Polypedilum (Uresipedilum) Oyewo and Saether from China (Diptera: Chironomidae)
Author
Zhang, Ruilei
Author
Wang, Xinhua
text
Zootaxa
2004
2004-07-14
565
1
1
38
https://biotaxa.org/Zootaxa/article/view/zootaxa.565.1.1
journal article
4804
10.11646/zootaxa.565.1.1
d3a29685-2703-4df5-9f16-2766bb5dd803
11755334
5030339
Polypedilum
(
Uresipedilum
)
paraviceps
Niitsuma
(
Fig. 11
)
Polypedilum
(
Uresipedilum
)
paraviceps
Niitsuma, 1992: 703
.
Material examined:
2 males
,
CHINA
:
Fujian Province
,
Yongtai County
,
Light trap
. 16. 17.
19. IX. 2002
;
Z. Liu
.
Diagnostic characters:
Differs from other members of the subgenus in having a ventral subapical tubercle on the inferior volsella.
Male imago
(n = 2, except when otherwise stated)
Total length 2.51–2.70 mm. Wing length 1.32–1.46. Total length/ wing length1.85– 1.90. Wing length /length of profemur 2.04–2.06.
Coloration
. Body entirely yellow except pale brown fore tarsi. Wing pale.
Head
. AR 1.68–1.73. Ultimate flagellomere
546–599 m
long. Temporal setae 9–11; including 3–3 inner verticals; 4–5 outer verticals and 2–3 postorbitals. Clypeus with 13–15 setae. Tentorium
117–120 m
long,
26–29 m
wide. Palpomere lengths (in m): 29–31; 31–39; 101–120; 101–117; 161–195.
Wing
(
Fig. 11A
). VR 1.21–1.27. Brachiolum with 1 setae,
R
with 15–16;
R
1
with 10– 12,
R
4+5
with 20–25. Squama with 5–9 setae.
Thorax
. Dorsocentrals 7(1); acrostichals 11–12; prealars 4–4. Scutellum with 9(1) setae.
Legs
. Terminal scale (
Fig.11B
) of front tibia oval,
26–29 m
long; spur on median tibiae
44–52 µm
long including
23–26 m
long comb, unspurred comb
23–25 m
long, spur on posterior tibia
52–55 m
long including
26–29 m
long comb, unspurred comb
23–25 m
long. Width at apex of front tibia
36–39 m
, of middle tibia
42–57 m
, of hind tibia
47–
49 m
. Lengths (in m) and proportions of legs (
Table 11
):
TABLE 11.
Polypedilum
(
Uresipedilum
)
paraviceps
Niitsuma. Lengths
of legs (in m).
fe |
ti |
ta1 |
ta2 |
ta3 |
ta4 |
ta5 |
LR |
p1 |
641714 |
399462 |
714792 |
536609 |
357420 |
284326 |
137147 |
1.711.78 |
p2 |
714756 |
578620 |
326339 |
191212 |
138154 |
90106 |
6472 |
0.550.56 |
p3 |
725819 |
630704 |
515557 |
244284 |
212242 |
133158 |
7480 |
0.730.88 |
Hypopygium
(
Figs.11C–F
). Anal tergite bands fused basal to median anal tergite setae. Anal tergite with 5–6 median setae, laterosternite with 2–3 setae. Anal point broad
40–50 m
long, tapering to rounded apex. Phallapodeme
60–75 m
long; transverse sternapodeme
30–35 m
long. Gonocoxite
100–118 m
long. Superior volsella
28–38 m
long, strongly projected posteriorly, base with 3 inner setae and 1–2 apical setae; apicomedial projection
30–33 m
long, pointed at apex. Inferior volsella
70–75 m
long with 17–19 oral setae, not swollen laterally but ventrally with a subapical tubercle bearing one long seta extends caudally. Gonostylus
125–130 m
long. HR 0.80–0.94. HV 1.93–2.16.
Distribution:
The species is distributed in
Japan
and Southeast
China
(Oriental Region).
Remarks
: The species resembles
P
.
(
U
.)
aviceps
, but differs from the latter as follows: Apicomedial projection of superior volsella much longer in
P
.
(
U
.)
paraviceps
; apex of superior volsella strongly projecting posteriorly in
P
.
(
U
.)
paraviceps
, straight in
P
.
(
U
.)
aviceps
; inferior volsella of
P
.
(
U
.)
paraviceps
with subapical ventral tubercle, without in
P
.
(
U
.)
aviceps
; oral setae of inferior volsella in
P
.
(
U
.)
paraviceps
situated on a tubercle, scattered in
P
.
(
U
.)
aviceps
.
In the Chinese material examined,
one specimen
has a superior volsella (
Fig. 11D
) with one apical seta but the others have two apical setae (
Fig. 11C
).