Strongylophthalmyia armipes, 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 : 114

Strongylophthalmyia armipes , n. sp.

( Fig. 1 )

Material examined. Holotype: ♂, Malaysia, Sabah st 1660 m, Mt. Kinabalu (6.025°N, 116.59 °E), 18.II.2014, leg. N.Vikhrev . Paratype: ♂, same locality as holotype ( ZMUM) .

Diagnosis. This new species is characterized by the following combination of characters: male flagellomere unmodified, without dorsal process; fore femur without dorsal spicules; thorax and abdomen entirely black; all coxae and all femora entirely black; mesonotum matte, covered with short pale setulae presuturally, and with rows of black setae postsuturally; vein R2+3 is short: costal index = 0.7; wing with apical spot, brownish median crossband, and weak darkening in anterior part at level of R s; tarsi with two basal segments yellow and three distal segments blackish; basal process on male hind femur with three black setae and one yellowish setula.

Among Strongylophthalmyia species with black coxae, S. armipes , n. sp. can be distinguished by short pale setulae covering the presutural mesonotum, 4 (1+3) black dorsocentral setae, and by the short vein R2+3 (costal index = 0.7).

Description. Male. Head black, globose in lateral view, its length subequal to its height; frons black with small yellow spot above antenna (this spot extending posteriorly as narrow stripe along frons in paratype). Anterior width of frons about 0.7 times as long as its width at level of first ocellus, frons height equal to its anterior width; frontal index = 1.8. Occiput slightly convex (in dorsal view). Face yellowish with row of short setulae (0.04 mm) along suture. Gena with silver grey pubescence, setae absent. Scape and pedicel yellowish brown, first flagellomere dark brown, narrowly yellowish basally, about 1.2 times as long as wide; about 2.8 times as long as eye diameter; marginal setulae short (0.03 mm); arista dark brown, bare. Mouthparts dark brown, palpus brownishyellow. Two strong reclinate fronto-orbital setae, 2 short fronto-orbital setulae anteriorly to setae, 1 ocellar seta, 1 postocellar seta, 1 inner and 1 outer vertical seta.

Thorax entirely black. Mesonotum matte with thin but distinct punctation, sparsely covered with short pale setulae presuturally and with rows of black setae postsuturally; pleuron black, shining; scutellum bare, matte. One very large presutural intra-alar seta; 4 (1+3) large dorsocentral setae; acrostichal setulae situated in two rows with irregular setulae between acrostichal and dorsocentral rows, two notopleural setae, one supraalar seta, one postalar seta, one anepisternal seta, one stout apical scutellar seta and one short discal scutellar seta. All setae black.

Legs. Coxae blackish, trochanters yellow; fore femur blackish, fore tibia yellow, brownish in basal half; mid and hind femora and tibiae black; tarsi yellow, three distal segments blackish. Hind trochanter with posterior blackish tubercle; hind femur basally with round posteroventral process, without ventral setulae (male of Strongylophthalmyia papuana Iwasa & Evenhuis 2014 with three or four ventral setulae), and with smaller subbasal process bearing three black setae and one yellowish setula ( Fig. 1e ).

Wing with narrow apical spot, with median transverse band at level of dm-cu vein and with weak darkening in anterior part at level of R s. Right side of median band crossing vein R2+3. Vein R2+3 short: costal index = 0.7. Veins R4+5 and M1+2 almost parallel apically. Discal index = 2.9; medial index = 0.6. Cell bm about 0.5 times as long as cell dm. Calypter brownish grey with fan of very long light setulae on margin. Halter with darkish stem and whitish knob.

Abdomen entirely black, faintly shining, with distinct punctation.

Lengths. Body, 4.0 mm; wing, 3.3 mm.

Female unknown.

Distribution. Malaysia.

Etymology. The specific name refers to the male hind legs armed, bearing various appendages.

Figures

FIGURE 1. Strongylophthalmyia armipes n. sp. Male holotype: a—habitus, lateral view; b—head, lateral view; c—head, anterior view; d—head and thorax, dorsal view; e—hind femur; f—wing.