Timia (Empyelocera) gobica Zaitzev

Galinskaya, Tatiana V., 2011, Review of the yellow-bodied species of the genus Timia (Diptera: Ulidiidae) with description of two new species, Zootaxa 2888, pp. 1-22 : 16-19

Timia (Empyelocera) gobica Zaitzev

( Figs 11–12 )

Timia gobica Zaitzev, 1982: 444 .

Other citations. Kameneva, 2000: 187.

Type material. Holotype 3: Mongolia: “ Монголия, Южно-Гобийский аймак, 20 км СВ Булгана, песчаная пустыня с саксаулом, Кандыбина, 10.VII. 1971 ” [Ömnögovi province, 20 km NE Bulgan, sandy desert, on the Alhagi (camel's thorn), 10 July 1971, Kandybina leg.] ( ZISP).

Additional material. Kazakhstan: 4 3, “60 км. NW Джингильды. Кызылкум, В. Зайцев, 24.V.1965 ” [60 km. NW Dzhingilda, Kyzyl Kum, 24 May 1965, Zaitzev leg.] ( ZISP); Mongolia: 4 3, 8 Ƥ, “ Монголия, Южно- Гобийский аймак, стационар Булган (саксаул) (20 км СВ Булгана), Кандыбина, 22.VI.1971 ” [Ömnögovi province, station Bulgan, on the Alhagi (camel's–thorn), 20 km NE Bulgan, 22 June 1971, Kandybina leg.]; Ƥ, Südgobi aimak, 100 km W v. Grenzposten Ovot Chuural, 1250 m; Nr. 835, 23 June 1967, exp. Dr. Z. Kaszab; 2 3, Ƥ, “ Монголия, Южно-Гобийский аймак, 20 км СВ Булгана, (Haloxylon ammodendron), 2.VII.1971 ” [Ömnögovi province, 20 km NE Bulgan, (Haloxylon ammodendron), 2 July 1971]; 4 Ƥ, “ Монголия, Южно-Гобийский аймак, 20 км СВ Булгана, песчаная пустыня с саксаулом, Кандыбина, 19.VII.1971 ” [Ömnögovi province, 20 km NE Bulgan, (sandy desert with the Alhagi (camel's thorn)), 19 July 1971, Kandybina leg.]; Ƥ, “ Монголия, Гоби-Алтайский аймак, родн. Хайчи-Булак, 60 км. ЮВ Бугата, Емельянов, 19.VII.1970 ” [Govi-Altai province, spring Haichi-Bulak, 60 km. SE Bugat, 19 July 1970, Yemelyanov leg.]; 2 3, “ Монголия, Кобдоский аймак, Ур. Елхон, 20 км ЮВ Алтая на Бодончи, Нарчук, 27.VII.1970 ” [Khovd province, hole Elhon, 20 km SE Altai to Bodonchi, 27 July 1970, Nartshuk leg.]; 2 Ƥ, “ Монголия, Южно-Гобийский аймак, Дзэмгин-Гоби, 25 км. ЮЮЗ Хайластын-Худука, Кержнер” [Ömnögovi province, Dzemgin Gobi, 25 km. SSW Haylastyn-Khuduk, I.M. Kerzhner leg.] ( ZISP); Uzbekistan: 3, “Хива, Рават, Л.Зимин, 29.VII.1927 ” [Khiva, Ravat, 29 July 1927 L.Zimin leg.] ( ZISP).

Diagnosis. This species clearly differs from all yellow-bodied species in the subgenus Empyelocera by parafacialium narrow, almost 0.3 times as wide as flagellomere 1. Cell r4+5 completely closed, forming petiolate at wing tip.

