Neohemigaster antropovi Galinskaya & Shatalkin

Galinskaya, Tatiana V. & Shatalkin, Anatole I., 2013, Neohemigaster Malloch, 1939 and Pterogenia Bigot, 1859 (Diptera: Platystomatidae) from eastern Eurasia, with the description of four new species, Zootaxa 3666 (2), pp. 267-285 : 277-279

Neohemigaster antropovi Galinskaya & Shatalkin sp. nov.

( Fig. 10 )

Type material. Holotype Ƥ: “Южн. Приморье, Глазковка, 15 км ЮЗ Валентина, 26.VIII.1986. А.Антропов” [South Primorye, Glazkovka, 15 km SW of Valentine, 26.VIII.1986. A.Antropov] (ZMMU).

Diagnosis. The new species is similar to N. ussurica (described from Far East of Russia, Ussuri region) in lacking of separate brown spot on gena under eye. Face yellow with three black spots, gena, postgena and occiput black in lower half (in N. ussurica face yellow with single black medial spot; gena and postgena entirely yellow). N. ussurica was described basing on a single male. Comparing species, we used a specimen of N. ussurica with label: 3, “Примор. обл., Терней, 12.VIII.1936, К.Грунин” [Primorskaya oblast’, Terney, 12 VIII 1936, K.Grunin] (ZISP). It is a second finding of this species. Wing color pattern of N. ussurica ( Fig. 10 e) is given after analysis this specimen and in some minor details is different from the wing pattern of the holotype (Korneyev, 2001).

Description of the holotype. Female. Head yellow ( Fig. 10 c, d). Head ratio (length:height:width) = 1:2.3:3.4. Frons: about 0.4 as wide as head, slightly wider anteriorly (frons at the level of anterior black band 1.2 times as wide as its width at the level of posterior ocelli); evenly covered with short and thin black setulae; with distinctive dark-brown pattern, composed of median longitudinal stripe and two transverse stripes located on the front and back margins of median stripe; anterior transverse stripe is dumbbell-like (i.e. extends to eye margin); anterior transverse stripe not reach to anterior frons margin; posterior transverse stripe arcuate, it’s posterior margin turning dorsally; its medial part connects to posterior ocelli; anterior margin of this stripe close to expanded parts of the anterior band. Eye bare, about 1.9 times as high as wide. Gena about 0.28 times as high as eye. Lunule and face between antennae blackish brown, black setulose. Parafacial very narrow at level of antennal groove, smooth. Facial ridge broad, yellow; its ventral margin with a group of black setulae not assembled in linear series. Face yellow with three black spots forming triangle if connected. Margin of peristomal cavity with three narrow spots, medial spot narrowly elongated to the median facial spot. Gena smooth, yellow, dark-brown in ventral half. Occiput dark brown. Postgena light yellow, black in lower part. Brown spot, connecting to posterior margin of eye, above its ventral angle, absent. Ventral margin of eye with brownish bordering. Scapus blackish-brown, with rather dense black setulae. Pedicel brown with yellow setulae, except short thick dorsal and ventro-marginal setulae black. First flagellomere yellow, brownish dorsally, short, about 1.3 times as long as wide. Arista short setulose (longest rays equal to or less than thickness of arista base), yellow in basal one sixth, otherwise brownish black. Palp yellow, covered with black setulae. Proboscis black.

Setae: 1 o vt, 1 i vt; orb, oc and poc absent; 1 gn well-developed, black.

Thorax blackish-brown ( Fig. 10 b). Postpronotal lobe yellow; narrow yellow stripe, bordering black notopleuron, begins from postpronotal lobe and reaches to transverse suture. Mesonotum black (as in N. eurysterna , but spots on disk grey, not yellow), with 3 longitudinal grey stripes, medial stripe with yellow-whitish microtrichia; the rest of mesonotum black setulose; postsutural supra-alar stripe yellow; postsutural area of scutum with two transverse stripes between longitudinal grey stripes. Anepisternum with two yellow stripes: continuous dorsal stripe and ventral stripe, broken into two spots. These ventral spots displaced and not dispose in line one with another ( Fig. 10 a). Greater ampulla whitish microtrichose. Scutellum black, with yellow spot in apical part, with yellow-whitish microtrichia on disk and with black setulae laterally; narrow stripe at scutellum base without setulae.

Setae: 1 pprn, 2 npl, 1 psut spal, 1 very strong pal, 1 ial, 1 weak dc; 3 pairs of rather stout sctl at posterior margin; 1 anepst; kepst absent.

Legs black. Tibia with two yellow rings medially and basally. Tarsomeres 1–2 entirely and tarsomere 3 ventrally yellow; tarsomeres 4–5 brown.

Wing hyaline, with numerous brownish-grey irregular spots ( Fig. 10 e). Stem R vein without dorsal setulae. Vein R 4+5 setulose dorsally on 9/10 of its length, and bare ventrally. Halter yellowish. Calypters white.

Abdomen shining black. Tergite 2 with small yellow spot posteriorly in the middle and two narrow lateral yellow stripes. Tergite 3 more than two times longer than tergite 2.

Body length 6.0 mm. Wing length 6.3 mm.

Male not known.

Etymology. We take great pleasure in naming this interesting fly of our fauna in honor of Dr. Alexander Antropov.

Figures

FIGURE 10. Neohemigaster antropovi sp. nov., female holotype; a—habitus, lateral view, b—head and thorax, dorsal view; c—head, lateral view; d—head, anterior view; e—wing.