Tomosvaryella tuber Motamedinia, Skevington & Földvari, 2023

Motamedinia, Behnam, Földvari, Mihaly, Skevington, Jeffrey H. & Kelso, Scott, 2023, Revision of Australian Tomosvaryella Aczél (Diptera: Pipunculidae) with description of 100 new species, Zootaxa 5599 (1), pp. 1-271 : 218-220

Tomosvaryella tuber Motamedinia, Skevington & Földvari sp. nov.

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Figs 99A–E , 136

Diagnosis: This species can be recognized by the hind trochanter having a large, fin-shaped keel ventroapically and a small tuber-shaped protrusion ventrobasally involving two small spines at its apex; hind tibia broadened distinctly in apical half; long surstyli, widened in apical fourth in dorsal view ( Fig. 99A ); gonopods unequal, hypandrium long in ventral view ( Fig. 99B ).

Description: MALE: Body length: 2.5–2.6 mm. Head. Scape, pedicel, flagellum and arista dark, flagellum tapering, mostly gray pollinose. Face silvery pollinose. Frons, upper part shining black; lower part distinctly silver pollinose; eyes touching for distance equal to 1.3 times the length of ocellar triangle. Occiput silvery-brown pollinose. Thorax. Postpronotum pale, with 4 long pale bristles. Mesonotum (viewed obliquely from front) silvery-brown pollinose with some long supra-alar bristles behind postpronotum lobes. Scutellum silvery-brown pollinose with 8–12 short dark bristles along distal edge. Halter, knob yellow, stem and base brown. Legs. Mid coxa with 3–4 long dark bristles. Trochanters brown, femora black, silvery pollinose posteriorly except shiny hind femur; tibiae brown except knees and basal 1/6 of tibiae yellow, tarsal segments light brown. Hind trochanter with large fin-shaped keel ventroapically and a small protrusion ventrobasally involving two small spines at its apex. Two ventrobasal spines present on fore- and 3–5 shorter ones on mid femur. Hind femur with a small triangle-shaped keel ventrobasally, without ventroapical spines except 8–10 equally spaced bristles in two rows posteroventrally. Subapical (distal) spines on first four tibiae present (short). Hind tibia broadened distinctly in apical half covered by yellow erected bristles ventrobasally. Hind metatarsus slightly flattened, almost as long as 2–4 combined; all tarsomeres with erect bristles dorsally. Pulvilli covered by short yellow bristles. Wing. Length: 2.7 mm. Upper side of basal costal cell with one long dark brown bristle. Fourth costal section 3 times as long as third costal section. Cross-vein r-m at middle of discal cell. 1–2 short dark setulae on tegula. Abdomen. Viewed obliquely from front tergites brown-black, tergite 1 silvery grey. Dispersed short brown bristles on all tergites present. Lateral bristles on first tergite present, 8–10 dark bristles up to as long as ¾ of hind femur’s width at base. Genitalia. Genital capsule in dorsal view: epandrium obviously longer than wide (MLE:MWE = 1.5). Membranous area rounded. Surstyli elongated, as long as epandrium width, both surstyli slightly broadened in apical fourth and curved to each other at apex ( Fig. 99A ). Genital capsule in ventral view: gonopods unequal in height, extended towards surstyli, hypandrium long; phallic guide long; subepandrial sclerite distinct ( Fig. 99B ); Genital capsule in lateral view: both surstyli straight in basal three fourths, bent 90 ° towards sternite ( Fig. 99D–E ). Ejaculatory apodeme tube-like, bent, with a bulb in its middle ( Fig. 99C ).

FEMALE: Unknown.

Etymology: The name tuber is Latin for a swelling or bulb and refers to the bulbous protrusion on the hind trochanter.

Examined material: HOLOTYPE: AUSTRALIA: Queensland: Tinaroo Falls Dam, North Queensland, 17°11’S, 145°34’E, open savannah, 27.IV.1967, D.H. Colless, JSS8528 (1♂, ANIC) ; PARATYPES: AUSTRALIA: New South Wales: Shoalhaven Bdg. near Braidwood , 35°26’S, 149°48’E, 9.I.1968, D.H. Colless, JSS8526 (1♂, ANIC) ; Queensland: Southport , 27°59’S, 153°24’E, 29. V .1968, J.W. Boyes, JSS9702 (1♂, CNC) .

Distribution: Australia (New South Wales, Queensland) ( Fig. 136 ).

Figures

FIGURE 99. Male genitalia of Tomosvaryella tuber sp. nov. (JSS8528, ANIC) A) dorsal view, B) ventral view, C) ejaculatory apodeme, D, E) lateral view.

FIGURE 136. Distribution of Tomosvaryella pterygia sp. nov., T. tuber sp. nov., T. wyperfeldensis sp. nov. in Australia.