Shamshevia reshchikovi, Ya, Igor, 2012

Ya, Igor, 2012, Discovery of Shamshevia Grichanov in the Oriental Region (Diptera: Dolichopodidae), Zootaxa 3329, pp. 64-68 : 65-68

Shamshevia reshchikovi sp. nov.

( Figs. 1–4 )

Diagnosis. The new species is close to S. hoanibensis , differing from the latter in the morphology of antenna and hypopygium (see key below). Male of S. hoanibensis with long, cleft epandrial lobe, subequal in length to the surstylus, and cercus with long ventral lobe.

Type material. HOLOTYPE 3 [in glycerol in vial, mounted on pin], India: Goa, Siolim, N15°36.843' E73°46.620', h 30m, 15.02- 01.03.2010, A. Reshchikov ( ZIN).

Etymology. The species is named for the collector, Russian entomologist Aleksei Reshchikov.

Description. Male ( Fig. 1 ): Body and leg colour somewhat faded due to storage in alcohol, with all bristles brown-black. Head: vertex flat; upper occiput concave; frons black–brown; face black; face under antenna as wide as basal height of postpedicel, slightly convergent ventrally. One pair of strong ocellars (broken); one strong vertical bristle on each side at eye margin (broken); one postvertical on each side, not far from upper postocular seta. Antenna ( Fig. 2 ) brown; scape with subtriangular pointed ventral process; pedicel with short visible base, with ring of short setulae, with long concealed conus extending to basal third of postpedicel; postpedicel flat, band-like (male secondary sexual character), with acute apex, bearing short hairs. Arista-like stylus basodorsal, with long segment 1 and short segment 2. Length ratio of scape to pedicel (visible part) to postpedicel to stylus (segments 1 and 2), 9/4/36 /22/13. Proboscis small, yellow-brown; palpus large, ovate, yellow, with apical seta. Postocular setae relatively short, uniserial; two lower setae rather strong. Thorax: Entirely dark brown; upper part of proepisternum with one weak seta; lower part of proepisternum with strong seta just above coxa; 5 pairs of strong dorsocentral bristles of about equal length; 5–6 six pairs of short acrostichals in biserial row; scutellum with one pair of strong widely spaced bristles. Legs: mainly yellow, with simple and mainly brownish coxae and femora; fore coxa with 2- 3 setae apically; hind coxa with one seta at upper third; femora without strong bristles, ventrally bare; tibiae with short apicals, somewhat longer on mid tibia; fore tibia without strong bristles; mid tibia with one anterodorsal at one-third of length from base; hind tibia with 3–4 short dorsals; tibia and tarsomere (from first to fifth) length ratio: fore leg: 38 / 18 / 6 / 6 / 5 / 5, mid leg: 48 / 21 / 9 / 8 / 5 / 6, hind leg: 53 / 14 / 10 / 7 / 5 / 5. Wing ( Fig. 3 ): Colorless and transparent, with brown veins; costal section between R2+3 and R4+5 twice that of costal section between R4+5 and M1+2; R4+5 and M1+2 subparallel in middle part and slightly divergent in apical part of wing; M1+2 broadly curved anteriorly in apical half; dm-cu faint, located at wing base, at level of r-m; apical portion of CuA1 about 15 times length of posterior cross-vein (dm-cu); anal vein fold-like, anal lobe developed, anal angle obtuse; calypter brownish, with simple cilia, but with 1 longish seta; halter brownish. Abdomen: brown, light ventrally; row of longish marginal bristles on tergum 1, otherwise shorter bristling on abdomen; sterna 5–6 weakly sclerotized; segment 7 concealed within tergum 6, ring-like, glabrous; segment 8 large, rounded, covered with setae and microscopic setulae; hypopygium ( Fig. 4 ) brown, small, partly concealed; epandrium flattened laterally, with left lateral foramen; hypandrium weakly sclerotized, fused with epandrium, simple, short, triangular (ventral aspect); parameral sheath sclerotized, projecting, long, narrow, simple, cylindrical; phallus long and thin, simple; a pair of short and narrow symmetrical epandrial lobes originating near base of hypandrium, with two strong setae on apex; surstylus bilobate, more or less straight, with ventral lobe long and wide, curved at apex, bearing few short setulae and one strong middorsal seta; dorsal lobe reduced to short narrow rod bearing strong apical seta; postgonite exposed, narrow, curved ventrally, not reaching apex of surstylus; cercus small, with rounded lobe at base bearing 3 long setae, with subtriangular ventral lobe bearing strong apical seta and few weak setae. Measurements (mm): Body length 1.3, antenna length 0.6, wing length 1.1, wing width 0.5, hypopygium length 0.25.

Female. Unknown.

Figures

FIGURE 1. Habitus of Shamshevia reshchikovi sp. nov.

FIGURE 2. Head of Shamshevia reshchikovi sp. nov.

FIGURE 3. Wing of Shamshevia reshchikovi sp. nov.

FIGURE 4. Hypopygium of Shamshevia reshchikovi sp. nov., left lateral view. Abbreviations: cer—cercus, ep—epandrium, epl — epandrial lobe, hyp—hypandrium, pm sh—parameral sheath, pgt—postgonite, ph—phallus, dsur, vsur—surstylus (dorsal and ventral lobes).