Microtendipes tuberosus, Qi, Xin & Wang, Xinhua, 2006

Qi, Xin & Wang, Xinhua, 2006, A review of Microtendipes Kieffer from China (Diptera: Chironomidae), Zootaxa 1108, pp. 37-51 : 43-45

Microtendipes tuberosus sp. n.

( Figs. 11–16 )

Type material. Holotype male, CHINA: Guizhou Province, Jiangkou County, Heiwan Town, 27.VII.2001, light trap, R. Zhang (BDN No.14642). Paratype: 1 male, Hainan Province, Changjiang County, Bawangling Nature Conservation Area, 11.V.1988, light trap, X. Wang (BDN No. 14406).

Diagnostic characters. The new species resembles M. schuecki , but the joint of abdominal tergites III–VIII in M. tuberosus is brown, lacking T­shaped marks, whereas Tshaped marks are present in M. schuecki . The new species has a small tubercle on the front femur, whereas such a tubercle is absent in M. schuecki .

Etymology. The species name is from Latin, tuberosus , meaning with lumps, referring to the tubercle on the front femur.

Male imago (n = 2)

Total length 3.25–3.30 mm. Wing length 1.70–1.71 mm. Total length/wing length 1.79–1.89. Wing length/length of profemur 1.63–1.84.

Coloration. Head yellow. Thorax ( Fig. 11 ) with scutum, postnotum, and epimeron II brown. Abdomen ( Fig. 12 ) pale green, joints of tergites III–IX and hypopygium brown. Legs brown in apical 1/10 of femora, apical and basal 1/10 of tibia, and apical 1/10 of each tarsomere; remaining parts of fore, mid, and hind legs greenish yellow.

Head. AR 1.74–1.75. Temporal setae 13–15; including 4–6 inner verticals, 5 outer verticals and 4 postorbitals. Clypeus with 10–18 setae. Tentorium 125–155 m long, 50 m wide. Palpomere lengths (in m): 45–45; 40–45; 140–145; 190–195; 212.5–275. L: 5th/3 rd 1.52–1.90.

Wing ( Fig. 13 ). VR 1.20–1.21. R with 23, R1 with 18, R4+5 with 27 setae. Squama with 12 setae.

Thorax. Dorsocentrals 17–19, acrostichals lacking, prealars 4. Scutellum with 15 or 16 setae.

Legs ( Fig. 14 ). Distal half of front femur with 16 proximally directed weak setae in 2 rows, 25 m long. Spur on median tibiae 57–58 m long including 25–26 m long comb, unspurred comb 30–32 m long; spur on posterior tibia 38–40 m long including 25–30 m long comb, unspurred comb 35–36 m long. Width at apex of front tibia 46 m, middle tibia 45 m, of hind tibia 45 m. Lengths (in m) and proportions of legs: Hypopygium ( Figs. 15–16 ). Anal point 50 m long, parallel­sided, with 3 small setae medially. Phallapodeme 37 m long; transverse sternapodeme 20 m long. Gonocoxite 133–138 m long. Superior volsella ( Fig. 15 ) 68– 68 m long, with basal lobe bearing 5 setae and 1 long lateral seta. Median volsella with 3 long setae. Inferior volsella 80–85 m long, curved, with 20 setae. Gonostylus 93–98 m long, with 12 setae along inner margin in distal 1/3. HR 1.36–1.49, HV 3.38–3.51.

Distribution. The specimens were collected in subtropical mountain areas in Guizhou and Hainan Provinces in Oriental China.

Figures

FIGURES 11 – 16. Microtendipes tuberosus sp. n., male. 11, thorax. 12, abdomen. 13, wing. 14, front femur. 15, superior volsella. 16, hypopygium.