Tomosvaryella lambkinae Földvari, Skevington & Motamedinia sp. nov.

urn:lsid:zoobank.org:act: D6CA6298-C379-4EC9-BCEE-12376D745C22

Figs 51A–E, 126,147A

Diagnosis: This species can be recognized by having the hind trochanter without a keel, but with some dark spines in a row ventrobasally (Fig. 147A); hind femur with some long bristles posteriorly (Fig. 147A); elongated surstyli in dorsal view (Fig. 51A); gonopods elongated towards surstyli with two small projection towards phallus (Fig. 51B); phallic guide with six spines dorsolaterally; subepandrial sclerite elongated in ventral view (Fig. 51B).

Description: MALE: Body length: 3.3 mm. Head. Flagellum short acuminate; yellow. Face silvery pollinose. Frons, upper part shining black, lower part distinctly silver pollinose; eyes touching for distance equal to 2.5 times the length of ocellar triangle. Occiput silvery pollinose, less so on upper 1/3. Thorax. Postpronotum pale, with 3–4 distinct pale bristles. Mesonotum (viewed obliquely from front) brownish pollinose, anterior part silver pollinose, slightly grayish also from the side. Scutellum brownish pollinose and with 6–8 weak bristles along the distal edge. Dorsocentral bristles indistinctly developed, dark, more visible on frontal part and numerous dark bristles around postpronotum. Halter, knob pale with brownish spot at tip, stem brown. Legs. Mid coxa with two long and one short bristles. Trochanters and femora black, shining ventrally, silvery pollinose posteriorly except shiny hind femur; knees, basal 1/5 and distal 1/6 of tibia yellow (tibia otherwise brown), tarsal segments yellow dorsally, whitish yellow ventrally, last segment brown dorsally. Fore and mid trochanters with 1–2 dark anterior bristles. Hind trochanter without a keel, but with dark spines (22–24) in a row ventrobasally (Fig. 147A). Ventroapical row of spines on fore femur 4–5 indistinct; 8–10 very short, black spines on mid femur; no spines on hind femur, hind femur with only 22–24 pale bristles equally spaced posteriorly, longer on distal half (longest up to as long as 1–1.2 times the width of hind tibia at the distal end) (Fig. 147A). Subapical (distal) spines on first four tibiae present (medium sized); ventrobasal spines (1) present on fore and absent on mid femur. Hind metatarsus flattened almost as long as 2–5 combined, with dorsal bristles missing in the middle, arranged in rows along the edges; with scrub-like bristles ventrally. Pulvilli as long as or slightly longer than last tarsal segment. Wing. Length: 3.1 mm. Upper side of basal costal cell with one dark and long bristles. Fourth costal section 3 times as long as third costal section. Cross-vein r-m at middle of discal cell. 10–11 dark setulae on tegula, mostly along the distal edge. Abdomen. Dissected. tergite 1 silvery grey. Lateral spines on first tergite present, 6–8 brown bristles in a double row up to as long as the width of hind femur at distal tip in lateral view. Postabdomen in dorsal view: Dissected. Genitalia without dissection: Dissected. Genitalia. Genital capsule in dorsal view: surstyli rather symmetrical, broadened at base, slenderized after basal third. Left surstylus longer than right one (Fig. 51A). Genital capsule in ventral view: gonopods unequal, left slightly longer than right one, elongated towards sternite, with two small projections extended towards phallus; lobes of hypandrium sclerotized, subepandrial sclerite elongated and covered with transverse streaks; phallic guide with six spines dorsolaterally (three left spines longer than others; the longest one twice as length as others) (Fig. 51B); Genital capsule in lateral view: both surstyli gently curved toward sternite (Fig. 51D–E). Ejaculatory apodeme tube-like, bent, with a bulb in its middle (Fig. 51C).

FEMALE: Unknown.

Etymology: This species is named in honour of Christine Lambkin, who collected the only known specimen and is a major contributor to Australian Diptera research. Chris collected or was involved in collecting 26% of the known Australian Tomosvaryella specimens and 58 percent of the Tomosvaryella species treated in this paper, making her the top contributor to our knowledge of this genus in Australia (Supplementary file 2). This revision clearly could not have been completed without her input.

Examined material: HOLOTYPE: AUSTRALIA: Western Australia: Pine Hill, Cape Arid N [ational] P[ark], Balladonia Road, 33°18’S, 123°22’E, 130m, mallee woodland, 31.x–18.xi.2003, C. Lambkin & J. Recsei, Malaise trap, JSS15593 (1♂, QM).

Distribution: Australia (Western Australia) (Fig. 126).

Notes: The only known specimen was collected in mallee habitat (a dry, savanna-like habitat dominated by shrubby species of Eucalyptus). Based on the DNA sequencing, this species is genetically most similar to T. ngarrbekiota sp. nov. (7.7–13.6% pairwise divergence) (Supplementary file 3).