Teleopsis dalmanni ( Wiedemann, 1830 )

Földvári, Mihály, Pomiankowski, Andrew, Cotton, Samuel & Carr, Martin, 2007, A morphological and molecular description of a new Te l e o p s i s species (Diptera: Diopsidae) from Thailand, Zootaxa 1620, pp. 37-51 : 43-45

Teleopsis dalmanni ( Wiedemann, 1830)

( Figs 10–13 )

Diopsis dalmanni Wiedemann 1830: 560 .

Diagnosis: The most densely haired among the four species, front femur apically strongly incrassate, mid femur distally swollen. IVB up to 4–5 times as long as width of eye stalk in the middle, scutellar spines up to 4 times as long as length of scutellum. Epandrium in dorsal view wider than hypandrium. Two thick setae at the base of hypandrium. Hypandrial bridge broad and with incision at the middle.

Material examined: 5 males, 5 females taken from a laboratory culture housed at University College, London in July, 2006. This culture was founded from individuals caught in Ulu Gombak, Malaysia by Andrew Pomiankowski and Samuel Cotton in April 2005. The dried, double–mounted specimens are deposited in Hungarian Natural History Museum, Budapest.

Head: Yellow-brown, covered with brown hairs up to 3 times as long as width of eye-stalk in the middle. No facial teeth, edge rounded. OVB black twice as long as width of eye-stalk in the middle. IVB up to 4.5–5 times as long as width of eye-stalk in the middle; on a small tubercle.

Thorax: Shiny yellow, without pollinosity. Intra–alar spine (IAS) yellow, dorsoventrally flattened, blunt in dorsal view. Scutellar spines up to 4 times as long as length of scutellum.

Wing: Hyaline with only 3 bands (distal fourth is missing). Proximal band continuing in the area of the cell cup, 2nd band includes distal part of cell dm and R-M cross vein; 3rd band attaches to the 2nd along vein M.

Legs: Covered with hairs (shorter than those on the head). Coxae and femora yellow, tibiae and tarsi brown, front femora with rows of peg-like black tubercles. Front femur apically strongly incrassate, mid femur distally swollen (best seen in posterior view). Distal 2/5 of the first tarsus broad, dark brown to black ventrally on the front leg.

Praeabdomen: Tergites 1 and 2 completely yellow, first half of tergite 3 yellow, otherwise brown. Tergites 1 and 2 with brown spots dorsally in the middle; tergite 3 with grey pollinose spots on the sides. Hairs on the abdomen (as well as all over the body) very long, up to the length of the first coxa.

Genitalia: The epandrium and the cerci have long, dispersed setae along their surface. There are two thick setae and 7–10 long hairs at the base of the hypandrium, the tip of the surstyli have numerous longer hairs, more dispersed than T. thaii and T. whitei ). Surstyli broad in general, broadest among the four species ( Fig.

10). In lateral view the aedeagal apodeme is curved (as in T. whitei ), not broadened at distal one third ( Fig. 11 ). The parameres in ventral view have two long and 2–4 minute hairs ( Fig. 12 ). The hypandrium is connected to the aedeagal apodeme and the membranous tip of the hypandrium (hypandrial bridge) is clearly divided into two parts anteriorly by an incision ( Fig. 13 ). The genitalia in ventral view are narrower at the membranous part of the hypandrium than at the surstyli, i.e. the epandrium ( Fig. 13 ).

Figures

FIGURES 10 – 13. T. dalmanni male genitalia. 9: detailed ventral view with surstyli, gonopods, cerci, 10: lateral view with aedeagal apodeme, hypandrium and epandrium, 11: detailed ventral view with base of hypandrium and parameres, 12: ventral view.