Arge turanica Kuznetzov-Ugamskij, 1927

29. Arge turanica Kuznetzov-Ugamskij, 1927

( Fig. 41 View FIGURE 41 )

Arge turanica Kuznetzov-Ugamskij, 1927: 209 (key), 210–211 (description), Figs 1 View FIGURE 1 , 2 View FIGURE 2 , ♀; Taeger et al. 2010: 141.

Current status. Arge turanica Kuznetzov-Ugamskij, 1927 .

Type locality. Uzbekistan, Aktash Mountains.

Lectotype (designated here): ♀, <golden circle> // Ак-Таш [ Uzbekistan, Aktash Mountains], 20.05.1920 // Arge turanica sp. nov., ♀ // DEI-GISHym 89407 // SYNTYPUS Arge turanica Kuz. -Ug., 1927, ♀, teste A. Taeger 2018 // Zoological Institute, St. Petersburg INS_HYM_0001938 [ ZISP] .

Paralectotype: ♀, <silver circle> // Александр[овский]. Хреб[ет]. УрочиЩе Алмалы [ Kyrgyzstan, Alexander Ridge, Almaly Tract], 16.06.1920 // Arge turanica sp. nov. // Н. КуЗнецов [ N. Kuznetsov] det. // Н. КуЗнецов [ N. Kuznetsov] // Zoological Institute, St. Petersburg INS_HYM_0001959 [ ZISP] .

Description. Female ( Fig. 41 View FIGURE 41 ). Body length 8.7 mm; fore wing length 8.1 mm.

Colour. Head, thorax, two basal antennomeres black with strong light blue metallic lustre; abdomen orange, most part of basal (entirely in paralectotype) tergite, two apical, saw sheath, flagellum and legs black with weak blue metallic lustre.

Head. Head behind eyes heavily expanded. Distance between eyes 1.5 × vertical diameter of eye; eye with vertical diameter 1.9 × its horizontal diameter. Postocellar area weakly convex, with weak lateral furrows. POL: OCL: OOL as 1.0: 1.2: 1.2. Medial fovea flat, triangular, in upper part depressed, rounded, closed. Lateral carinae sharp, straight, clearly converging downwards, indistinctly joined, not forming median carina. Supraclypeal area roundly convex. Malar space nearly equal diameter of frontal ocellus. Clypeus with weak semi-circular median excision. Labrum flat ventrally.

Antennae. Antennal length 1.2 × maximum head width; flagellum distinctly curved at base, apex rounded. Antennal setae short and densely adherent.

Thorax. Mesopleuron smooth, strongly shining, evenly covered spread setae; scutellum flat and narrowly rounded at apex.

Legs. Middle and hind tibia with preapical spurs; tibial spurs simple. Basal tarsomeres of hind tarsus shorter than next three combined.

Wings. In fore wing, cell 3Rs with anterior margin approximately equal to posterior margin; distinctly widened at external margin. Vein 3r-m angularly curved. Veins B and M of fore wing join up at same point on vein R. Membrane of cell 1Rs sparse short setae. Wing margin between veins M and Cu almost glabrous or with sparse short setae, shorter than width of vein M.

Abdomen. Abdomen oblong, parallel. Saw sheath 1.6 × as long as wide, simple, triangular, distinctly narrowed towards apex, apex rounded ventrally; in lateral view narrow, convex on ventral margin, narrowly rounded at apex; inner surface with short blunt thick spines.

Lance in lateral view narrow, clearly tapered towards apex, apex acute, medially with pronounced annuli. Maximum width of lance equal to lancet width. Carina of apical part of dorsal margin weakly pronounced, with distinct irregular denticles, remaining part of dorsal margin with longitudinal deep fossa. Lancet with straight dorsal and convex ventral margin. Annuli slightly curved, in apical part indistinct. Annular spines (ctenidia) short, simple, several times shorter than width of annulus. Ventral margin with 23 well-distinct serrulae. Serrulae smooth, with only indistinct denticles along posterior margin. In apical half serrulae rounded, in basal triangular, with bluntly rounded apex. Between serrulae two (rarely three) unequal short and straight pore canals of marginal sensilla.

Remark. Benson (1968) synonymised this species with Arge cingulata without some substantiation. Later, Zhelochovtsev (1976) re-established the status of the species as a valid species, noting the considerable variability of these two species in colouration of the abdomen, which is confirmed by the large series of both species studied by us. The boundaries of variability in the colouration of A. cingulata and A. turanica overlap, but these species are considered valid here.

The original description is based on an unknown number of female syntypes originating from several collection sites in the “Aktash khrebet” ( Uzbekistan, Aktash Mountains ) and “Almaly” ( Kyrgyzstan, Almaly Tract) (translated from Kuznetzov-Ugamskij, 1927: 211). Two females were found in ZISP. The female from Aktash Mountains is here designated as the lectotype .