Strongylophthalmyia vikhrevi, Galinskaya & Shatalkin, 2018

Galinskaya, Tatiana V. & Shatalkin, Anatoly I., 2018, Seven new species of Strongylophthalmyia Heller, 1902 (Diptera: Strongylophthalmyiidae) from the Eastern Palaearctic and Oriental Regions with notes on peculiar rare species, Zootaxa 4402 (1), pp. 113-135 : 128-130

Strongylophthalmyia vikhrevi n. sp.

( Fig. 10 )

Material examined. Holotype: ♂, Primorsky reg., Kamenushka (43.62°N, 132.23 °E), 22–24.VI.2014, N.Vikhrev leg. ( ZMUM).

Diagnosis. This new species is characterized by the following combination of characters, which are unique to this species among all species of the genus. Male flagellomere unmodified, without dorsal process. Fore femur without dorsal spicules although stiff setulae may be present. Mesonotum entirely black shining, with rows of black and yellowish setae; dc-row includes five yellowish setae and three black setae between each yellow seta. Fore coxae yellow, brownish basally. Hind femora entirely black. Mid tibia black, narrowly brownish-yellow basally. Tarsal segments 1 and 2 yellow, segments 3̄5 dark brown. Costal index = 1. Wing with brown median crossband and apical spot. Face black; palpus dark brown or blackish.

As mentioned in the diagnosis of S. prominens n. sp. (see above), this species and S. polita are very similar to S. vichrevi n. sp. Strongylophthalmyia polita differs from S. vichrevi n. sp. by the following characters: mesonotum with the black strong setae; fore coxa yellow; vein r-m inserted in the middle of discal cell; wingmarks poorly expressed.

Description. Male. Head entirely black shining, almost as long as high. Frons widened towards vertex, frons anterior width about 0.67 times as great as its width at level of anterior ocellus, frons height about 1.3 times as long as its anterior width; frontal index equal to 1.7. Occiput poorly convex (in dorsal view). Face with row of short setulae along suture. Gena with grey tomentose setulae and golden pubescence. Antenna yellow, flagellomere slightly darkened apically, about 1.2 times as long as wide. Marginal setulae of first flagellomere short and pale; arista dark brown, bare. Palpus narrow, black with apical seta; mouthparts blackish. Frons between upper orbital and outer vertical setae without short setulae. One ocellar, one postocellar, one inner vertical, one outer vertical, three large, reclinate and five short, setula-like fronto-orbital setae.

Thorax black, shining. Basisternum without yellow spots between fore coxae. Mesonotum shining, sparsely covered with pale setulae; pleuron shining; scutellum bare matte. One dorsocentral seta, two notopleural setae, one supraalar seta, one postalar seta, one anepisternal seta, one stout apical scutellar seta, and one setula-like short lateral scutellar seta.

Legs. Coxae yellow, brownish basally; fore femur dark brown, narrowly yellow basally and apically; fore tibia yellow; mid and hind femora and tibiae dark brown; tarsi with segments 1 and 2 yellow, segments 3¯5 dark brown. Fore femur with row of long pale setae basally. Hind trochanter with posterior brownish shallow swelling; hind femur basally with a round posteroventral yellowish-brown mushroom-like process and with a smaller sub-basal process bearing five yellowish setulae ( Fig. 5e ).

Wing with narrow apical spot and median transverse band on level of dm-cu: this crossband almost undeveloped between R4+5 and M1+2. Anterior part of median band on distal side crossing connection of vein R2+3 and wing margin. Costal index = 1.2. R4+5 and M1+2 subparallel apically. Discal index = 3.2. Medial index = 0.8. Cell bm about 0.45 times as long as cell dm. Calypter brownish gray with fan of very long yellowish setulae on margin. Halter with whitish knob and brownish stem.

Abdomen black shining; abdominal segments 1 and 2 with long light setulae.

Length. Body, 3.1 mm; wing, 2.7 mm.

Female unknown.

Etymology. Named in honor of N.E. Vikhrev.

Figures

FIGURE 5. Strongylophthalmyia bukittinggiana n. sp. Female paratype: a—habitus, lateral view; b—head, anterior view; c—head, lateral view; d—head and thorax, dorsal view; e—wing.

FIGURE 10. Strongylophthalmyia vikhrevi n. sp. Male holotype: a—habitus, lateral view; b—head and thorax, dorsal view; c—head, lateral view; d—head, anterior view; e—hind femur;f—wing.