Timia (Empyelocera) orientalis 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 : 19-22

Timia (Empyelocera) orientalis Zaitzev

( Figs 13–14 )

Timia (Empyelocera) orientalis Zaitzev, 1982: 445 .

Other citations. Kameneva, 2000: 191.

Type material. Holotype 3: Mongolia: “ Монголия, Южно-Гобийский аймак, Бордзон-Гоби, 80 км. ЮЮВ Номгона, Зайцев, 5–8.VIII.1967 ” [Ömnögovi province, Bordzon Gobi, 80 km. SSE Nomgon, 5–8 Aug. 1967, V.Zaitzev leg.] ( ZISP). Paratypes. China: 3 Ƥ, “Баинхудук; с. Алашань, Козлов, 20.V.1909 ” [Bainhuduk, north Alashan Plateau, Gobi Desert, 20 May 1909, Kozlov leg.] ( ZISP).

Additional material. China: 3, “Эцзин-гол, с. Алашань, Гоби, Козлов, 18.VI.1909 ” [Etszin-gol, north Alashan Plateau, Gobi Desert, 18 June 1909, Kozlov leg.] ( ZISP); Mongolia: Ƥ, “ Монголия, Южно-Гобийский аймак, Бордзон-Гоби, 80 км. ЮЮВ Номгона (пески), Кержнер, 5–8.VIII.1967 ” [Ömnögovi province, Bordzon Gobi, 80 km. SSE Nomgon, (sands), 5–8 Aug. 1967, Kerzhner leg.]; 8 Ƥ, 3 3, “ Монголия, Южно-Гобийский аймак, Бордзон-Гоби, 80 км. ЮЮВ Номгона (пески), Емельянов, 5–8.VIII.1967 ” [Ömnögovi province, Bordzon Gobi, 80 km. SSE Nomgon, (sands), 5–8 Aug. 1967, Yemelyanov leg.] ( ZISP).

Diagnosis. This species is similar to T. (E.) flaveola sp. nov., but differing by the mesonotum with silver-white microtrichose lateral spots and median strips ( T. (E.) flaveola sp. nov. with the mesonotum entirely silvery white microtrichose, without rows of confluent shining spots around setae). Posteroapical extension of cell bcu 0.4 times as long as width of the cell at its middle (in T. (E.) flaveola sp. nov. with posteroapical extension of cell bcu 1.5 times as long as width of the cell at its middle). Cercal unit with two pairs of long basal setulae ( T. (E.) flaveola sp. nov. with three pairs of setulae). Aculeus with two rows of short setae at each side ( T. (E.) flaveola sp. nov. with four rows of setae).

Description of the holotype. Male: Head. Frons yellow, short and thin black setulose, non-microtrichose. Frons as high as wide. Ocellar triangle shining black. Lateral parts of vertex entirely yellow without dark markings. Occiput yellow, slightly microtrichose, short and thin black setulose. Median occipital sclerite yellow, with thin microtrichosity. Lateral occipital sclerites yellow, with silver-white microtrichosity close to eye margin. Genae yellow, 0.4 times as high as eye. Postgena yellow. Parafacialium yellow, relatively wide, 0.7 times as wide as antennal grooves, as wide as flagellomere 1. Eye as high as wide. Lunula yellow. Face yellow, without darkened band along the lower edge. Clypeus yellow. Scape and pedicel pale orange. Flagellomere 1 orange, matted, roundish. Arista pale brown. Antennal grooves yellow, with thin silver-white microtrichosity. Proboscis brown. Palpus yellow. Setae. 3 small orb (first orbital seta a little longer than the other ones), 1 divergent oc, 1 divergent poc, 1 long divergent m vt, 6 divergent pocl, 1 short pa vt and 1 long convergent i vt. 6 gn, 5 pgn setulae, 1 long gn seta. 2 groups of spc setae over occipital foramen.

Thorax. Yellow, with pale brown lateral spots (mainly on presutural area of scutum) and median strips. Mesonotum with silver-white microtrichose lateral spots and median strips. Postpronotum with thin silver-white microtrichosity, connecting with a longitudinal median stripe by a band on the front margin of the mesonotum. Scutellum subshining yellow, faintly sculptured, with short brown setulae over its upper surface. Mediotergite brown, with brown spot at middle. Pleura yellow, with short black setulae, with slight microtrichosity on the upper edge of anepisternum and on the border of anepisternum and anepimeron. 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 opened, but apices of veins R4+5 and M are almost contact. Posteroapical extension of cell bcu 0.4 times as long as width of the cell at its middle. Halter pale yellow.

Abdomen evenly short and thin black setulose. Tergite 1+2 brown, other tergites laterally yellow, brown at middle. Sternites yellow.

Male genitalia. Surstylus with anteroventral lobe curved proximally at a right angle, bears 3 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 3 short hooks, 1 long hook and one membranous lobe.

Body length 4.7–5.3 mm. Wing length 3.7–4.5 mm.

Female: similar to male, except genital structures. Female terminalia: Aculeus 4.5 times as long as wide at its middle, with two rows of short setae at each side. Cercal unit elongate oval, with 1 pair of long basal setulae, 1 pair long and 3 pair short apical setulae. 3 spherical spermathecae with smoothed cellular surface and inverted necks; two left with T-shape bifurcated common duct.

Body length 5.0–6.0 mm. Wing length 4.0– 5.5 mm.

Remarks. Variability was observed in number of setae among examined specimens: 3–4 small orb, 6–8 divergent pocl, 6–10 gn, 5–6 long pgn setae; microtrichosity on anepisternum sometimes almost indistinguishable; the last tarsomere sometimes darkened to pale brown.

Distribution. Mongolia, North China.

Figures

FIGURE 13. Timia (Empyelocera) orientalis Zaitzev, male; a— habitus, lateral view, b— head and thorax, dorsal view; chead, lateral view; d— head, anterior view; e— wing.

FIGURE 14. Timia (Empyelocera) orientalis Zaitzev, male and female genitalia; a — epandrium, posterior view, b — phallus; c — aculeus, compressed on slide; d — spermatheca.