Dasydorylas zardouei Motamedinia & Kehlmaier, 2017

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 : 7-10

Dasydorylas zardouei Motamedinia & Kehlmaier sp. nov.

urn:lsid:zoobank.org:act:C9BA2A47-D425-4FD6-8F6C-074EAAC7219B

Figs 4–5

Differential diagnosis

Dasydorylas zardouei sp. nov. is closely related to the western Palaearctic D. holosericeus (Becker, 1897) and D. roseri (Becker, 1897) , both redescribed by Kehlmaier (2005a), to the Afrotropical D. evanidus (Hardy, 1949) , redescribed by Földvári (2013), to the Oriental D. orientalis (Koizumi, 1959) , redescribed by Kapoor et al. (1987), and, judging from the original figures, also to D. antennalis ( Kapoor et al., 1987) comb. nov. from southern India. Being morphologically hardly distinguishable from each other, the D. holosericeus species group is a good example of how challenging pipunculid taxonomy can be. The males of D. zardouei sp. nov. differ from those of the other species by a different sclerotization pattern of the gonopods and by the length of the phallus. The females can be separated by the shorter length of tergite 9 (piercer of ovipositor).

Etymology

The species is named in honour of Maryam Zardouei who collected the type series material. The surname is to be used as a noun in apposition.

Material examined

Holotype

IRAN: ♂, Kermanshah Province, Gheshlagh , 34°56′31′′ N, 46°27′54′′ E, 1533 m a.s.l., 17 Aug. 2015, Malaise trap, M. Zardouei leg. ( HMIM).

Paratypes

IRAN: 1♂, same collection data as for holotype ( HMIM); 1♂, Kermanshah Province, Dodan, 35°00′44′′ N, 46°12′27′′ E, 954 m a.s.l., 15 Jun. 2015, Malaise trap, M. Zardouei leg. ( HMIM); 1 ♂, Kermanshah Province, Sarpolezahab, 34°28′10′′ N, 45°49′31′′ E, 546 m a.s.l., 1 Jun. 2015, Malaise trap, M. Zardouei leg. ( SMTD; DNA voucher CK885, LT671746 ); 1 ♀, same collection data as preceding ( SMTD; DNA voucher CK886, LT671747 ); 1 ♀, same collection data as preceding ( HMIM).

Description

Male

BODY LENGTH. 3.1–3.5 mm (excluding antennae).

HEAD. Face dark, silver-gray pollinose. Scape dark, pedicel brown with three short upper bristles and one short lower bristle; flagellum brown, short tapering and gray pollinose (LF:WF = 2.1–2.2); arista dark, with thickened base. Eyes meeting for twelve facets ( Fig. 4B ). Frons dark, silver-gray pollinose; vertex dark, lacking pollinosity, shining black; occiput dark, gray pollinose.

THORAX. Pleura, prescutum, scutum and scutellum dark, but prescutum light yellow at lateral margin. Pleura gray pollinose. Postpronotal lobe pale, gray pollinose and with 2–3 postpronotal setae along upper margin. Prescutum and scutum gray pollinose, with two uniseriate dorsocentral rows of setae and patches of supra-alar setae. Scutellum gray pollinose, with a fringe of up to six dark setae (up to 0.1 mm). Subscutellum gray pollinose, only in dorsocentral area with some brown pollinosity.

WING. Length: 3.2–3.4 mm. LW:MWW=3.1–3.3. Wing almost entirely covered with microtrichia. Only small basal cells of wings, e.g., bc, br, bm, basal of cup cell with somewhat reduced microtrichia. Pterostigma brown and complete (LS:LTC =1.0, LTC:LFC =1.1). M 1 straight.

HALTER. Length: 0.5 mm. Base dark, stem narrowly white and knob yellow. Base and stem somewhat gray pollinose.

LEGS. Coxae dark, gray pollinose. Front and mid coxae with two dark anterior bristles. Trochanters dark, partly gray pollinose. Femora dark, distinctly yellow at apex, gray pollinose. All femora bearing two rows of dark, smaller, peg-like anteroventral spines on apical one third. Tibiae dark, with basal third and sometimes also apices pale, gray pollinose, with three rows of setae on anterior and posterior side, without apical spines. Hind tibia with some weak wrinkles midanteriorly, bearing one or two stronger bristles. Tarsi brown and paler than tibiae, gray pollinose, with some brown setae dorsally. Distitarsi dark. Pulvilli longer than distitarsi.

