Nonbiting midges of the genus Paracladopelma Harnisch (Diptera: Chironomidae) from the Russian Far East
Author
Zorina, Oksana V.
text
Zootaxa
2006
1134
29
49
journal article
10.5281/zenodo.171934
510b41ee-271e-47e4-bff6-c4815f582b0f
11755326
171934
Paracladopelma globosum
sp. nov.
(
Figs. 8–9
)
Type
material
.
Holotype
: male,
Russia
, Sakhalin Island, Tym River,
2 km
from bridge crossing Parkata River,
2–3.VIII.2003
, leg. E. Makarchenko;
Paratype
:
1 male
, same data as
holotype
.
Etymology
. The species name is from Latin
globosum
,
globeshaped, an adjective referring to the form of the superior volsella.
Diagnostic characters
. This new species has a total length of 3.0 mm, AR 1.73, and the superior volsella with globeshaped dorsal lobe and oval ventral lobe covered by microtrichia and 12 setae.
Male imago
(
n
= 2)
Total length 3.0 mm. Wing length
1.85 mm
. Total length/wing length 1.62.
Coloration
. Scape yellow, flagellomeres brown; ground color of thorax pale yellow, mesonotal stripes yellow, 2/3 of postnotum brownish; P1 yellow, except brown on distal 1/ 2 f1 and distal half t1, ta1–5; P2 and P3 yellowish brown; abdomen yellowish brown.
Head
. Frontal tubercles small (length
6.8 m
and wide
4.5 m
). Verticals 10–12. Clypeus with 11 setae. Antenna
1140 m
long. AR 1.73. Maxillary palp
482 m
long, lengths of last 4 palpomeres (in m): 41; 126; 117; 198. Palp length/head width 1.01; antenna length/palp length 2.37.
Thorax
. Antepronotals 1–2, acrostichals 10, dorsocentrals 6–7, prealars 3, supraalars 1. Scutellum with 3–4 setae.
Wing
. Length
1.85 mm
, width 0.53–0.55. VR 1.18–1.20. R with 11–13 setae, R1 with 2 setae, R4+5 with 13–15 setae. Squama with 1 seta, brachiolum with 2–3 setae.
Legs
. Terminal combs of median and hind tibiae with 2 spurs (length
18–22 m
). BR1 2.8, BR2 4.17, BR3 7.0.
Length (in m) and proportions of leg segments:
| P |
fe |
ti |
ta1 |
ta2 |
ta3 |
ta4 |
ta5 |
LR |
SV |
BV |
| P1 |
722 |
513 |
1064 |
532 |
418 |
323 |
152 |
2.07 |
1.16 |
1.61 |
| P2 |
722 |
665 |
380 |
190 |
133 |
76 |
95 |
0.57 |
3.65 |
3.58 |
| P3 |
817 |
855 |
570 |
323 |
247 |
152 |
95 |
0.67 |
2.93 |
2.74 |
Hypopygium
(
Figs. 8–9
). Anal tergite bands of Htype. Anal point (length
59 m
, width
14 m
) widest subapically. Laterosternite IX with 1 seta. Transverse sternapodeme
45 m
long. Gonocoxite (length
108 m
) with 5 setae. Superior volsella with globular, bare dorsal lobe (length
36 m
, width
27 m
) and oval ventral lobe (length
59–68 m
, width
54 m
) covered by microtrichia and 12 setae. Inferior volsella rounded apically (length
122 m
, width
32 m
). Gonostylus (length
104 m
, width
32 m
) slightly curved, widest medially. HR 1.04.
Remarks
. This new species is similar to
P. d o r i s
(Townes) but can be distinguished by having a globeshaped dorsal lobe and oval ventral lobe bearing microtrichia and 12 setae of the superior volsella of the gonocoxite.
Distribution
. Known only from the
type
locality, the Tym River on Sakhalin Island.