Paracladopelma nereis (Townes)

Zorina, Oksana V., 2006, Non­biting midges of the genus Paracladopelma Harnisch (Diptera: Chironomidae) from the Russian Far East, Zootaxa 1134, pp. 29-49 : 38-39

Paracladopelma nereis (Townes)

( Figs. 16–19 )

Harnischia (Cladopelma) nereis Townes, 1945: 150

Chironomus (Cryptochironomus) nereis (Townes) ; Sublette & Sublette (1965: 168) Paracladopelma nereis (Townes) : Mozley & Garcia (1972: 109)

Material. 2 males, Russia, Primorye Territory, Tumannaya River, 18.V.1999, leg. E. Makarchenko; 2 males, Razdolnaya River near Pokrovka Village, 15–16.V.1993, leg. E.

Makarchenko; 1 male, Ussuri River at about 1.5 km from Kirovsky, 23.IX.1991, leg. T. Tiunova; 1 male, Kabarga River near railway bridge, Ussuri River basin, 14.VII.2000, leg. T. Tiunova; 1 male, Khabarovsk Territory, Amur River basin, Bidzhan River near Preobrazhenovka Village, 4.VIII.2003, leg. T. Tiunova; 1 male, Tunguska River near Danilovka Village, 26.VI.2004, leg. T. Tiunova; 1 male, Zavitaya River near railway bridge of route Birobidzhan­Khabarovsk, 1.IX.2004, leg. T. Tiunova; 2 males, Amursk Region, Zeya River at about 1 km above of bridge, 20.VIII.2004, leg. T. Tiunova.

Male imago (n = 8)

Total length 3.0– 4.1 mm. Wing length 1.7–2.4 mm. Total length/wing length 1.42–1.93.

Coloration. Scape yellowish brown or brown, flagellomeres dark brown; ground color of thorax pale yellow, mesonotal stripes yellow, 2/3 of postnotum brown; P1 yellow, except brown on distal 2/3 f1 and t1, ta1–5; P2 and P3 yellowish, ta1–5 gradually darkened toward apex or f2 and f3 yellowish brown at distal end and t2 and t3 yellowish brown at proximal end; abdomen yellowish brown.

Head. Frontal tubercles 9.0– 22.5 m long and 6.8–11.3 m wide. Verticals 12–17. Clypeus with 11–16 setae. Antenna 1045–1292 m long. AR 1.89–2.09. Maxillary palp 500–554 m long, lengths of last 4 palpomeres (in m): 54–68; 113–117; 135–158; 185–212. Antenna length/palp length 2.33–2.43.

Thorax. Antepronotals 3–5, acrostichals 10–12, dorsocentrals 5–9, prealars 2–4, supraalars 1. Scutellum with 7–11 setae.

Wing. Length 1.7–2.4 mm, wide 0.53–0.72. VR 1.16–1.21. R with 4–10 setae, R1 without setae, R4+5 with 2–4 apical setae. Squama with 3–10, brachiolum with 1–3 setae.

Legs. Terminal combs with 2 spurs (length 18–23 m). LR1 1.58–1.81, LR2 0.58–0.63, LR3 0.63–0.68; SV1 1.32–1.44, SV2 3.40–3.62, SV3 2.88–3.09; BV1 1.75–1.86, BV2 3.48–3.83, BV3 2.58–2.75; BR1 2.5–3.0, BR2 4.3, BR3 4.4–4.5.

Hypopygium ( Figs. 16–19 ). Median longitudinal ridge of anal tergite bands absent. Anal point (length 54–59 m, width 9–14 m) widest in apical half. Laterosternite IX with 1–2 setae, rarely 0. Transverse sternapodeme 50 m long. Gonocoxite (length 72–99 m) with 5–11 setae. Superior volsella foot­shaped (length 32–50 m, width 32–45 m) with 12–15 setae. Inferior volsella apically rounded (length 72–108 m, width 23 m). Gonostylus (length 117–180 m, width 23–27 m) slightly curved, on apex with rounded tubercle. HR 0.55–0.65.

Distribution. Holarctic. In the Palaearctic Region, the species is known from North Korea ( Saether et al. 2000) and the Russian Far East ( Makarchenko et al. 2005). It is recorded from Russia for the first time.

Figures

FIGURES 14 – 19. Male imago Paracladopelma nais (14 – 15) and Paracladopelma nereis (16 – 19). 14, 16. Hypopygia. 15, 18, 19. Superior volsellae. 17. Anal point. Scale bar = 50 m.