taxonID	type	description	language	source
03C08789FFE8FFDDC4FBDBE2FB0DFE14.taxon	description	Figure 1 http: // zoobank. org / urn: lsid: zoobank. org: act: A 4614995 - CDA 4 - 4 C 97 - 854 E- 6 CFBBF 2 E 958 D	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFE8FFDDC4FBDBE2FB0DFE14.taxon	materials_examined	Material Examined. Holotype, M, CHINA: Yunnan Province, Lijiang City, Yulong County, Laojunshan (shan = mountain) National Geopark, 19. iv. 2024, leg. SN Ma. Paratypes: 4 males, all as the holotype.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFE8FFDDC4FBDBE2FB0DFE14.taxon	etymology	Etymology. For the type locality, Mt. Laojun, a famous scenic spot also called the 99 - lake group in Yunnan Province. To be treated as a noun in apposition.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFE8FFDDC4FBDBE2FB0DFE14.taxon	description	Description Adult male (n = 5). Total length 5.3 – 5.5, 5.4 mm. Wing length 3.1 – 3.5, 3.4 mm. TL / WL 1.54 – 1.71, 1.63. Head. Antenna with 13 flagellomeres, last flagellomere 940 – 970, 955 μm long. AR 2.19 – 2.21, 2.20. Temporals 20 – 24, 22, including 8 – 10, 10 verticals, 6 – 8, 6 orbitals and 5 – 6, 6 postoculars. Palpomere lengths (in μm): 45 – 60, 53; 90 – 110, 99; 175 – 215, 195; 215 – 220, 218; 250 – 255, 253. Clypeus with 22 – 30, 26 setae. Thorax. Acrostichals 24 – 28, 26; dorsocentrals 23 – 30, 27; prealars 10 – 20, 15; scutellars 27 – 40, 33. Wing. R with 27 – 34, 29 setae; R 1 with 14 – 16, 15 setae; R 4 + 5 with 14 – 16, 15 setae; squama with 40 – 52, 46 setae. VR 0.73 – 0.90, 0.85. Legs. Spur of fore tibia 85 – 90, 89 μm long; spurs of mid tibia 60 – 70, 63 and 60 – 80, 70 μm; spurs of hind tibia 55 – 60, 59 and 70 – 95, 85 μm long. Hind tibia comb with 10 – 15, 11 setae. Lengths and proportions of legs as Table 1. Hypopygium (Figs. 1 A – F). Tergite IX with 15 – 18 setae on each side. Laterosternite IX with 8 – 10 setae. Anal point 75 – 95, 86 μm long, with a round apical peg, diameter 15 – 18 μm (Fig. 1 D). Only lateral aedeagal lobe present, apex pointed (Fig. 1 F). Gonocoxite 270 – 330, 304 μm long, gonostylus 150 – 180, 163 μm long, with a shallow protuberant lobe near the middle and a heel in the apex. Megaseta 15 – 20, 16 μm long. HR 1.54 – 2.2, 1.89. Female and immatures. Unknown	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFE8FFDDC4FBDBE2FB0DFE14.taxon	discussion	Remarks. In the latest key to the known Holarctic species of Pagastia (Makarchenko & Hansen 2020, p. 175), the new species keys to couplet 8, but anal point with a rounded apical peg (Fig. 1 D), in contrast to the pointed apical peg as represented by P. (s. str.) hidakamontana Endo and P. (s. str.) donoliveri Makarchenko & Hansen. If the shape of apical peg is omitted, P. (s. str.) laojun resembles P. (s. str.) donoliveri further by the shape of gonostylus with outer heel. However, the combination of round apical peg and the shape of gonostylus is distinct and unique, which can be easily separated from congeners. Currently, the species is only known in the type locality.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDDC4FBD8B7FAF5F956.taxon	description	Figures 2 A – D http: // zoobank. org / urn: lsid: zoobank. org: act: C 3711092 - 9579 - 4 A 49 - 8 F 4 F- 71 A 1961 A 064 C	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDDC4FBD8B7FAF5F956.taxon	materials_examined	Material Examined. Holotype, M, CHINA: Yunnan Province, Lijiang City, Yulong County, Laojunshan (shan = mountain) National Geopark, 19. iv. 2024, leg. SN Ma.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDDC4FBD8B7FAF5F956.taxon	etymology	Etymology. For Latin, neo -, means new, referring to the similarity with Pseudodiamesa (s. str.) branickii.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDDC4FBD8B7FAF5F956.taxon	description	Description. Adult male (n = 1). Total length 7.0 mm. Wing length 4.8 mm. TL / WL 1.46. Head. Antenna with 13 flagellomeres, the last flagellomere 1200 µm long, AR 2.48. Temporals 75, including 63 verticals, 5 postoculars, and 17 orbitals. Palpomere lengths (in μm): 80; 200; 310; 280; 390. Clypeus with 30 setae. Thorax. Acrostichals 0, dorsocentrals 29, prealars 11, scutellars 50. Wing. R with 25 setae; R 1 with 15 setae; R 4 + 5 with 6 setae; squama with 62 setae. VR 0.84. Legs. Spur of fore tibia 110 μm long; spurs of mid tibia 80 and 90 μm; spurs of hind tibia 70 μm and 120 μm long. Hind tibia comb with 12 setae, 40 – 90 μm long. Lengths and proportions of legs as Table 2. Hypopygium (Figs. 2 A – D). Tergite IX with 30 setae on each side, consisting of a semi-enclosed pale patch. Laterosternite IX with 15 – 18 setae. Anal point 90 μm long, tapering towards the apex, with a weak sclerotized vestigial mark between the main stem and the peg (Figs. 2 A, C). Sternapodeme with a broad arch, 55 μm wide in the middle. Aedeagal lobe elongate, tapering towards to the apex, ca. 160 μm long (Figs. 2 B, D). Gonocoxite 510 μm long, with a triangular lobe basally, bearing more than 20 long setae (ca. 50 μm) in the outer margin, a protuberance with a tuft present in the dorsomedial surface. Gonostylus 265 μm long, with a broad protuberant lobe near the middle. Megaseta 45 μm long. HR 1.92. Female and immatures. Unknown	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDDC4FBD8B7FAF5F956.taxon	discussion	Remarks. The current species is relatively larger and easy to separate from the known species in the branickii - group by the shape of gonostylus (Figs. 2 A – D). Currently, the species is only known in the type locality.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDBC4FBDE70FD63FF48.taxon	description	Figure 2 E – F	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDBC4FBDE70FD63FF48.taxon	materials_examined	Material examined. 2 M. CHINA: Xinjiang Uygur Autonomous Region, Hami City, Hulugou, the eastern part of Mt. Tien, 28. viii. 2024, leg. ZH Wu.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
03C08789FFEAFFDBC4FBDE70FD63FF48.taxon	discussion	Remarks. The Hami population examined here shows no clear difference from other populations under this name. Some morphological notes are as follows: a total length of 6.0 – 6.5 mm, wing length of 4.3 – 4.4 mm, AR lost, and LR 1 value of 0.55 – 0.60. According to Makarchenko et al. (2023, p. 324, fig. 20), the P. (s. str.) branickii group is a complex, consisting of 2 to 5 species based on different molecular delimitation methods. Since this species group is in need of a revision using integrated morphological and molecular methods, our specimens could not be identified into a species level here.	en	Wu, Zehao, Tang, Hongqu (2025): Description of two mountain midges (Diptera, Chironomidae, Diamesinae) from China. Zootaxa 5642 (3): 287-292, DOI: 10.11646/zootaxa.5642.3.6, URL: https://doi.org/10.11646/zootaxa.5642.3.6
