Diversity Of Chelipoda Macquart, 1823 (Diptera: Empididae: Hemerodromiinae) In Northern Thailand With Discussion Of A Biodiversity ‘ Hot Spot’ At Doi Inthanon
Author
Plant, Adrian R.
text
Raffles Bulletin of Zoology
2009
2009-08-31
57
2
255
277
journal article
10.5281/zenodo.5342006
2345-7600
5342006
Chelipoda macrosceles
,
new species
(
Figs. 9
,
19, 20
,
26
)
Material examined. –
Holotype
.
Male
,
VIETNAM
,
Viet Try
,
Sa Pa
,
Sin Chay
,
22°20'N
103°50'E
, c
1,900 m
,
Malaise trap
, coll.
R. de Vries
,
21 Oct. –11 Nov.1999
(
RMNH
).
Paratypes
.
Same data as holotype
,
14 males
,
21 females
(
RMNH
)
;
3 males
,
3 females
(
IRSNB
)
;
4 males
,
3 females
(
NMWC
)
.
Additional material.
VIETNAM
,
Cat Cat
,
1,550 m
,
Malaise trap
, coll.
C. Van Achterberg
,
2 males
,
1 female
,
29 Oct.1999
(
RMNH
)
.
THAILAND
,
Chiang Mai
,
Doi Inthanon National Park
,
Summit Marsh
,
18°35.361'N
98°29.157'E
,
2,500 m
,
Malaise trap
, coll.
Y. Areeluck
,
1 male
,
29 Apr.– 6 May.2007
(
QSBG
,
T1852
)
;
Kew Mae Pan Trail
,
18°33.162'N
98°28.810'E
,
2,200 m
,
1 female
,
22–29 Dec.2006
(
QSBG
,
T1888
)
;
1 male
,
16–23 Mar.2007
(
NMWC
,
T1813
)
;
1 female
,
29 Apr. –6 May 2007
(
QSBG
,
T1853
)
:
Kew Mae Pan
,
18°33.163'N
98°28.8'E
,
1 female
,
2–10 Nov.2006
(
NMGW
,
T388
)
.
Diagnosis. –
Slender species with distinctive black and yellow markings on thorax and elongate front femora with only a single row of denticles beneath. The female abdomen is distinctly petiolate basally.
Description. –
Male.
Body length 2.5–3.0 mm. Head black, lightly dusted, subshining on frons; face bright yellowish white. Eyes clearly separated (not almost touching) below antenna. All setae yellow; ocl and vtl strong; upper upo slightly shorter than vtl, other upo and lpo becoming progressively weaker ventrally; patch of pale setae behind mouth conspicuous. Antenna yellow, stylus darker apically in some lights; poped very narrow apically, 3× long as wide; stylus 2× long as poped. Mouthparts yellow.
Thorax clear yellow, thinly dusted, subshining. Scutum (
Fig. 19
) with somewhat variable brown markings on notopleural area, narrow median stripe widening posteriorly, scutellum, mediotergite and laterotergite (scutal stripe usually broadened at extreme anterior margin of scutum and notopleural mark often extensive). Thoracic setae yellow; anterior dc and sa strong; mid dc (in line with npl) weak and usually two fine small dc immediately behind. Sct fine and rather widely spaced; anterior postpronotal very small.
Figs. 12–13. Male genitalia of
Chelipoda
species
in lateral view: 12.
C. nakladam
new species
; 13.
C. menglunana
Grootaert, Yang &
Saigusa. Abbreviations: lcer, lower lobe of cercus; subep, subepandrial process; ucer, upper lobe of cercus.
Legs yellow. C
1
as long or slightly longer than thorax, slender, 9–10× long as wide, ciliated anteriorly on distal 0.5 with minute yellowish setulae. F
1
slightly longer than C
1
, conspicuously slender, slightly inflated, 8–9× long as wide; a single row of 13–15 minute
av
denticles (
pv
denticles absent) with 2–3
pv
and 3
av
yellow spines and usually a single basal spine ventrally. T
1
0.7× as long as F
1
, the row of minute denticles ventrally rather longer and more erect than usual.
Abdomen yellow with tergites 2–5 and sternites 2–3 dark brown, all setae rather short and sparse. Genitalia with fused Hypan + Epan (
Fig. 9
) brownish yellow, darker dorsally and with rounded blackish patch laterally; rather quadrate, bearing a few short setae; fused lobes rather widely separated dorsally, the aperture between them with greyish membrane covering in front of which is an opening through which internal organs project anterodorsally. Cercus yellow, broadly spathulate apically, bearing distinct regularly spaced setae. Subepandrial process complex, consisting of twisted yellowish structure. Phallus, pale yellow, long, projecting anteriorly.
Wing membrane clear; veins yellowish basally, blackish at level of apex of basal cells, dusky yellow distally. Squamae with pale fringes. Halter white.
Female.
Antenna with poped slightly shorter than male. Thorax (
Fig. 20
) reddish black, subshininng; postpronotal area, thoracic ‘collar’, propleuron and katepisternum anteriorly yellow
Legs similar to male, perhaps even more slender and with ventral denticles on F
1
more numerous (15–19). Abdomen petiolate basally (
Fig. 26
); segments 2–7 subshining black, otherwise yellow; cercus very short, hardly longer than wide, yellow.
Etymology. –
The specific epithet derives from the Greek, macrosceles, meaning long-legged in reference to the slender front femur of this species.
Remarks. –
This species is currently known from moist montane forests between 1,550 and
1,900 m
in the Hoang Lien Son Mountains in northern
Vietnam
and from similar biotopes at
2,200
–2,500
m
on Doi Inthanon,
Thailand
. Adults were caught between October and November and again in March.