrical tubercle near base. Median volsella (Fig. 2 E) 100 – 114, 108 μm long, well reaching beyond the apex of inferior volsella, with about six long and thin foliate setae; stem covered with simple setae and slightly curved. Inferior volsella 51 – 52, 51 μm long, slightly curved and apically swollen, with microtrichia. HR 1.13 – 1.30, 1.20. HV 2.31 – 2.61, 2.48. Female and immatures. Unknown.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA8FFBBFF58AAB3635F0AF7.taxon	discussion	Remarks. The new species resembles Rheotanytarsus buculicaudus Kyerematen, 2000 by having similar shapes of anal tergite bands, anal crest and median volsella, but can be separated from the latter species by the following combination characters: superior volsella somewhat obovoid, anal point constricted in the middle, inferior volsella with microtrichia, and gonostylus with pointed apex; whereas superior volsella rounded, anal point with parallel-sided apex, inferior volsella without microtrichia, and gonostylus with blunt apex in R. buculicaudus.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFADFFBEFF58AA0D65930C43.taxon	description	(Figs. 1 B, 3 A – E)	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFADFFBEFF58AA0D65930C43.taxon	materials_examined	Type material. Holotype: male (NKU: LGS 79), China, Qiandongnan Miao and Dong Autonomous Prefecture, Leigongshan National Nature Reserve, Fangxiang, Getoucun country, 15 – 25. i. 2020, malaise trap, leg. H. J. Yu.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFADFFBEFF58AA0D65930C43.taxon	etymology	Etymology. Named after Prof. Clive Pinder, for his outstanding contribution to the knowledge of Chironomidae; noun in nominative case.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFADFFBEFF58AA0D65930C43.taxon	diagnosis	Diagnosis. The species can be distinguished from known species of Rheotanytarsus by the following combination of characters: antenna with 13 flagellomeres, and AR 0.18; thorax with brownish-yellow stripes and postnotum dark brown; tergite IX approximately triangular; superior volsella oval, with a knob-like structure; median volsella with apically broader stem and forked apical setae; gonostylus gradually tapered and curved apically, with rounded apex.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFADFFBEFF58AA0D65930C43.taxon	description	Description. Adult male (n = 1) Total length 2.21 mm. Wing length 1.44 mm. Total length / wing length 1.54. Wing length / length of profemur 2.35. Colouration (Fig. 1 B). Thorax pale brown with brownish-yellow stripes and postnotum dark brown, legs pale brown with apical portion of femur slightly darker, and abdomen pale yellow. Head. Antenna with 13 flagellomeres, ultimate flagellomere 92 μm long. AR 0.18, relatively small. Temporal setae 7. Clypeus with 18 setae. Tentorium 83 μm long, 11 μm wide. Palpomere lengths (in μm): 37, 29, 62, 87, 148; Pm 5 / Pm 3 2.39. Third palpomere with 2 sensilla clavata distally. Thorax. Dorsocentrals 9; acrostichals 9; prealar 1. Scutellum with 6 setae. Halteres with 7 setae. Wing (Fig. 3 A). VR 1.78. Brachiolum with one seta, Sc bare, R with 13 setae, R 1 with 26 setae, R 4 + 5 with 57 setae, RM with one seta, M 1 + 2 with 44 setae, M 3 + 4 with 28 setae, false vein with 79 setae, Cu with 12 setae, Cu 1 with 21 setae, PCu with 49 setae, An with 24 setae, remaining veins bare. Cell r 4 + 5 with c. 250 setae, m with 3 setae, m 1 + 2 with c. 250 setae, m 3 + 4 with c. 100 setae, cu + an with c. 150 setae. Legs. Tibia and all tarsomeres of fore leg used for DNA extraction. Combs of mid tibia 24 μm wide with 27 μm long spur, and 33 μm wide with 25 μm long spur; combs of hind tibia 32 μm wide with 40 μm long spur, 36 μm wide with 34 μm long spur. Tarsomere 1 of mid leg with three sensilla chaetica. Lengths (in μm) and proportions of legs as in Table 2. Hypopygium (Figs. 3 B-E). Tergite IX 66 μm long, with eight median setae at base of anal point; anal tergal bands well separated and of V-type with a small tilt angle. Anal point 33 μm long, with slightly swollen apex, bearing five lateral setae on each side; crests somewhat parallel and nearly reaching apex of anal point. Transverse sternapodeme 31 μm long, with tiny oral projections. Phallapodeme 78 μm long. Gonocoxite 95 μm long. Gonostylus 81 μm long, gradually tapered and curved apically, with rounded apex. Superior volsella (Fig. 3 D) 36 μm long, oval, with two anteromedian setae, and with two (left) or three (right) thicker setae on a knob-like structure on dorsal. Digitus thumb-like, without seta. Median volsella (Fig. 3 E) 126 μm long, well reaching beyond apex of inferior volsella, with long and foliate setae apically, some forked; stem covered with simple setae, slightly curved and apically broaden. Inferior volsella 58 μm long, curved and gradually swollen, with microtrichia. HR 1.17. HV 2.72. Female and immatures. Unknown.