On the genus Polypedilum, subgenus Collartomyia, with description of P. (Col.) baishanzuensis sp. nov. from Baishanzu Nature Reserve, China (Diptera, Chironomidae)
Author
Song, Chao
College of Life Sciences, Taizhou University, Taizhou, Zhejiang 318000, China
Author
Zhu, Binqing
Nanjing Institute of Environmental Sciences, Ministry of Ecology and Environment, Nanjing 210042, Jiangsu, China
Author
Liu, Wei
Lishui Baiyun Ecological Forest Farm, Lishui 323000, Zhejiang, China
Author
Qi, Xin
College of Life Sciences, Taizhou University, Taizhou, Zhejiang 318000, China
qixin0612@163.com
text
ZooKeys
2021
2021-10-22
1065
1
12
http://dx.doi.org/10.3897/zookeys.1065.69870
journal article
http://dx.doi.org/10.3897/zookeys.1065.69870
1313-2970-1065-1
72D58C2C3BD745EABDDE2D03B9EA4673
44EAB18B386B564E8C924A7B4E9AF760
Polypedilum (Collartomyia) baishanzuensis Song & Qi
sp. nov.
Figs 2
, 3
, 4
Type material.
Holotype
(BOLD & TZU sample ID: ZJCH193; Field ID: BSZ60) 1 ♂, China, Zhejiang Province, Lishui City, Qingyuan county, Baishanzu National Nature Reserve,
27.76°N
,
119.31°E
, 11.VIII.2020, Qi X., light trap.
The holotype is deposited in the collection of the College of Life Sciences, Taizhou University, Taizhou, China (TZU).
Diagnostic characters.
The male adult can be distinguished from other
P. (Collartomyia)
species by the following combination of characters: most of the body yellowish; wing with distinct spots on 70% of the proximal part; tarsomeres dark brown; tergite without dark brown band pigmentation; superior volsella with six inner basal setae and three outer lateral setae; dorsal side of inferior volsella with three distinct setiferous tubercles.
Etymology.
The specific name refers to the Baishanzu National Nature Reserve, where the holotype was collected.
Adult male (n = 1). Total length 4.40 mm; wing length 2.75 mm; total length / wing length 1.60; wing length / length of profemur 2.11.
Coloration
(Fig.
2
). Head, thorax and abdomen yellowish; palpomeres dark brown to blackish; femur, tibia and tarsomeres ta1-ta5 of P1 blackish; tarsomeres ta1-ta5 of P2 dark brown; tarsomeres ta3-ta5 of P3 dark brown; gonocoxite and proximal half of gonostylus dark brown.
Figure 2.
Holotype male of
Polypedilum (Collartomyia) baishanzuensis
Song & Qi, sp. nov.
Head
(Fig.
3B
). Frontal tubercle absent. Antenna with 13 flagellomeres, ultimate flagellomere 480
µm
long; AR 0.77. Temporal setae 16, including 8 inner verticals and 8 outer verticals; Clypeus with 57 setae; Palpomere lengths (in
μm
): 70, 95, 277, 145, 330. Length of 5th palpomere / 3rd palpomere 1.19.
Figure 3.
Holotype male of
Polypedilum (Collartomyia) baishanzuensis
Song & Qi, sp. nov.
A
wing
B
head
C
legs.
Thorax
. Dorsocentrals 50; acrostichals 8; prealars 16; scutellum with 39 setae.
Wing
(Fig.
3A
). VR 1.14; Brachiolum without setae; R with 32 setae; R1 with 44 setae; R4+5 with 69 setae; Squama with 33 setae. Anal lobe moderately developed.
Legs
(Fig.
3C
). Terminal scale of fore tibia pointed, 37
μm
long. Spur of mid tibia 55
μm
long including 32 tooth comb, unspurred comb with 33 teeth. Spur of hind tibia 65
μm
long including 26 teeth, unspurred comb with 32 teeth. Lengths (in
µm
) and proportions of legs as in Table
2
.
Table 2.
Lengths (in
µm
) and proportions of legs of holotype male of
Polypedilum (Collartomyia) baishanzuensis
sp. nov. (n = 1).
| - |
Fe |
Ti |
Ta 1 |
Ta 2 |
Ta 3 |
Ta 4 |
Ta 5 |
LR |
BV |
SV |
BR |
| P1 |
1300 |
1010 |
1250 |
850 |
660 |
550 |
265 |
1.24 |
0.65 |
1.85 |
3.03 |
| P2 |
1450 |
1150 |
640 |
395 |
305 |
200 |
150 |
0.56 |
0.32 |
4.06 |
3.90 |
| P3 |
1600 |
1260 |
960 |
550 |
430 |
280 |
160 |
0.77 |
0.37 |
2.98 |
2.90 |
Hypopygium
(Figs
4
-
5
). Basal part of abdominal segment VIII distinctly triangular and markedly pointed at base (Fig.
4A
,
4E
). Anal tergite with 27 median setae, laterosternite with 5 setae; Anal tergite bands strongly developed and sclerotized, forming a circle completely surrounding median setae. Anal point (Fig.
4B
) 125
μm
long and 27.5
μm
wide at base, 5
μm
at apex; transverse sternapodeme 112
μm
long, phallapodeme 175
μm
long. Basal part of superior volsella (50
μm
long and 50
μm
wide) covered with microtrichia and with 6 long setae along inner base and one long seta on outer side; projecting part of superior volsella 105
μm
long, with 2 long setae along the distal outer part (Fig.
4C
). Inferior volsella (Fig.
4D
) 217
μm
long, with 3 tubercle-like projections with strong macrosetae. Gonostylus 262
μm
long with macrosetae along distal inner margin. HR 1.0. HV 1.69.
Figure 4.
Holotype male of
Polypedilum (Collartomyia) baishanzuensis
Song & Qi, sp. nov.
A
tergite VIII
B
hypopygium, dorsal view
C
superior volsella
D
inferior volsella
E
hypopygium, ventral view.
Figure 5.
Holotype male of
Polypedilum (Collartomyia) baishanzuensis
Song & Qi, sp. nov.
A
hypopygium, dorsal view
B
hypopygium, ventral view.
Immatures and female unknown.
Ecology.
Material composed of male adults was light-trapped from stones and boulders in a flowing mountain stream (Fig.
6
), located at an altitude of 1,450 m.
Figure 6.
Type locality of
Polypedilum (Collartomyia) baishanzuensis
Song & Qi sp. nov.
Distribution.
Only known from the type locality in Zhejiang province, China.