Paracladopelma urkanensis, 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 : 45-46

Paracladopelma urkanensis sp. nov.

( Figs. 27–28 )

Type material. Holotype: male, Russia, Amursk Region, Urkan River near bridge of route of Tygda­Zeya, 13.VIII.2004, leg. T.Tiuniva.

Etymology. The species name is from the type locality, Urkan River, and the Latin suffix ­ ensis, denoting locality.

Diagnostic characters. This new species has wing length 2.0 mm; AR 2.1; legs brown; tergite IX with Y­type band; superior volsella symmetrical club­shaped, covered by microtrichia and bearing numerous short setae; inferior volsella slightly pointed apically; gonostylus long and narrow, slightly curved, apically pointed.

Male imago (n = 1)

Total length 3.6 mm. Wing length 2.0 mm. Total length/wing length 1.8.

Coloration. Antenna brown; ground color of thorax and scutellum yellowish brown, mesonotal stripes and postnotum brown; legs brown; abdomen brownish, hypopygium brown, superior and inferior volsellae pale yellow.

Head. Frontal tubercles small (length 9 m and width 6.8 m). Clypeus with 12 setae. Antenna 1178 m long. AR 2.1. Maxillary palp 495 m long, lengths of last 4 palpomeres (in m): 63; 99; 144; 189. Antenna length/palp length 2.38.

Thorax. Antepronotals 6, acrostichals 8, dorsocentrals 8–9, prealars 4, supraalars 1. Scutellum with 9 setae.

Wing. Length 2.0 mm, width 0.63. VR 1.09. R with 14 setae, R1 with 12–13 setae, R4+5 with 16–17 setae. Squama with 8–10 setae, brachiolum with 2 setae.

Legs. Terminal combs of median and hind tibiae with 2 spurs (length 18 m). BR1 2.6, BR2 3.6, BR3 5.0.

Length (in m) and proportions of leg segments: Hypopygium ( Figs. 27–28 ). Anal tergite bands Y­type. Anal point (length 68 m, width 14 m) widest subapically. Laterosternite IX with 1 seta. Transverse sternapodeme 50 m long. Gonocoxite (length 104 m) with 5 setae. Superior volsella symmetrical, club­shaped (length 54 m, width 50 m), covered by microtrichia, and bearing numerous short setae. Inferior volsella slightly pointed apically (length 104 m, width 36 m). Gonostylus long and narrow (length 180 m, width 27 m), slightly curved, apically pointed, widest medially. HR 0.58.

Remarks. This new species is closely related to P. alphaeus ( Sublette, 1960) but can be distinguished from it as follows:

­ P. urkanesis : wing length 2.0 mm; AR 2.1; legs brown; tergite IX with Y­type band; superior volsella without dorsal membranous lobe, covered by microtrichia, and with numerous short setae; inferior volsella slightly pointed apically;

­ P. alphaeus (Sublette sensu Jackson 1977): wing length 1.60–1.92 m; AR 1.4–1.8; legs stremineous, knees somewhat darker; tergite IX with mesal longitudinal ridge and 2 small anterior ridges; superior volsella with round dorsolateral, membranous lobe and 9 or 10 strong setae; apical margin of superior volsella parallel to inner margin of gonocoxite; inferior volsella rounded apically.

Distribution. Known only from the type locality, the Urkan River (Amursk Region).

Figures

FIGURES 25 – 28. Male imago Paracladopelma undine (25 – 26) and Paracladopelma urkanensis sp. nov. (27 – 28). 25, 27. Hypopygia. 26, 28. Superior volsellae. Scale bar = 50 m.