Parachironomus wangi Liu & Lin, 2023
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publication ID |
https://dx.doi.org/10.3897/zookeys.1153.98542 |
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publication LSID |
lsid:zoobank.org:pub:33E8B084-33BA-4CD7-8021-7AD989C2E826 |
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persistent identifier |
https://treatment.plazi.org/id/DE07AF99-393F-407D-826E-FCA5C9B45FE1 |
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taxon LSID |
lsid:zoobank.org:act:DE07AF99-393F-407D-826E-FCA5C9B45FE1 |
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treatment provided by |
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scientific name |
Parachironomus wangi Liu & Lin |
| status |
sp. nov. |
Parachironomus wangi Liu & Lin sp. nov.
Figs 3 View Figure 3 , 4 View Figure 4 , 6 View Figure 6
Material examined.
Holotype. Male (SHOU: XL601), China, Xizang Autonomous Region , Shannan City , Gongga County, Gangdui Town , 29.27888°N, 90.82323°E, 3586 m a.s.l., 18.VII.2014, sweep net, leg: X.L. Lin GoogleMaps . Paratypes. One male (TJNU: XL602), collecting data as holotype.
Diagnostic characters.
The species can be distinguished from known species of Parachironomus by the following combination of characters: frontal tubercles absent; tergite IX with triangular posterior margin; anal point slightly wider at base, parallel-sided, swollen apically; superior volsella wide, parallel-sided, bent inward at 1/3 distance from apex, apically rounded, free microtrichia; inferior volsella not reaching beyond anal tergite margin; gonostylus gradually widened distally, curved and parallel-sided, apically rounded.
Description.
Adult males (n = 2, unless otherwise stated). Total length 3.63-3.91, 3.77 mm. Wing length 1.85-1.91, 1.88 mm. Total length/wing length 1.96-2.05, 2.01. Wing length/length of profemur 2.74-2.79, 2.77.
Coloration. Thorax yellowish brown with pale brown spots. Front legs dark brown; femora and basal 1/3 of tarsi I of mid and hind legs yellowish brown, remaining dark brown. Abdomen pale yellow to yellowish brown, with tergites I-VI pale yellow, tergites VII, VIII, and hypopygium yellowish brown.
Head (Fig. 3B View Figure 3 ). Antenna with 11 flagellomeres, ultimate flagellomere 502-536, 519 μm long. AR 1.54-1.55, 1.55. Frontal tubercles absent. Temporal setae 13-14, 14; including 2-4, 3 inner verticals; 4-6, 5 outer verticals; and 5 or 6, 6 postorbitals. Clypeus with 7-9, 8 setae. Tentorium 95-128, 112 μm long, 31-34, 33 μm wide. Palpomere lengths (in μm): 26-28, 27; 37-39, 38; 92-98, 95; 106-109, 108; 176-193, 185; Pm5/ Pm3 1.91-1.97, 1.94.
Thorax (Fig. 3E View Figure 3 ). Antepronotals with 1 or 2, 2 setae, acrostichals 4, dorsocentrals 8, prealars 3. Scutellum with 12 setae.
Wing (Fig. 6A View Figure 6 ). VR 1.10-1.16, 1.13. R with 5 or 6, 6 setae, R1 with 1 or 2, 2 setae, R4+5 with 2 setae. Brachiolum with two setae. Squama with 7-9, 8 setae.
Legs. Front tibia with three subapical setae, 82-91, 87; 84 (1) and 105 (1) μm long. Combs of mid tibia 26-33, 30 μm wide with 15-25, 20 μm long spur, and 21 μm wide with 28 μm long spur; combs of hind tibia 22-26, 24 μm wide with 22-34, 28 μm long spur, 38-42, 40 μm wide with 34-38, 36 μm long spur. Tarsomere 1 of mid and hind legs without sensilla chaetica. Lengths (in μm) and proportions of legs as in Table 4 View Table 4 .
Hypopygium (Figs 4B, E, H View Figure 4 , 6B, C View Figure 6 ). Tergite IX with triangular posterior margin, bearing 4-8, 6 setae at base of anal point. Laterosternite IX with two setae. Anal point originating from caudal margin of anal tergite, slightly wider at base, parallel-sided, swollen apically, 56-60, 58 μm long, 17-21, 19 μm wide at base, 10 μm wide at apex (Fig. 4E View Figure 4 ). Anal tergite bands V-shaped, fused in the middle. Phallapodeme 79-81, 80 μm long. Transverse sternapodeme 39-45, 42 μm long. Superior volsella wide, parallel-sided, bent inward at 1/3 distance from apex, apically rounded, 50-61, 56 μm long, 12-14, 13 μm wide at apex, bearing an apical seta and a proximal lateral seta, both arising from distinct setal pits, free microtrichia. Inferior volsella with distinct blunt caudal projection, not reaching beyond anal tergite margin, and covered by microtrichia (Fig. 4H View Figure 4 ). Gonocoxite 119-135, 127 μm long, with 4 strong medial setae. Gonostylus 171-174, 173 μm long, narrower at base, gradually widened distally, curved and parallel-sided, apically rounded, bearing 6-8, 7 setae along inner margin and one stronger seta at apex. HR 0.70-0.78, 0.74. HV 2.12-2.25, 2.18.
Etymology.
Name after Prof. Xin-Hua Wang, for his outstanding contribution towards increasing our knowledge of aquatic insect taxonomy; noun in nominative case.
Distribution.
China (Xizang).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
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