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFADFFBEFF58AA0D65930C43.taxon	discussion	Remarks. The new species resembles Rheotanytarsus oss Cranston, 1997 by having similar shapes of superior volsella and median volsella, but can be separated from the latter species by the following combination characters: gonostylus curved apically, tergite IX approximately triangular, anal crests parallel-sided, whereas gonostylus not curved, tergite IX with rounded margin, anal crests of V-type in R. oss.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFAFFFBFFF58A9E265120C42.taxon	description	(Figs 1 C, 4 A – E)	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFAFFFBFFF58A9E265120C42.taxon	diagnosis	Diagnosis. The species can be distinguished from known species of Rheotanytarsus by the following combination of characters: antenna with 13 flagellomeres; anal tergite bands of V-type and separated; anal point slightly constricted in the middle and swollen apically; superior volsella bulb-like, with one knob-like structure dorsally; the stem of median volsella curved, with five thin and long setae apically; inferior volsella curved and mostly with equal width.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFAFFFBFFF58A9E265120C42.taxon	description	Description. Adult male (n = 1) Total length 1.69 mm. Wing length 0.95 mm. Total length / wing length 1.77. Wing length / length of profemur 1.84. Colouration (Fig. 1 C). Thorax pale yellow, with pale brown stripes and postnotum brown, the femur and tibia of fore leg brown, mid and hind legs brown except the basal half of femur pale yellow. Head. Antenna with 13 flagellomeres, ultimate flagellomere 68 μm long. AR 0.16, relatively small. Temporal setae 7. Clypeus with 15 setae. Tentorium 81 μm long, 13 μm wide. Palpomere lengths (in μm): 26, 26, 54, 72, 136; Pm 5 / Pm 3 2.52. Third palpomere with 2 sensilla clavata distally. Thorax. Dorsocentrals 7; acrostichals 8; prealar 1. Scutellum with 4 setae. Wing (Fig. 4 A). VR 1.56. Brachiolum with one seta, Sc bare, R with 11 setae, R 1 with 17 setae, R 4 + 5 with 35 setae, M 1 + 2 with 33 setae, M 3 + 4 with 20 setae, false vein with 84 setae, Cu with 11 setae, Cu 1 with 11 setae, PCu with 36 setae, An with 17 setae, remaining veins bare. Cell r 4 + 5 with c. 250 setae, m with two setae, m 1 + 2 with c. 150 setae, m 3 + 4 with c. 100 setae, cu + an with c. 120 setae. Legs. Fore leg bearing single tibial spur, 24 μm long. Combs of mid tibia 23 μm wide with 18 μm long spur, and 29 μm wide with 18 μm long spur; combs of hind tibia 31 μm wide with 23 μm long spur, 34 μm wide with 28 μm long spur. Tarsomere 1 of mid leg with four sensilla chaetica. Lengths (in μm) and proportions of legs as in Table 3. Hypopygium (Figs. 4 B – E). Tergite IX 64 μm long, with five weak median setae at base of anal point; anal tergal bands of V-type, with a small tilt angle, and with a little bit of basal bands. Anal point 26 μm long, slightly constricted in middle and swollen apically with rounded apex, bearing seven lateral setae on each side; crests of V-type and opened, nearly reaching apex of anal point. Transverse sternapodeme 32 μm long, with oral projections. Phallapodeme 56 μm long. Gonocoxite 77 μm long. Gonostylus 74 μm long, gradually tapered, with rounded apex. Superior volsella (Fig. 4 D) 31 μm long, bulb-like, with two anteromedian setae, three dorsal setae on a knob-like structure on the dorsal, and one ventral seta near base. Digitus reduced and not visible. Median volsella (Fig. 4 E) 99 μm long, well reaching beyond apex of inferior volsella; stem curved, covered with simple setae, and with five long foliate setae apically. Inferior volsella 59 μm long, curved and mostly with equal width, with microtrichia. HR 1.04. HV 2.28.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFAFFFBFFF58A9E265120C42.taxon	discussion	Remarks. Rheotanytarsus oss is recorded in China for the first time. The Chinese specimen fits well with the original description in Cranston (1997) and the review of the pellucidus species group (Kyerematen et al. 2000). Neither of the two studies described and figured the digitus, we found that reduced, and one ventral seta present in the Chinese specimen.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFAFFFBFFF58A9E265120C42.taxon	distribution	Distribution. Australia, Thailand and China (Yunnan).	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA1FFB0FF58A8F262320AF5.taxon	description	(Figs 1 D, 5 A – E)	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA1FFB0FF58A8F262320AF5.taxon	materials_examined	Type material. Holotype: male (NKU: XL 794), China, Guangdong, Guangzhou, Lanxi, 12. iv. 2018, light trap, leg. X. L. Lin.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA1FFB0FF58A8F262320AF5.taxon	etymology	Etymology. Named after Prof. Henk Vallenduuk, for his outstanding contribution to the knowledge of Chironomidae; noun in nominative case.