Paracladopelma globosum, Zorina, Oksana V., 2006

Zorina, Oksana V., 2006, Non­biting midges of the genus Paracladopelma Harnisch (Diptera: Chironomidae) from the Russian Far East, Zootaxa 1134, pp. 29-49 : 34-35

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:

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.

Figures

FIGURES 6 – 9. Male imago Paracladopelma furudoprimum (6 – 7) and Paracladopelma globosum sp. nov. (8 – 9). 6, 8. Hypopygia. 7, 9. Superior volsellae. Scale bar = 50 m.