Xylochironomus mulu, Liu & Tang, 2025
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publication ID |
https://doi.org/10.3897/zookeys.1257.163285 |
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publication LSID |
lsid:zoobank.org:pub:3476CC85-DFAF-47FE-818E-05AA26B19E54 |
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DOI |
https://doi.org/10.5281/zenodo.17477529 |
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persistent identifier |
https://treatment.plazi.org/id/F21B3658-7E15-5E01-9956-784E556C1E0D |
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treatment provided by |
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scientific name |
Xylochironomus mulu |
| status |
sp. nov. |
Xylochironomus mulu sp. nov.
Figs 1 B View Figure 1 , 1 F View Figure 1 , 2 C View Figure 2
Material examined.
Holotype: M, Malaysia • Sarawak, Gunung Mulu National Park, Melinau stream, Paku tributary , alt. 75 m, 04°1'N, 114°49'E, light traps, 12. vi. 2023, leg. H. Q. Tang GoogleMaps . Paratype: • 1 M as holotype GoogleMaps .
Diagnosis.
The new species is characterised by the presence of a small frontal tubercle and the contour of the superior volsella.
Etymology.
From the type locality, Gunung Mulu National Park. The name is a noun in apposition.
Description.
Male imago ( N = 2).
Total length 2.8–3.2 mm. Wing length 1.4–1.5 mm. Total length / Wing length 1.93–2.19.
Head. Frontal tubercle small, 5–6 μm wide and 6–10 μm long. Antenna terminal flagellomere 420–450 μm long, apex with 2–3 long apical setae, 80–100 μm long. AR 0.79–0.84. Temporals with 8–12 inner verticals. Clypeus with 18–21 setae. Lengths of palpomeres 1–5 (in μm): 30–33; 45–50; 100–110; 120–125; 190–210.
Thorax. Acrostichals 16–20; dorsocentrals 8–9; prealars 3; scutellars 5–7 biserial setae, anterior row with 2–4 small setae medially.
Wing. VR 1.18–1.20. R, R 1 and R 4 + 5 with more than 35 setae. Squama with 0–2 setae.
Legs. Scale of fore tibia tongue-shaped, 25–30 μm long; spurs of mid tibia and hind tibia 60–70 and 55–70 μm long, respectively. Lengths and proportions of legs as Table 2 View Table 2 .
Hypopygium (Figs 1 F View Figure 1 , 2 C View Figure 2 ). Tergite IX with 4–6 median setae in one row. Anal point 50–55 μm long, extending to the subapex of inferior volsella. Gonocoxite 150–155 μm long, superior volsella with two basal inner setae arising from the distinct tubercles, and one outer seta, arising from the basidorsal surface of superior volsella, 70–80 μm long, extending the apex of inferior volsella. Gonostylus 115–120 μm long. HR 1.25–1.30.
Remarks.
The new species is characterized by the relative location between inner and outer seta of the superior volsella, and the outer seta extending beyond the terminals of the inferior volsella. The shape of the gonostylus seems to vary depending on orientation.
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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