Dasydorylas okongoensis, FÖLDVÁRI, MIHÁLY, 2013

FÖLDVÁRI, MIHÁLY, 2013, Taxonomic revision of the Afrotropical species of the tribe Eudorylini (Diptera, Pipunculidae), Zootaxa 3656 (1), pp. 1-121 : 29

Dasydorylas okongoensis sp. nov.

( Figs 9A–F , 39S )

Diagnosis: This species is generally dark in colour (still pale humeri), two very distinct erect hairs on t3 anteromedially and 3–4 dark spines in a row on the hind trochanters ventrally.

Type material: Namibia: 1♂, HT [# T648], Eenhana district, 29 E Okongo , 17°37’22’’S 17°28’44’’S, 14– 15.x.1999, Kirk-Spriggs Pape Hauwanga, Malaise traps, dry woodland ; 1♀, AT, same data as HT (both NMNW) ; 6♂, 3♀, PTs, same data as HT ( NMNW, except 2♂, 1♀ HNHM) .

Other material examined: Botswana: 1♂, Third Bridge , 19°14’S 23°21’E, 10.III.1993, E. Marais ( NMNW) . Namibia: 1♂, 3♀, Rundu district , 20 km E Rundu, 17°55’46’’S 19°58’43’’E, 17–18.x.1999, Kirk-Spriggs Pape Hauwanga, Malaise trap sample ( NMNW, 1♀ HNHM) . South Africa: 1♂, Kruger Nat’l. Park , Pretoriuskop, 20– 21 Feb. 1968, Krombein & Spangler ( USNM) . [these specimens were examined after the original description and type selection, therefore they are not part of the type series]

Male

Head. Third antennal segment acuminate; yellow-brown. Face silvery pollinose. Frons, upper part subshining black, lower part grey; eyes touching for distance equal to 2 times ocellar triangle. Occiput silvery pollinose, more brownish towards ocelli.

Thorax. Humeri pale brown. Mesonotum (viewed obliquely from front) subshining grey, along anterior margin more silvery; greyish from the side. Scutellum slightly silvery pollinose, with very few, weak hairs. Dorsocentral hairs short. Halter yellowish brown, stem darker.

Legs. Trochanters and base of femora dark brown, femora black (f1–2 silvery pollinose posteriorly and shining black ventrally; f3 shining black pv), knees yellow, tibiae and tarsal segments brownish yellow, last segment dark brown. Ventroapical row of 6–7 short, dark spines on first four femora; 7–8 longer spines on 3rd femur. Subapical (distal) spines on first four tibiae present. Two erect, dark anteromedial hairs on 3rd tibia. Hind trochanter with 3–4 dark spines in a row on ventral side. Pulvilli shorter than last tarsal segment.

Wing. Fourth costal section 0.7–0.8 times as long as third costal section. Cross-vein R-M just before 1/3 of discal cell. Pterostigma fully coloured. Hairs on tegula missing.

Abdomen. Viewed obliquely from front tergites subshining black, distal 1/3 of T1–4 silvery pollinose laterally, T5 grey on distal half, sides of tergites grey on distal half. Hairs dispersed, short and weakly developed. Laterally 3–4 dark spines in a row on first tergite. Postabdomen in dorsal view: T5 1.4–1.5 times as long as ST8. Genitalia without dissection: ST8 black, rectangular in dorsal view, SS and cerci yellow, m.a. as broad as 2/3 of width of ST8.

Genitalia. Surstyli symmetrical, both with median projections; epandrium with distinct shape around cerci ( Fig. 9B ). SES uncertain; gonopods subsymmetrical, both pointed at tip and with tiny hairs; hypandrium with “tubercles” on lobes; phallic guide broad in ventral view ( Fig. 9F ), pointed and with projection in lateral view ( Fig. 9A ); phallus trifid, minute spines on at least one branch and with extra structure (gonostylus?) visible in ventral view; ejaculatory apodeme rounded, club-like; sperm pump oval ( Fig. 9D ).

Female

As male except for the following characters. Frons, eyes separated; silver-grey pollinose except in front of ocellar triangle on upper 2/3 of frons. Pulvilli and claws about as long as last tarsal segment. Female ovipositor as in Fig. 39S .

Distribution— Botswana, Namibia, South Africa.

Etymology —The species' name comes from the type locality Okongo in Namibia.

Figures

FIGURE 9. Male genitalia of Dasydorylas okongoensis (A–F) and D. quasidorsalis (G–L).—A: outer surstylus with phallic guide and outer gonopod, lateral view, B: dorsal view, C: inner surstylus, lateral view, D: sperm pump with ejaculatory apodeme, E: surstyli, dorsal view, F: ventral view with phallic guide and phallus (without ST8), G: outer surstylus with phallic guide, phallus and outer gonopod, lateral view, H: dorsal view, I: inner surstylus, lateral view, J: surstyli, dorsal view, K: sperm pump with ejaculatory apodeme, L: ventral view with phallic guide (without ST8). Scale bars: 0.1 mm

FIGURE 39. Female ovipositors.—A: Eudorylas liberia, B: Eudorylas setiformis, C: Eudorylas aemulus, D: Eudorylas garambensis, E: Eudorylas remiformis, F: Eudorylas mutillatus (E. eremnoptera), G–H: Eudorylas definitus (E. excisus), I: Eudorylas facetus, J–K: Dasydorylas quasidorsalis, L: Eudorylas amuscarinum, M: Eudorylas abdominalis, N–O: Clistoabdominalis namibiensis sp. nov., P: Eudorylas mutillatus, Q: Eudorylas femoralis sp. nov., R: Eudorylas ghesquierei, S: Dasydorylas okongoensis sp. nov., T–U: Eudorylas angustus, V: Eudorylas excisus. Scale bar: 0.5 mm