Dasydorylas africanus ( Lindner, 1956 )

FÖLDVÁRI, MIHÁLY, 2013, Taxonomic revision of the Afrotropical species of the tribe Eudorylini (Diptera, Pipunculidae), Zootaxa 3656 (1), pp. 1-121 : 23

Dasydorylas africanus ( Lindner, 1956)

( Figs 7A–F )

Dorylas africanus Lindner 1956: 50 — comb. nov.

Diagnosis: The wing's fourth costal section is 0.4 times as long as third costal section. Three to four erect anteromedial hairs on 3rd tibia. ST8 enlarged compared to epandrium, m.a. broad; phallic guide has parallel sides in ventral view, slightly curved and pointed in lateral view; phallus with teeth on one of the branches.

Type material: Tanzania: 1♂, HT, Msingi, 22.–28.I.1952, D.O. Afrika Exp. [collected by E. Lindner] ( SMNS) .

Other material examined: Kenya: 1♂, N. Nairobi, Karura Forest , 1°14’S, 36°50’E, 5,500 ft., 15.i.1972, C.F. Huggins, B.M. 1972–468 ( BMNH) . South Africa: 1♂, Cape Prov., Alexandria For. Res., 3326DA, 28.xii.1985, J & B Londt, Forest & forest margins ( NMSA) .

Male

Head. Third antennal segment acute; dark brown. Face brownish pollinose. Frons, upper part shining black, lower part brownish pollinose along margins, shining black in the middle; eyes touching for distance equal to 4 times ocellar triangle. Occiput, lower half brownish pollinose, upper half subshining black.

Thorax. Humeri black. Mesonotum (viewed obliquely from front) brownish pollinose; also brownish from the side. scutellum brown, with 6–7 pairs of pale hairs. Dorsocentral hairs weakly developed, notopleuron with several pale setae. Halter black stem slightly paler.

Legs. Entirely dark brown, black (f3 shining posteroventrally). Ventroapical row of 4–8 short, dark spines on first four femora; no spines or hairs on 3rd femur; f2 with a distinct row of 15–17 brown hairs posteriorly (as long as width of femur at base). Subapical (distal) spines on first four tibiae missing. Three to four erect anteromedial hairs on 3rd tibia. Hind trochanter with 5–6 pale hairs on ventral side. Pulvilli shorter than last tarsal segment.

Wing. Brownish in general; fourth costal section 0.4 times as long as third costal section. Cross-vein R-M well beyond 2/5 of discal cell. Pterostigma fully coloured. Hairs on tegula missing.

Abdomen. Viewed obliquely from front tergites completely black with brownish pollinosity, abdomen narrows distally. Hairs missing, laterally 3–4 black hairs on first tergite. Postabdomen in dorsal view: T5 3 times as long as ST8. Genitalia without dissection: small, black; m.a. as wide as 2/3 of width of ST8.

Genitalia. Surstyli almost symmetrical; ST8 enlarged compared to epandrium, m.a. broad ( Fig. 7B ). SES uncertain; gonopods subsymmetrical; hypandrium with broadened lobes, apodeme visible; phallic guide with parallel sides in ventral view, slightly curved and pointed in lateral view ( Fig. 7F ); phallus trifid with teeth on one of the branches and with membranous supporting structure ( Fig. 7A ); ejaculatory apodeme short, linear; sperm pump round ( Fig. 7E ).

Female—Unknown.

Remarks —Formerly listed as a generically unplaced species of Pipunculidae in De Meyer (1996) , but i place this species in Dasydorylas based on the presence of a membranous area on ST8, surstyli being curved towards the phallic guide, and the subepandrial sclerite being covered with setae at its connection with the surstyli.

Distribution— Kenya, South Africa, Tanzania.

Figures

FIGURE 7. Male genitalia of Dasydorylas africanus (A–F) and D. bodocsi sp. nov. (G–K).—A: outer surstylus with phallic guide and phallus, lateral view, B: dorsal view, C: inner surstylus, lateral view, D: surstyli, dorsal view, E: sperm pump with ejaculatory apodeme, F: ventral view with phallic guide (without ST8), G: outer surstylus with phallic guide and outer gonopod, lateral view, H: dorsal view, I: inner surstylus, lateral view, J: surstyli, caudodorsal view, K: ventral view with phallic guide and phallus (without ST8). Scale bars: 0.1 mm