Description of the holotype. Male: Head. Frons pale yellow, evenly covered with short and thin black setulae. Frons with band of weak microtrichosity around eye margin. Ocellar triangle shining black. Lateral parts of vertex entirely yellow without dark markings. Occiput pale yellow, covered with short and thin black setulae. Median occipital sclerite yellow; lateral occipital sclerites yellow, with silver-white microtrichosity close to eye margin. Genae yellow, 0.5 times as high as eye. Postgena yellow. Parafacialium yellow, 0.3 times as wide as antennal grooves, 0.5 times as wide as flagellomere 1. Eye as high as wide. Lunula pale yellow. Face yellow, without darkened band along the lower edge. Clypeus pale yellow. Scape and pedicel brown. Flagellomere 1 completely black, matted, roundish. Arista brown. Antennal grooves yellow, with thin silver-white microtrichosity. Proboscis dark brown. Palpus yellow at the base, dark brown at the apex. Setae. 4 small orb (first orbital seta a little longer than the other ones), 1 divergent oc, 1 divergent poc, 1 long divergent m vt, 5 divergent pocl, 1 short pa vt and 1 long convergent i vt. 8 gn, 6 pgn setulae, 1 long gn seta. 2 groups of spc setae over occipital foramen.

Thorax. Yellow, with dark brown lateral spots (mainly on presutural area of scutum) and median strips. Mesonotum with silver-white microtrichosity lateral spots and median strips. Postpronotum slightly microtrichose. Scutellum subshining yellow, faintly sculptured, with short black setulae over its upper surface. Mediotergite yellow, with dark brown spot at middle. Pleura yellow, slightly microtrichose on the upper edge of anepisternum. Pleura covered with rare short black setulae. Katepisternum with pale-brown spot in ventral portion. Setae. 1 pprn, 2 npl, 1 spal, 1 prsc dc, 1 pal, 1 ial seta; 2 pairs of sctl; anepm setae absent; 1 anepst, 1 kepst seta, also anepisternum and katepisternum covered with short black setulae.

Legs. Entirely yellow.

Wings. Hyaline. Cell r4+5 completely closed, forming petiolate at wing tip. Posteroapical extension of cell bcu 0.5 times as long as width of the cell at its middle. Halter yellow.

Abdomen. Yellow, non-microtrichose. Tergites 1+2 and 3 brown, other tergites laterally yellow, brown at middle. Sternite 1 brown, other sternites yellow.

Male genitalia. Surstylus with anteroventral lobe curved proximally at a right angle, bears 2 spines at its inner margin; and with short posteromedial lobe covered with setulae on its ventral side. Cerci tapered at the top, separated by a narrow slit, covered with long setulae. Phallus with one short serrate basal caecum and one wide bare apical caecum. Glans with 2 short hooks, 1 long hook and one membranous lobe.

Body length 4.7–5.0 mm. Wing length 3.7–4.0 mm.

Female: hardly differs from the male, dark brown coloration on the abdomen is usually more strongly developed than males have. Female terminalia: aculeus three times as long as wide at its middle, with four rows of short setae at each side. Cercal unit elongate oval, with 1 pair of long and 1 pair short basal setulae, 1 pair long and 2 pair short apical setulae. 3 rectangular (with rounded corners) spermathecae with smoothed cellular surface and inverted necks; two left with T-shape bifurcated common duct.

Body length 3.0– 3.5 mm. Wing length 3.0– 3.5 mm.

Remarks. Variability was observed in size of dark spots on mesonotum and tergites of the abdomen among examined specimens: dark band on mesonotum sometimes developed under the median strip of microtrichosity, tergites of the abdomen sometimes entirely dark brown; of number of setae: 4–5 small orb, 5–6 divergent pocl, 8– 10 gn, 4–6 long pgn setae; microtrichosity on anepisternum sometimes almost indistinguishable.

Distribution. Kazakhstan, Uzbekistan, Mongolia.

Figures

FIGURE 11. Timia (Empyelocera) gobica Zaitzev, male; a— habitus, lateral view, b— head and thorax, dorsal view; c— head, lateral view; d— head, anterior view; e— wing.

FIGURE 12. Timia (Empyelocera) gobica Zaitzev, male and female genitalia; a— epandrium, posterior view, b— phallus; caculeus, compressed on slide; d— spermatheca.