Revision of Australian Tomosvaryella Aczél (Diptera: Pipunculidae) with description of 100 new species
Motamedinia, Behnam
Földvari, Mihaly
Skevington, Jeffrey H.
Kelso, Scott
Zootaxa
2023
2025-03-05
5599
1
1
271
Foldvari, Skevington & Motamedinia
Foldvari, Skevington & Motamedinia
2023
[151,955,151,178]
Insecta
Pipunculidae
Tomosvaryella
Animalia
Diptera
21
22
Arthropoda
species
angustistyla
sp. nov.
Figs 6A–D, 109, 149F, 156A
Diagnosis:This species can be recognized by the hind trochanter with a keel covering 2–3 short dark spines at the proximal end ( Fig. 149F); elongated surstyli in dorsal view ( Fig. 6A); extended gonopods towards surstyli, left longer than right one; distinct subepandrial sclerite with fin-shaped projection; phallic guide with 5–6 dorso-dorsolateral spines in ventral view ( Fig. 6B); left surstylus narrowed in apical half in lateral view ( Fig. 6C).
Description: MALE:Body length: 2.6–2.7 mm. Head. Flagellum acuminate; yellow-brown. Face silvery pollinose. Frons, upper part shining black; lower part distinctly silver pollinose; eyes touching for distance equal to 1.5 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) silvery pollinose, anterior part more grey, grayish also from the side. Scutellum silvery brown pollinose and with 5–7 bristles along distal edge. Dorsocentral bristles short, dark, longer in frontal half, a few pale bristles around postpronotum present. Halter, knob pale, stem brown. Legs. Mid coxa with 2–3 long dark bristles. Trochanters brown, femora black, shining ventrally, silvery pollinose posteriorly except shiny hind femur; knees and basal 1/5 of tibiae yellow (tibiae otherwise brown), tarsal segments brown dorsally, yellow ventrally, last segment darker. Hind trochanter with 45 degree keel, 2–3 short dark spines at the proximal end ( Fig. 149F); ventrobasal spines absent on fore and mid femur. Ventroapical row of spines on fore femur missing; 4–7 distinct, black spines on mid femur; hind femur without ventroapical spines, except 10–12 equally spaced bristles posteroventrally, longer on distal half, longest up to 1/3 the width of hind tibia at distal end. Subapical (distal) spines on first four tibiae present (short). Hind tarsomeres flattened (especially hind metatarsus on distal half), hind metatarsus as long as 2–3 combined. Pulvilli shorter than last tarsal segment. Wing. Length: 2.7 mm. Upper side of basal costal cell with one long dark brown bristle. Fourth costal section 2–2.5 times as long as third costal section. Cross-vein r-m at middle of discal cell. 2–3 short dark setulae on tegula. Abdomen. Viewed obliquely from front tergites subshiny, brown-black, tergite 1 silvery grey, silvery pollinose spots on tergites 4 and 5 (spot on tergite 5 larger). Dispersed strong dark bristles on all tergites present, longest on tergite 5 inlength up to 1/4 the width of hind tibia at distal end. Lateral bristles on first tergite present, 4–6 dark bristles up to as long as ¾ of hind femur’s width at base. Postabdomen in dorsal view: T6, S7 invisible; T5 1–1.2 times as long as ST8. Genitalia without dissection: ST8 small to medium sized, round, globular, brown and with distinct bristles, otherwise with velvet-like coverage; membranous area is round, mostly directed posteriorly; epandrium brown, surstyli brown. Genitalia. Genital capsule in dorsal view: epandrium longer than wide (MLE:MWE = 1.2). Surstyli elongated, symmetrical, left surstylus longer than right one and wider at apex, right surstylus with a distinct triangle-shaped protrusion at inner margin before apex ( Fig. 6A). Genital capsule in ventral view: both gonopods extended towards surstyli, left is longer than right one, right one with a projection on inner margin; phallic guide with 5–6 dorso- dorsolateral spines, one spine longer than others; subepandrial sclerite distinct with a small fin-shaped protrusion extended from basal to its center ( Fig. 6B); genital capsule in lateral view: both surstyli curved towards sternite, left surstylus narrowed in apical half ( Fig. 6C). FEMALE:Body length: 2.5 mm.As male except for the following characters. Frons, eyes separated, as wide as 1.2–1.4 times the width at antennae; completely silver-grey pollinose on lower 1/3, shiny black only around directly ocellar triangle, smooth change in transition zone (just before ocellar triangle) to shiny black. Enlarged ommatidia silvery shining. Pulvilli and claws about 1.5–2.0 times as long as last tarsal segment, smaller on metatarsi. Female abdomen with silver spots on sides of tergites 4–6; Ovipositor.Straight in ventral view, straight, dagger-like in lateral view (yellow piercer, brown base), reaching distal end of 2nd segment; base silvery brown pollinose with dispersed short dark bristles. LP:LB = 1.3. LDP:LPP = 4.30. ( Fig. 156A).
Etymology:From the Latin angustus, narrow, in reference to the narrowed left surstylus. Examined material: HOLOTYPE: AUSTRALIA: Western Australia: Millstream-Chichester Nat[ional] P[ark], Roebourne Road, 21°26’S, 117°9’E, 337m, sandy creek, Eucalyptus Spinifexgrassland, 27.IV–3.V.2003, C. Lambkin & T. Weir, Malaise trap, JSS16196 ( 1♂, WAM); PARATYPES: AUSTRALIA: Western Australia: 158 kmS Newman, 9 kmN Kumarina Road House, 24°38’S, 117°37’E, 638m, wide sandy wash, 7–18.V.2003, M.E. Irwin & F.D. Parker, Malaise trap, JSS15726 ( 1♂, CNC); 171 kmEast of Marble Bar, 21°17’S, 121°14’E, 300m, dry wash with flowers, 2–15.V.2003, M.E. Irwin & F.D. Parker, Malaise trap, JSS15870, JSS15872 ( 2♀, CNC); Karijini National Park, Karijini Drive, 22°34’S, 118°18’E, 814m, open Eucalyptusgrassland, 19–25.IV.2003, C. Lambkin & T. Weir, Malaise trap, JSS16222–3 ( 1♂, 1♀, ANIC).
Distribution: Australia( Western Australia) ( Fig. 109). Notes:This species appears to be a Western Australian endemic and is found in Eucalyptusdominated habitats to desert washes. Based on the DNA sequences, this species is genetically close to T. patula sp. nov.(6.7% pairwise divergence). Intraspecific genetic distance ranges from 0.2% to 1.4% (Supplementary file 3).