ABDOMEN. Ground colour dark. Tergite 1 with four to five strong lateral bristles, arranged in one row. Tergites1–5 with brown setae.Tergites1–2 gray pollinose laterally and dorsally, tergites 3–5gray pollinose laterally, extending onto dorsal surface along posterior margin. Tergite 5 symmetrical. LT35:WT5=1.5, WT5:LT5 =1.3 and T5R:T5L=1.0. Syntergosternite 8 dark, brown pollinose, without dorsal depression on side of right surstylus. LT35:WS8=2.5. Viewed laterally, as long as high (LS8:HS8 =1.0). Viewed caudally, membranous area vertically directed, broader in upper half, occupying about a third of the width of syntergosternite 8.

GENITALIA. Genital capsule in dorsal view: epandrium dark, brown pollinose and wider than long (MLE:MWE =0.8). Surstyli brown, narrowly pale at apices, brown pollinose and rather symmetrical. Both surstyli with a blocky base and a broad finger-like projection at its apical inner corner, bent outward distally by 90°; base of right surstylus slightly wider than left surstylus ( Fig. 5G ). Genital capsule in ventral view: gonopods minute and symmetrical, with elongated regions of distinctly stronger sclerotization ( Fig. 5A ); phallus trifid, straight and short (almost reaches apex of surstyli), with a membranous nose at base ( Fig. 5B ); phallic guide narrow and straight, with two dorsolateral spines at the end of basal half on either side ( Fig. 5C ). Genital capsule in lateral view: epandrium without projecting lobe on either side. Both surstyli in basal half broad, in apical half narrowed to form a finger-like process which is bent towards the sternites by 90° ( Fig. 5 F–G). Phallic guide bow-like bent towards surstyli ( Fig. 5C ). Ejaculatory apodeme funnel-shaped ( Fig. 5D ).

Female ( Figs 4 C–D, 5H–I)

BODY LENGTH. 3.2 mm (excluding antennae).

HEAD. Scape dark, with two upper bristles. Pedicel with three to four short upper bristles and a pair of short lower bristles. Flagellum paler than pedicel and long, tapering. LF:WF =3.1. Eyes separated ( Fig. 4D ). Front facets enlarged (0.05 mm). Frons dark, lower half silver-gray pollinose, otherwise shining. Frons with a weak median keel, ending in a tubercle shortly before antenna. Occiput gray pollinose.

THORAX. Postpronotal lobe light yellow, gray pollinose with some light brown bristles. Pleura, prescutum, scutum and scutellum dark, gray pollinose.

WING. Length: 3.1 mm. LW:MWW=3.3. Pterostigma brown and complete (LS:LTC=1.0, LTC:LFC= 0.8).

LEGS. Hind coxa paler and larger than fore and mid coxae, with 4–6 black or brownish bristles. Mid femur with two small ventral rows of dark peg-like spines on apical half. Tibiae light brown, distinctly darkened on apical half, without apical spines. Pulvilli longer than distitarsi.

ABDOMEN. Tergites 1–5 gray pollinose laterally, extending onto dorsal surface along posterior margin. Tergites 2–5 with dark scattered bristles.

OVIPOSITOR. Base of ovipositor dark, dorsally with some gray pollinosity. Viewed dorsally ( Fig. 5H ), base rather rectangular, without a median longitudinal furrow, longer than wide. Anal opening ovate. Suture between tergite 7 and 8 hardly visible. Piercer yellowish-brown. Proximal part of piercer narrow and triangular. Viewed laterally ( Fig. 5I ), base of piercer slightly curved, piercer straight and as long as base. LP:LB= 1.0. LDP:LPP=1.9.

Distribution

Iran.

Figures

Fig. 4. Dasydorylas zardouei Motamedinia & Kehlmaier sp. nov. A–B. ♂, holotype. A. Lateral view. B. Dorsal view. C–D. ♀, paratype. C. Lateral view. D. Dorsal view. Scale bars: 1 mm.

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.