Paratanytarsus paralauterborni, Wang, Xinhua & Guo, Yuhong, 2005

Wang, Xinhua & Guo, Yuhong, 2005, Paratanytarsus Thienemann & Bause from China (Diptera: Chironomidae: Tanytarsini), Zootaxa 940, pp. 1-15 : 5-7

Paratanytarsus paralauterborni sp. n. ( Fig. 3 )

Type Data: Holotype male (BDN 11006), CHINA: Yunnan Province, Lijiang City, Heilongtan (26º52'N, 100º14'E). 28.v.1996, Du. Paratypes 3 males, 2 as the holotype and 1 collected in Guizhou Province, Guiyang City, Huaxi (26º27'N, 106º40'E), 25. vii. 1995, W. Bu.

Diagnostic characters: Anal tergite without lateral teeth. Anal point broad, with rounded apex. Digitus tapering to rounded apex. Anal tergite bands ending at median tergite setae. Superior volsella broadly triangular, its median margin concave; median volsella with bundles of lamellae; inferior volsella divided into 2 lobes.

Etymology: From Latin para meaning close to, referring to the resemblance to the species P. lauterborni .

Male imago (n = 4)

Total length 3.06–3.40, 3.31 mm; wing length 1.76–2.30, 2.01 mm. Total length/wing length 1.46–1.93, 1.66; wing length/length of profemur 2.10–250, 2.32. Ground coloration yellow and thorax with brown vittae; head and abdomen yellow; leg and wing light brown.

Head: Frontal tubercles very small, about 6–8 µm long. AR (n = 3) 1.11–1.22, 1.17; ultimate flagellomere 552–656, 589 µm long. Temporal setae including 3–5, 4 inner verticals, 2–4, 3 outer verticals and 2–3, 2 postorbitals. Clypeus with 12–13, 13 setae. Tentorium 110–130, 118 µm long, width 20–37, 28 µm. Palpomere lengths (in µm): 24–37, 31; 42–55, 49; 98–130, 116; 120–130, 124; 192–200, 195.

Wing: VR 1.07–1.17, 1.10 and Cu length 810–940, 892 µm.

Thorax: Acrostichals 8–13, 11; dorsocentrals 6–10, 8; scutellars 3–7, 5; prealars 1.

Legs. Front tibial spur 14–18, 16 µm long. Spurs of middle tibia 20–28, 25 and 15–25, 21 µm, of hind tibia 25–32, 28 and 25–30, 27 µm long. Combs of middle tibia composed of 14–16, 15 and 10–14, 12 teeth, of hind tibia 18–26, 21 and 12–18, 15 teeth. Lengths (in µm) and proportion of legs are given in Table 3.

fe ti ta1 ta2

P1 780–920, 865 520–700, 610 840–1100, 967 440–480, 460 P2 670–900, 814 620–800, 705 360–448, 402 208–280, 246 P3 904–1100, 1008 800–1060, 920 600–704, 664 368–464, 424

ta3 ta4 ta5 LR

P1 336–370,353 264–296, 280 120–140, 130 1.60–1.62, 1.61 P2 160–224,192 104–144, 126 64–96, 80 0.56–0.58, 0.57 P3 256–336,306 184–210, 198 100–112, 105 0.66–0.73, 0.69

Hypopygium ( Fig. 3 ): Anal tergite bands narrowly separated in middle. Anal tergite with 2 pairs of long median tergite setae and 10–12 ventroapical setae. Anal point broad, about 30 µm long, with pair of anal crests. Phallapodeme 40–64, 50 µm long. Transverse sternapodeme 18–30, 25 µm long, with oral projections. Gonocoxite 140–157, 148 µm long. Superior volsella broadly triangular, its median margin concave, with 3–7 dorsal and 3–6 inner surface setae, 1 seta at base arising on ventral side. Digitus tapering to rounded apex and extending beyond median margin of superior volsella, about 12–14, 13 µm long. Median volsella 76–88, 82 µm long, its lateral margin without lamellae, inner margin with about 5–8 setiform lamellae and with bundle lamellae apically. Inferior volsella 100–104, 103 µm long, apically divided into 2 lobes and with about apical 16–24 setae. Gonostylus 144–160, 154 µm long. HR 0.90–1.08, 0.97; HV 1.96–2.33, 2.15.

Remarks: Among the known species of the genus, the new species resembles P. lauterborni (Kieffer) in the characters of the hypopygium. However the anal tergite lateral teeth are absent in the new species but present in P. lauterborni . Also, the new species has the digitus rounded apically but pointed in P. lauterborni . The lamellae of the median volsella of the new species are longer than those of P. lauterborni . The species is also similar to P. inawaprimus Sasa 1993 in the characters of the hypopygium; however, the lamellae of this species are in bundles while they are almost separated in P. inawaprimus .

Distribution: The present species is known from Yunnan and Guizhou Provinces (Oriental China).

Figures

FIGURES 1 – 4. 1. Hypopygium of Paratanytarsus dissimilis (Johansen). 2. Hypopygium of Paratanytarsus inopertus (Walker). 3. Hypopygium of Paratanytarsus paralauterborni sp. n. 4. Hypopygium of sp. A.