Dasydorylas Skevington, 2001

Motamedinia, Behnam, Kehlmaier, Christian, Mokhtari, Azizollah, Rakhshani, Ehsan & Gilasian, Ebrahim, 2017, The genus Dasydorylas Skevington in Iran, with the description of two new species (Diptera: Pipunculidae), European Journal of Taxonomy 362, pp. 1-13 : 11

Key to males of West-Palaearctic Dasydorylas Skevington, 2001

For generic identification, follow the key in Kehlmaier (2005a) to couplet 18.

1 Abdominal tergites densely covered with rather long bristly hairs (♂♂: up to 0.07 mm). (Dorso-) lateral fan of tergite 1 with about 13 strong, dark bristles of different length. Male genitalia as in Kehlmaier 2005a: fig. 15a–h .................................................................... D. horridus (Becker, 1897)

– Abdominal tergites less densely covered with shorter hairs (up to 0.05 mm). (Dorso-) lateral fan of tergite 1 with about 8 bristles at the most.....................................................................................2

2 Flagellum extremely long tapering, filiform (LF:WF>5.5) ( Kehlmaier 2005a: fig. l8i). Syntergosternite 8 without membranous area. Eyes meeting for about ten times diameter of ocellus. F:EM= 1:0.5–0.6. LTC:LFC =0.6–0.8. Surstyli and genitalia as in Kehlmaier 2005a: fig. 18a–h ....... ............................................................................................................... D. filiformis Kehlmaier, 2005

– LF:WF<4.0. Syntergosternite 8 with membranous area. Eyes meeting for 15 to 20 times diameter of ocellus. F:EM=1:1.0–1.2. LTC:LFC>1.6.....................................................................................3

3 Scutellar hair fringe with 6 very strong bristles (up to 0.2 mm). Flagellum very long, tapering (LF:WF=3.7–3.9) ..................................................................................... D. setosus (Becker, 1908)

– Scutellar hair fringe with up to 14 shorter bristles (up to 0.07 mm). Flagellum shorter (LF:WF= 2–2.3).................................................................................................................................................4

4 Phallic guide with up to 14 long spines on each side, pointing upwards into different directions. Each surstylus distally with a single outward bent finger-like projection ( Kehlmaier 2005b: fig. 12i) ........................................................................................................... D. gradus Kehlmaier, 2005

– Phallic guide with less than 10 long spines on each side...............................................................5

5 Phallic guide with 8 downwards directed long spines on each side. Each surstylus with a pair of finger-like projections which are bent towards each other ( Fig. 3E ) ......................................... ..................................................................... D. derafshani Motamedinia & Kehlmaier sp. nov.

– Phallic guide with only 2 spines on each side.................................................................................6

6 Gonopods with elongated regions of distinctly stronger sclerotization ( Fig. 5A ). Phallus short and length of ejaculatory ducts shorter than length of surstyli ......................................................... ............................................................................... D. zardouei Motamedinia & Kehlmaier sp. nov.

– Gonopods without elongated regions of stronger sclerotization. Ejaculatory ducts of phallus longer than surstyli.......................................................................................................................................7

7 Dorsolateral spines of phallic guide rather strong, situated at end of basal half ( Kehlmaier 2005a: fig. 14a–b). Surstyli as in Kehlmaier 2005a: fig. 14d, j–k. Phallus with long ejaculatory ducts ( Kehlmaier 2005a: fig. 14h). Membranous area occupies about half the width of syntergosternite 8 ( Kehlmaier 2005a: fig. 14e) .............................................. D. holosericeus (Becker, 1897)

– Dorsolateral spines of phallic guide somewhat smaller and situated after basal third ( Kehlmaier 2005a: fig. 16a–b). Surstyli as in Kehlmaier 2005a: fig. 16d, j–k. Phallus with shorter ejaculatory ducts ( Kehlmaier 2005a: fig. 16h). Membranous area occupies about a third of the width of syntergosternite 8 ( Kehlmaier 2005a: fig. 16f) ............................................................ D. roseri (Becker, 1897)

Figures

Fig. 3. Terminalia of Dasydorylas derafshani Motamedinia & Kehlmaier sp. nov., ♂, paratype.A. Phallic guide, gonopods and hypandrium in ventral view. B. Phallus and membranous sheet in lateral view. C. Phallic guide in lateral view. D. Ejaculatory apodeme. E. Surstyli in dorsal view. F. Left surstylus in lateral view. G. Right surstylus in lateral view.

Fig. 5. Terminalia of Dasydorylas zardouei Motamedinia & Kehlmaier sp. nov. A–G. ♂, holotype. A. Phallic guide, gonopods and hypandrium in ventral view. B. Distiphallus with ejaculatory ducts in lateral view. C. Phallic guide in lateral view. D. Ejaculatory apodeme. E. Surstyli in dorsal view. F. Left surstylus in lateral view. G. Right surstylus in lateral view. – H–I. ♀, paratype. H. Ovipositor in dorsal view. I. Ovipositor in lateral view.