Dasydorylas quasidorsalis
Creators: name: FÖLDVÁRI, MIHÁLY
Publisher: name: Zenodo
Year: 2013
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Pipunculidae
Dasydorylas
Dasydorylas quasidorsalis

description: Dasydorylas quasidorsalis (Hardy, 1961)
(Figs 9G–L, 39J–K)
Dorilas (Eudorylas) quasidorsalis Hardy 1961: 145.
Diagnosis: Fourth costal section very short (0.5 times the length of C3). Femora and tibiae dark brown to black. SES with 12–14 little spines; gonopods symmetric, with 1–2 minute hairs on each side; phallic guide pointed, with 2 spines; phallus longer than SS, curved.
Type material: Democratic Republic of Congo: 1♂, HT, Congo belge, P.N.G., Miss[ion] H. De Saeger, II/fd/18, 21-xii-1951, Rec. H. De Saeger 2939; 1♀, AT, same as HT, II/gd/4, 22-viii-1952, No. 3964; 1♀, PT, same as HT, II/fd/17, 28-i-1952, No. 3067; 1♀, PT, same as HT, II/gd/10, 8-viii-1952, No. 3909 (all MRAC); 1♀, PT, same as HT, II/gc/8, 30-iv-1952, No. 3402, I.G. 24.203 (ISNB).
Male
Head. Third antennal segment acuminate; brown. Face greyish pollinose. Frons, upper part black, lower part with black triangle in the middle, otherwise greyish pollinose; eyes touching for distance equal to 3.5–4 times ocellar triangle. Occiput, upper half brownish, lower half greyish pollinose.
Thorax. Humeri pale brown. Mesonotum (viewed obliquely from front) brownish pollinose, along anterior margin with 2 greyish patches; brown from the side with grey pollinosity. Scutellum with faint brownish pollinosity, two bristle-like hairs. Dorsocentral hairs uncertain. Halter: knob and basal half of the stem black, yellow distally.
Legs. Trochanters and base of femora dark brown, femora black (f3 shining posteroventrally), knees yellowish brown, tibiae black (yellow at tip). Tarsal segments yellow-brown, last segment darker. Ventroapical row of 6–7 strong, short spines on first four femora (first four legs missing on HT); 4–5 weak hairs on 3rd femur. Subapical (distal) spines on first four tibiae present. One bristle-like anteromedial hair on 3rd tibia. Hind trochanter greyish pollinose with 3–4 fine pale hairs on ventral side. Pulvilli slightly longer than last tarsal segment.
Wing. Fourth costal section 0.5 times as long as third costal section. Cross-vein R-M beyond 1/3 of discal cell. Pterostigma almost fully coloured. 2–3 hairs on tegula.
Abdomen (most parts dissected). Hairs dispersed, short and weakly developed. Lateral spines on first tergite: 1 dark brown bristle. Postabdomen in dorsal view: (T6, S7, EP) visible.
Genitalia. Surstyli subsymmetrical; ST8 slightly enlarged, m.a. wide, slit-like (Fig. 9H). SES borders not clear, with 12–14 little spines; gonopods symmetric, with 1–2 minute hairs on each side (Fig. 9L); phallic guide pointed, with 2 spines; phallus longer than SS, curved (Fig. 9G); ejaculatory apodeme and sperm pump both funnel-shaped (Fig. 9K).
Female
As male except for the following characters. Frons, eyes separated; shining black, except basal part (close to antennae), which is greyish pollinose (for length of ocellar triangle). Trochanter more shiny, but also with white hairs. Fourth costal section on wing equal to third. Halter yellow-brown, base darker. Abdominal T1,2 greyish pollinose, other tergites black with brownish pollinosity; hind margins of T3–5 brownish pollinose; sides with grey patches. T1 with 4–5 black bristles. Female ovipositor as in Figs 39J–K.
Distribution— Democratic Republic of Congo.
description: Published as part of FÖLDVÁRI, MIHÁLY, 2013, Taxonomic revision of the Afrotropical species of the tribe Eudorylini (Diptera, Pipunculidae), pp. 1-121 in Zootaxa 3656 (1) on pages 29-31, DOI: 10.11646/zootaxa.3656.1.1, http://zenodo.org/record/6039126