Tomosvaryella millstreamensis 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 : 143-145

Tomosvaryella millstreamensis Motamedinia, Skevington & Földvari sp. nov.

urn:lsid:zoobank.org:act:BAFBA3B7-C458-4F85-A6D2-A9D91B95F3E9

Figs 64A–E , 129

Diagnosis: This species can be recognized by the triangle-shaped of the cerci in lateral view ( Fig. 64D–E ); hind trochanter with a small keel and some short bristles ventromedially; small surstyli, both surstyli constricted in apical third at inner margin in dorsal view ( Fig. 64A ); left gonopod slightly longer, right one wider, both gonopods with a short finger-like projection laterally; phallic guide with some different-sized spines dorso- dorsolaterally; subepandrial sclerite and hypandrial apodeme distinct ( Fig. 64B, D–E ).

Description: MALE: Body length: 3.2–3.5 mm. Head. Scape and pedicel dark brown. Pedicel with 2–3 upper bristles; flagellum light brown, gray pollinose and tapering. Face silvery pollinose. Frons, upper part shining black; lower part distinctly silver pollinose; eyes touching for distance equal to 2.5–3 times the length of ocellar triangle. Occiput grey pollinose, covered by short dark bristles. Thorax. Postpronotum light yellow, with 3–5 light brown bristles in upper margin. Mesonotum (viewed obliquely from front) silvery-brown pollinose, anterior part greyer; scutum with scattered bristles at anterior supra-alar area. Postalar callus dark brown with a batch of (3–5) pale bristles in its middle. Scutellum black, silvery pollinose with 10–12 short bristles along distal edge. Halter, knob pale, stem light brown. Legs. Mid coxa with 4–5 long dark bristles, two longer than others. Coxae, trochanters, femora dark brown, hind femur shining ventrally, knees and basal 1/4 of tibiae yellow (tibiae otherwise brown), tarsomeres yellow ventrally and light brown dorsally, last segment darker. Mid trochanter with two short bristles ventroapically. Hind trochanter silvery pollinose, with a small keel and 3–6 short bristles ventromedially; ventrobasal spines absent on fore and mid femur, two rows ventroapical spines present. Hind femur with two rows ventroapical spines. Tibiae with two rows of short black bristle on anterior and three rows on posterior side. Hind tarsomeres distinctly flattened (especially tarsomeres 1–4), hind metatarsus as long as 2–4 combined; posterior corners with distinct bristles on all tarsomeres. Pulvilli shorter than last tarsal segment. Wing. Length: 3.5 mm. Upper side of basal costal cell with one short dark brown bristle and 2–3 longer light brown bristles. Fourth costal section 1.5–2 times as long as third costal section. Cross-vein r-m at middle of discal cell. 3–4 short dark setulae on tegula. Abdomen. Tergites 1 silvery pollinose; tergite 2–5 grey-brown pollinose with scattered short dark bristles (more on tergite 5). Lateral bristles on first tergite present, 7–10 long brown bristles up to as long as hind femur’s width at base; sternite 2 with 3–6 small dark spines in the middle of posterior margin. Syntergosternite 8 enlarged, dark brown and grey pollinose. Membranous area long and broad in middle with a triangular edge close to cerci in lateral view; cerci triangle-shaped in lateral view. Genitalia. Genital capsule in dorsal view: epandrium wider than long (MLE:MWE = 0.6). Surstyli asymmetrical, small, left surstylus longer than right one, right surstylus with a triangular edge at inner margin before apex, both surstyli constricted in apical third at inner margin ( Fig. 64A ). Genital capsule in ventral view: gonopods rather unequal in height, left gonopod slightly longer, right one wider than left one, both gonopods with a short finger-like projection laterally; phallic guide with 2–3 different-sized spines dorso- dorsolaterally, one is longer than others; subepandrial sclerite and hypandrial apodeme distinct ( Fig. 64B ); Genital capsule in lateral view: both surstyli widened, strongly curved towards sternite, left surstylus moderately narrowed after basal half ( Fig. 64D–E ); ejaculatory apodeme tube-like, bent, with a bulb in its middle ( Fig. 64C ).

FEMALE: unknown.

Etymology: This species is named after the type locality, Millstream-Chichester National Park. This park is particularly diverse for Tomosvaryella species with 17 species recorded, all of them undescribed until now.

Examined material: HOLOTYPE: AUSTRALIA: Western Australia: Millstream-Chichester Nat[ional] P[ark], Narrina Pool, 21°21’S, 117°16’E, 159m, rocky creek bed, Eucalyptus , 7–12.V.2003, C. Lambkin & D. Yeates, Malaise trap, JSS16186 (1♂, WAM); PARATYPES: AUSTRALIA: Western Australia: Karijini National Park, Karijini Drive , 22°34’S, 118°18’E, 814m, open Eucalyptus grassland, 25.IV–14.V.2003, C. Lambkin & T. Weir, Malaise trap, JSS15581, JSS15583, JSS15584 (3♂, ANIC); 22°34’S, 118°18’E, 815m, across dry gully, Acacia scrub, 19–25.IV.2003, JSS16157, (1♂, CNC); Millstream-Chichester National Park, Narrina Pool, 21°21’S, 117°16’E, 159m, rocky creek bed, Eucalyptus , 7–12.V.2003, C. Lambkin & D. Yeates, Malaise trap, JSS16182– 5, JSS16187 (4♂, ANIC; 1♂, QM); beside bank of rocky creek bed, Eucalyptus , 27–30.IV.2003, C. Lambkin & T. Weir, Malaise trap, JSS16192 (1♂, ANIC); Millstream-Chichester National Park, Roebourne Road, 21°26’S, 117°9’E, 337m, sandy creek, Eucalyptus Spinifex grassland, 7–12.V.2003, C. Lambkin & D. Yeates, Malaise trap, JSS15569, JSS15571–2 (3♂, ANIC); 21°20’S, 117°11’E; 21°26’S, 117°9’E, 360m; 337m, Spinifex with scattered Acacia & Eucalyptus ; sandy creek, Eucalyptus Spinifex grassland, 27.IV–3.V.2003, C. Lambkin & T. Weir, Malaise trap, JSS16072–3, JSS16198, JSS16261–3 (6♂, ANIC); Millstream-Chichester National Park, Black Hill Pool, 21°20’S, 117°15’E, 176m, across wide dry rocky creek bed, Eucalyptus , 30.IV–3.V.2003, C. Lambkin & T. Weir, Malaise trap, JSS16043 (1♂, ANIC).

Distribution: Australia (Western Australia) ( Fig. 129 ).

Notes: This species has only been found in Millstream-Chichester National Park and Karijini National Park in Western Australia. No specimens have been found hilltopping. Intraspecific genetic distance ranges from 0.0% to 1.0%. It is genetically most similar to T. tribula sp. nov. (0.8–2.5% pairwise divergence) (Supplementary file 3).

Figures

FIGURE 64. Male genitalia of Tomosvaryella millstreamensis sp. nov. (JSS16187, ANIC) A) dorsal view, B) ventral view, C) ejaculatory apodeme, D, E) lateral view.

FIGURE 129. Distribution of Tomosvaryella leimonias, T. millstreamensis sp. nov., T. moffattensis sp. nov. in Australia.