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 yaanensis
sp. n.
(
Figs. 17–20
)
Type
material.
Holotype
male,
CHINA
: Sichuan Province, Yaan City, Zhougonghe River,
18.V.1996
, light trap, X. Wang (BDN No.12578).
FIGURES 17–20.
Microtendipes yaanensis
sp. n.
, male.
17,
thorax.
18,
wing.
19,
superior volsella.
20,
hypopygium.
Diagnostic characters.
The species can be distinguished from others within the genus by the long, bare superior volsella. The species resembles
M. schuecki
Reiss
, but the wings of
M. yaanensis
are transparent, whereas those of
M. schuecki
have markings. The color of the tarsomeres of
M. yaanensis
is uniformly greenish yellow, whereas
M. schuecki
has the apical fourth of each tarsomere brown.
Etymology
. The species is named after the
type
locality, using the Latin suffix
ensis
, denoting place of origin.
Male imago
(
n
= 1)
Total length
3.63 mm
. Wing length
1.95 mm
. Total length/wing length 1.86. Wing length/length of profemur 2.05.
Coloration.
Head yellow. Thorax (
Fig. 17
) greenish yellow with scutum, postnotum, and epimeron II brown. Abdomen greenish yellow, apex of abdominal tergites V–IX brown, hypopygium brownish yellow. Legs with apical 1/10 of femora and apical and basal 1/10 of tibiae brown; remaining parts greenish yellow.
Head.
AR 1.31. Temporal setae 14, including 3 inner verticals, 5 outer verticals, and 6 postorbitals. Clypeus with 19 setae. Tentorium
140 m
long,
35 m
wide. Palpomere lengths (in m): 50, 50, 160, 195, 280. L: 5th/3rd 1.75.
Wing
(
Fig. 18
). VR 1.26. R with 24, R1 with 18, R4+5 with 24 setae. Squama with 10 setae.
Thorax.
Dorsocentrals 15, acrostichals lacking, prealars 3. Scutellum with 19 setae.
Legs.
Distal half of front femur with 16 proximally directed setae in 2 rows,
200–250 m
long. Front tibia with 2 long subapical setae, without apical scale. Spur on middle tibiae
45 m
long including
25 m
long comb, unspurred comb
25 m
long; spur on posterior tibia
45 m
long including
25 m
long comb, unspurred comb
30 m
long. Width at apex of front tibia
60 m
, of middle tibia
58 m
, of hind tibia
58 m
.
Lengths (in m) and proportions of legs:
|
fe
|
ti
|
ta
1
|
ta
2
|
ta
3
|
ta
4
|
ta
5
|
LR
|
BV
|
SV
|
BR
|
| p1 950 |
910 |
1175 |
590 |
500 |
470 |
170 |
1.29 |
1.75 |
1.58 |
2.15 |
| p2 1075 |
850 |
670 |
295 |
210 |
100 |
75 |
0.79 |
3.82 |
2.87 |
3.00 |
| p3 1175 |
925 |
875 |
520 |
350 |
210 |
100 |
0.95 |
2.52 |
2.40 |
4.00 |
Hypopygium
(
Figs. 19–20
). Anal point
50 m
long, narrow, tapering from middle to truncated apex, with 2 small lateral setae medially. Tergite IX with 3 setae medially and 15 setae at base of anal point. Phallapodeme
30 m
long; transverse sternapodeme
43 m
long. Gonocoxite
170 m
long. Superior volsella (
Fig. 19
)
75 m
long, weakly sinuous, without microtrichiae, basal lobe bearing 4 long setae. Median volsella with a group of weak setae. Inferior volsella
80 m
long, parallel sided, with 17 setae. Gonostylus
113 m
long. HR 1.51, HV 3.22.
Distribution.
The species was collected in Sichuan Province in Oriental
China
.