A review of Microtendipes Kieffer from China (Diptera: Chironomidae)
Author
Qi, Xin
Author
Wang, Xinhua
text
Zootaxa
2006
1108
37
51
journal article
50825
10.5281/zenodo.171499
76f24f53-3552-4b83-b4e1-28a2689e0259
11755326
171499
Microtendipes angustus
sp. n.
(
Figs. 1–5
)
Type
material.
Holotype
male,
CHINA
: Fujian Province, Wuyishan City, Qili Qiao,
28.IV.1993
, light trap, X. Wang (BDN No.02533).
Paratype
:
1 male
, Guizhou Province, Jiangkou County,
27.V.2002
, B. Ji (BDN No.1500).
Diagnostic characters.
The new species is similar to
M
.
chloris
, but can be separated by the shape of the inferior volsella and the color of the legs. In
M
.
angustus
sp. n.
, the inferior volsella is narrowed apically, but not in
M. chloris
.
The front tibia of
M. angustus
sp. n.
is brown in the apical and basal 1/10 and the remaining legs are greenish yellow. In
M
.
chloris
, the front femur is yellowish brown with a narrow apical dark ring, the front tibia and front tarsus I are black, tarsi II and III are brown with basal and apical dark rings, front tarsi IV and V are dark brown, the mid and hind femora are brown with an apical dark ring and the tibia have both basal and apical rings, tarsus I is yellow, and tarsi II to V are brown to dark brown.
Etymology
. The species name is from Latin,
angustus
, meaning narrow, referring to the shape of the inferior volsella, which is narrow in the apical half.
Male imago
(
n
= 2)
Total length
5.25–5.30 mm
. Wing length
3.25–3.38 mm
. Total length/wing length 1.56–1.63. Wing length/length of profemur 2.24–2.41.
Coloration.
Head yellow. Thorax (
Fig. 1
) brownish yellow, scutellum, anterior anepisternum II and epimeron II brown. Abdominal tergites I–IV green, tergites V–X and hypopygium brown. Front tibia brown in apical and basal 1/10, remaining legs greenish yellow.
Head.
AR 1.81–2.17. Temporal setae 17–18, including 5–7 inner verticals, 6–10 outer verticals, and 3–4 postorbitals. Clypeus with 35–38 setae. Tentorium
180–190 m
long,
50–80 m
wide. Palpomere lengths (in m): 60–70, 60–65, 300–325, 340–390, 400–490. L: 5th/3rd 1.33–1.51.
FIGURES 1–5.
Microtendipes angustus
sp. n.
, male.
1,
thorax.
2,
wing.
3,
front femur.
4.
superior volsella.
5,
hypopygium.
Wing
(
Fig. 2
). VR 1.07–1.16. R with 23–25, R1 with 20–21, R4+5 with 27–34 setae. Squama with 10–24 setae.
Thorax.
Dorsocentrals 13–20, acrostichals 3–4, prealars 5–6. Scutellum with 26–27 setae.
Legs
. Distal half of front femur with 24 proximally directed setae in 2 rows (
Fig. 3
),
225–250 m
long. Spur on middle tibia
48–50 m
long including
43–50 m
long comb, unspurred comb
50 m
long, spur on posterior tibia
30–55 m
long including
50 m
long comb, unspurred comb
45–50 m
long. Width at apex of front tibia
70–80 m
, of middle tibia
70–75 m
, of hind tibia
80–
85 m
. Lengths (in m) and proportions of legs:
Hypopygium
(
Figs. 4–5
). Anal point
85–88 m
long, apically slightly swollen and rounded. Tergite IX with 8 setae medially and 17 setae along posterior margin. Phallapodeme
30–50 m
long; transverse sternapodeme
35–88 m
long. Gonocoxite
225 m
long. Superior volsella (
Fig. 5
)
100–163 m
long, sickle shaped, and apically rounded, with 4 dorsal setae, 2 basal seta. Inferior volsella abruptly narrowed in apical 1/2, 128–
133 m
long, with 25 setae. Gonostylus
150–160 m
long, with 11 setae along inner margin in distal 1/3. HR 1.41–1.50, HV 3.31–3.50.
|
fe
|
ti
|
ta
1
|
ta
2
|
ta
3
|
| p1 1400–1450 |
1675–1700 |
1950–2000 |
900–1050 |
920–950 |
| p2 1600–1650 |
1450–1500 |
1050–1075 |
540–550 |
400–430 |
| p3 1750–1875 |
1750–1825 |
1250–1300 |
840–850 |
600–620 |
|
ta
4
|
ta
5
|
LR
|
BV
|
SV
|
BR
|
| p1 800–850 |
360–375 |
1.15–1.16 |
1.61–1.66 |
1.58–1.62 |
2.00–2.50 |
| p2 250–255 |
125–150 |
0.70–0.74 |
3.03–3.15 |
2.88–2.95 |
2.58–4.44 |
| p3 360–370 |
170–180 |
0.71–0.72 |
2.41–2.50 |
2.80–2.85 |
4.00–4.38 |
Distribution.
The species was collected in subtropical mountain areas in Fujian and Guizhou Provinces in Oriental
China
.