Eudorylas aculeatus ( Loew, 1858 )

FÖLDVÁRI, MIHÁLY, 2013, Taxonomic revision of the Afrotropical species of the tribe Eudorylini (Diptera, Pipunculidae), Zootaxa 3656 (1), pp. 1-121 : 35-37

Eudorylas aculeatus ( Loew, 1858)

( Figs 11G–L )

Pipunculus aculeatus Loew 1858: 375 [ 1860: 355].

Diagnosis: Scutellum brown, with 4–6 longer dark hairs. Surstyli subsymmetrical, broad at tip (may be an amorphous knob); epandrium as wide as long; ST8 with small, triangular m.a.; OG longer; SES clearly visible, with 5–7 thick hairs on each side; phallic guide hairy, thick and strongly bent in ventral view, slightly curved towards SS in lateral view, tip pointed; phallus trifid, branches short, compared to phallic guide.

Type material: South Africa: 1♂, HT, Caffraria, [2 hand-written labels:] “236” and “170”, [typewritten label:] “ Pipunculus claripennis ” [leg: Wahlberg] ( NHRS) , see remarks.

Other material examined: South Africa: 1♂, RSA, Cape Prov [ince], Piekeniers-kloof , 15 km S Citrusdal, 32°38' S, 18°57' E, 370m, 04.X.1994., loc.5., leg. R. Danielsson ( ZML) ; 1♂, Cape Mountain Zebra Natl Park , 1400m, March 12 1972, ME & BJ Irwin, 3225 Ab ; 1♂, Clovelly., (Cape Peninsula ), 74.10.31, H.K. Munro .; 1♂, Wit River Valley, Cambria area, Patensie Dist. , 6.12.67, 3324DA, B&P Stuckenberg ; 1♂, Capland, Stellenbosch , Oct 8 1926, Dr. H. Brauns ; 1♂, Natal, Cathedral Peak area, Forest Reserve , 2829 Cc , 4–11.iv.1977, JGH Londt ex Malaise ; 1♂, Cape #46, helderberg Nature Res , 34º04’S: 18º52’E, 180m, Date: 4.x.1993, Colll: j. G.H. Londt, Hillside macchia veg .; 1♂, Natal #37, Royal Natal Nat. Park , 28º41’S: 28º56’E, 1440 m, Date: 23–28.iii.1991, Coll: J. G. H. Londt, forest margin malaise (all NMSA) .

Male

Head. Third antennal segment acuminate; dark brown, arista shining black. Face silvery pollinose. Frons, upper part shining black, lower part silvery pollinose with black median line; eyes touching for distance equal to 3.5 times ocellar triangle. Occiput, lower half silvery pollinose, upper half brownish.

Thorax. Humeri yellow. Mesonotum (viewed obliquely from front) brownish pollinose; silvery from the side. Scutellum brown, with 4–6 longer dark hairs. Dorsocentral hairs weakly developed, but dark hairs are present on humeri and on notopleura (12–14). Halter brown, stem yellow apically.

Legs. Trochanters and base of femora yellow, femora black with greyish pollinosity (f3 shining posteroventrally); knees, tibiae and tarsal segments yellow, last segment brown. Ventroapical row of 8–10 strong black spines on mid femora; 3–4 short hairs on 3rd femur. Subapical (distal) spines on first four tibiae strongly developed. No anteromedial hairs on 3rd tibia. Hind trochanter with 10–12 erect hairs on ventral side (as long as width of t3 at base). Pulvilli as long as last tarsal segment.

Wing. Fourth costal section 0.9 times as long as third costal section. Cross-vein R-M beyond 2/5 of discal cell. Pterostigma fully coloured. Hairs on tegula missing.

Abdomen. The HT was already dissected. Laterally 2-4 strong dark spines on first tergite. Postabdomen in dorsal view: (T6, S7, EP) visible.

Genitalia. Surstyli subsymmetrical, broad at tip (can be distinct); epandrium as wide as long; ST8 with small, triangular m.a. ( Fig. 11H ). Borders of SES clearly visible, with 5–7 thick hairs on each side; gonopods asymmetrical, OG longer; phallic guide hairy, thick and strongly bent in ventral view ( Fig. 11K ), slightly curved towards SS in lateral view, tip pointed ( Fig. 11G ); phallus trifid, branches short, compared to phallic guide; ejaculatory apodeme linear, broad at tip; sperm pump elongated ( Fig. 11J ).

Female—Unknown.

Remarks —The type for this species has been mislabelled, probably by the author after having made the descriptions for Pipunculus aculeatus and P. claripennis in Loew (1858). There is a list created by Loew himself for his identifications (courtesy of Bert Viklund, Stockholm), where he gives the numbers present on the labels of specimens and the identification belonging to the specific individual. This is 169 and 238 for P. aculeatus , but the specimen with these data is a female Tomosvaryella . Loew (1860) gives more detailed descriptions in German, and from those features (e.g. presence of the pterostigma, position of the R-M vein and the sex (male for P. aculeatus )) it is clear that the types of the two species were interchanged. The type specimens have been relabelled according to this interpretation, but original labels haven't been removed.

The type specimen was collected during a Swedish expedition to southern and south-eastern Africa led by J.A. Wahlberg. The specimen is from “Caffraria”, which refers to a large part of current South Africa. Loew 1858 (p. 375) gives the type locality as “Caffraria (Wahlb.)”, but does not mention the number of specimens he had studied.

Distribution— South Africa.

Figures

FIGURE 11. Male genitalia of Eudorylas acroapex (A–F) and E. aculeatus (G–L).—A: outer surstylus with phallic guide and outer gonopod, 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 and phallus (without ST8), G: outer surstylus with phallic guide and outer gonopod, lateral view, H: dorsal view, I: inner surstylus, lateral view, J: sperm pump with ejaculatory apodeme, K: ventral view with phallic guide and phallus (without ST8), L: surstyli, dorsal view. Scale bars: 0.1 mm