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA1FFB0FF58A8F262320AF5.taxon	diagnosis	Diagnosis. The species can be distinguished from known species of Rheotanytarsus by the following combination of characters: antenna with 13 flagellomeres, AR 0.32; thorax with dark brown parallelogram-shaped spots and postnotum dark brown; anal tergite bands fused, arching upwards basally and horizontal in the middle; anal point with slightly swollen apex; digitus reduced and not visible; the stem of median volsella curved and covered with relatively short foliate setae and simple setae; median volsella with long, thin and foliate setae apically; inferior volsella curved and with equal-width; gonostylus gradually tapered and rounded apically.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA1FFB0FF58A8F262320AF5.taxon	description	Description. Adult male (n = 1) Total length 1.57 mm. Wing length 1.05 mm. Total length / wing length 1.50. Wing length / length of profemur 1.99. Colouration (Fig. 1 D). Thorax pale brown with dark brown parallelogram-shaped spots and postnotum dark brown; legs pale brown, femur and tibia of fore leg darker apically, femur of mid and hind legs darker apically; abdomen pale yellow. Head. Antenna with 13 flagellomeres, ultimate flagellomere 142 μm long. AR 0.32. Temporal setae 8. Clypeus with 18 setae. Tentorium 58 μm long, 11 μm wide. Palpomere lengths (in μm): 49, 40, 104, 146, 238; Pm 5 / Pm 3 2.29. Third palpomere with 2 sensilla clavata distally. Thorax. Dorsocentrals 7; acrostichals 10; prealar 1. Scutellum with 4 setae. Halteres with 7 setae. Wing (Fig. 5 A). VR 1.59. Brachiolum with one seta, Sc bare, R with 16 setae, R 1 with 20 setae, R 4 + 5 with 41 setae, M 1 + 2 with 45 setae, M 3 + 4 with 30 setae, false vein with 81 setae, Cu with 13 setae, Cu 1 with 14 setae, PCu with 44 setae, An with 23 setae, remaining veins bare. Cell r 4 + 5 with c. 250 setae, m with 3 setae, m 1 + 2 with c. 200 setae, m 3 + 4 with c. 100 setae, cu + an with c. 130 setae. Legs. Fore leg bearing single tibial spur, broken. Combs of mid tibia 25 μm wide with 21 μm long spur, and 32 μm wide with 26 μm long spur; combs of hind tibia 33 μm wide with 24 μm long spur, 35 μm wide with 29 μm long spur. Tarsomeres of mid leg lost during DNA extraction. Lengths (in μm) and proportions of legs as in Table 4. Hypopygium (Figs. 5 B-E). Tergite IX 70 μm long, with two median setae at base of anal point; anal tergal bands fused, arching upwards basally and horizontal in middle. Anal point 8 μm long, relatively short and only reaching a little beyond tergite, with slightly swollen apex, bearing four lateral setae on each side; crests of V-type and fused apically, nearly reaching apex of anal point. Transverse sternapodeme 32 μm long, with obvious oral projections. Phallapodeme 43 μm long. Gonocoxite 73 μm long, basal microtrichia area right triangle. Gonostylus 60 μm long, gradually tapered and rounded apically. Superior volsella (Fig. 5 D) 35 μm long, rectangular, with two anteromedian setae, four dorsal setae and one ventral seta. Digitus reduced and not visible. Median volsella (Fig. 5 E) 90 μm long, well reaching beyond apex of inferior volsella, with about five long, thin and foliate setae apically; stem slightly curved, covered with simple setae and about two relative short foliate setae basally. Inferior volsella 59 μm long, markedly curved with equal width, with microtrichia. HR 1.22. HV 2.62. Female and immatures. Unknown.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA1FFB0FF58A8F262320AF5.taxon	discussion	Remarks. The new species resembles Rheotanytarsus buculicaudus Kyerematen, 2000 by having similar shapes of anal tergite bands, median volsella and inferior volsella, but can be separated from the latter species by the following combination characters: superior volsella rectangular, inferior volsella with microtrichia, cell m with only three setae, and tibia of fore leg darker apically; whereas superior volsella oval-like, inferior volsella without microtrichia, cell m with 20 setae, and tibia of fore leg pale in R. buculicaudus.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA0FFB1FF58AEAB641D0AFB.taxon	diagnosis	Diagnosis. This species can be separated from other members of the group by the following combination of characters: anal point long and narrow, anal crest reduced.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA0FFB1FF58AEAB641D0AFB.taxon	distribution	Distribution. China (Yunnan).	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA3FFB2FF58A8F264AF0CF2.taxon	diagnosis	Diagnosis. This species can be separated from other members of the group by the following combination of characters: anal tergal bands nearly horizontal, and inferior volsella without microtrichia.	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
28530D12FFA3FFB2FF58A8F264AF0CF2.taxon	distribution	Distribution. Ghana and China (Fujian).	en	Liu, Wen-Bin, Yao, Yuan, Chang, Tong, Yan, Chun-Cai, Lin, Xiao-Long (2022): Contribution to the knowledge of Rheotanytarsus pellucidus species group from China (Diptera, Chironomidae): three new and one newly recorded species. Zootaxa 5188 (2): 145-156, DOI: https://doi.org/10.11646/zootaxa.5188.2.4
