Rhipidia (Rhipidia) reductispina Savchenko, 1983

Zhang, Xiao, Li, Yan & Yang, Ding, 2014, A review of the genus Rhipidia Meigen from China, with descriptions of seven new species (Diptera, Limoniidae), Zootaxa 3764 (3), pp. 201-239 : 224-226

Rhipidia (Rhipidia) reductispina Savchenko, 1983

( Figs. 56–61 )

Rhipidia reductispina Savchenko, 1983: 117 . Type locality: Kedrovaya Pad, Khasan district, Primorskiy ( Russia).

Diagnosis. Male antenna with ten bipectinate flagellomeres. Pleuron brownish yellow with two conspicuous brownish black longitudinal stripes. Wing grayish white with numerous small pale gray spots and some large and dark spots; Sc1 ending near midlength of Rs; basal section of CuA1 proximad of fork of M. Lobe of gonostylus with four very short rostral spines.

Description. Male. Body length 7.0– 8.5mm, wing length 8.5–9.0 mm.

Head (fig. 57). Brown, dusted with grayish white. Hairs on head black. Antenna 2.6 mm long. Scape and pedicel brownish black, flagellomeres one to eleven pale yellow with basal enlargements and branches brownish black, terminal flagellomere brownish black. First flagellomere stout basally; each of flagellomeres two to eleven inclusive with two branches which are the longest at sixth or seventh flagellomere and nearly twice as long as corresponding flagellomere; terminal flagellomere longated, exceeding penultimate. Proboscis and palpus brown with black hairs.

Thorax (fig. 56). General brownish yellow to brown, dusted with grayish white. Pronotum brown. Prescutum brown with three brownish black strips. Scutum brown, middle area paler, each lobe with a pale yellow spot. Scutellum brownish yellow to brown. Mediotergite brown. Pleuron brownish yellow with two conspicuous brownish black longitudinal stripes, upper one extending from cervical region to base of abdomen, lower one extending from fore coxa to hind coxa. Hairs on thorax white. Coxae brownish yellow; trochanters yellow; femora yellow with tips brownish yellow; tibiae and tarsi brownish yellow. Hairs on legs brown. Wing (fig. 58) grayish white; all cells with numerous small pale gray spots; large and dark spots at base of cell Sc, middle area of cell Sc, origin of Rs, fork of Sc, fork of Rs and tip of R1; veins pale yellow, darker in clouded areas. Venation: Sc1 ending near midlength of Rs, Sc2 near its tip; basal section of CuA1 proximad of fork of M. Halter 0.8 mm long, white with knob slightly darker.

Abdomen (fig. 56). Tergites and sternites brownish yellow. Hairs on abdomen white.

Hypopygium (figs. 59–61). Posterior margin of tergite nine almost evenly rounded. Gonocoxite with two ventromesal lobes: outside one simple as in most Rhipidia species; inside one columnar and stout, tip with several powerful long hairs. Clasper of gonostylus arched at 2/3 length, suddenly narrowed to apical spine. Lobe of gonostylus large; rostral prolongation relatively long with four very short spine near midlength. Paramere with mesoapical lobe blackened, tip acute.

Female. Body length 8.0–9.0mm, wing length 8.5–9.0 mm. Similar to male, but flagellomeres peach-shaped. Cercus and hypogynial valve pale brownish yellow.

Specimens examined. 1 male (CAU), China: Beijing, Changping, Huyu, 2009. VIII. 22, Qifei Liu. 1 male (CAU), China: Beijing, Huairou, Mt. Yunmeng, 2009. IX. 10, Dan Zhou. 2 males 2 females (CAU), China: Beijing, Yanqing, Mt. Song, 2012. IX. 7, Yang Li and Yuqiang Xi.

Distribution. China (Beijing); Russia.

Remarks. This species is recorded from China for the first time. For description and illustration of this species, also see Savchenko (1983). As described and illustrated in Savchenko (1983), male antenna (fig. 57) has nearly maximum number (ten) of bipectinate flagellomeres in Rhipidia s. str., gonocoxite has two ventromesal lobes, and rostral prolongation has four very short spine (figs. 59–61), which makes the species easily distinguishable from the other species of the genus.

Figures

FIGURES 56 – 58. Rhipidia (Rhipidia) reductispina Savchenko, 1983. 56: Habitus of male, lateral view; 57: Head of male, lateral view; 58: Wing. Scale bar: 56 = 2.0 mm; 57 = 0.5 mm; 58 = 1.0 mm.

FIGURES 59 – 61. Rhipidia (Rhipidia) reductispina Savchenko, 1983. 59: Hypopygium, lateral view; 60: Hypopygium, dorsal view; 61: Hypopygium, ventral view. Scale bar: 59 – 61 = 0.2 mm.