Dasydorylas derafshani Motamedinia & Kehlmaier,

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: 4-6

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Dasydorylas derafshani Motamedinia & Kehlmaier

sp. nov.

Dasydorylas derafshani Motamedinia & Kehlmaier  sp. nov.


Figs 2–3View FigView Fig

Differential diagnosis

Dasydorylas derafshani  sp. nov. is closely related to D. setosus (Becker, 1908)  , redescribed by Kehlmaier (2005a) and known from the Canary Islands, Morocco and Spain, and to D. gradus Kehlmaier, 2005  , described from Israel by Kehlmaier (2005b). The males of all three species have long spines at the apex of the phallic guide that differ in number and direction between species, with D. derafshani  sp. nov. having eight downward directed spines on either side. Additional diagnostic characters are the differently shaped surstyli and, compared to D. setosus  , the shorter and more pilose scutellar hair fringe.


This species is named in honour of Hossein Ali Derafshan, who collected the type series material. The surname is to be used as a noun in genitive case.

Material examined


IRAN: ♂, Sistan-o Baluchestan Province , Zabol County, Zabol, 31°55′10′′ N, 61°31′17′′ E, 485 m a.s.l., 14 May 2015, Malaise trap, H.A. Derafshan leg. ( HMIM).



IRAN: 1 ♂, Sistan-o Beluchestan Province, Zabol County, Zabol, 31°05′04′′ N, 61°26′04′′ E, 482 m a.s.l., 22 Apr. 2015, Malaise trap, H.A. Derafshan leg. ( SMTD; DNA voucher CK863, LT626249View Materials); 1 ♂, Sistan-o Beluchestan Province, Zabol County, Zabol, 31°09′23′′ N, 61°23′57′′ E, 450 m a.s.l., 20 Apr. 2016, swept from Tamarix aphylla, H.A. Derafshan  leg. ( HMIM).



BODY LENGTH. 3.3–3.7 mm (excluding antennae).

HEAD. Face dark, silver-gray pollinose. Scape dark, pedicel brown with a pair of short upper bristles and one short lower bristle; flagellum yellow, short tapering and gray pollinose (LF:WF=2–2.2); arista dark, flattened, with thickened base. Eyes converging but not meeting and separated by less than diameter of frontal facets ( Fig. 2BView Fig). Frons dark, silver-gray pollinose; vertex dark, lacking pollinosity; 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 3–5 postpronotal setae along upper margin. Prescutum and scutum gray pollinose, with two uniseriate dorsocentral rows of conspicuous setae and supra-alar setae. Scutellum gray pollinose, with an apical fringe of up to ten pale setae (up to 0.1 mm). Subscutellum gray pollinose.

WING. Length: 3.3–3.5 mm. LW:MWW=3–3.2. Wing almost entirely covered with microtrichia. Only small basal cells of wings, e.g., bc, basal of cell c, br, cell bm, basal of cup with somewhat reduced microtrichia. Pterostigma brown and complete (LS:LTC =1.0, LTC:LFC =1.1). M 1 gently undulating.

HALTER. Length: 0.4 mm. Base dark, stem narrowly white and knob paler than base, somewhat gray pollinose.

LEGS. Coxae dark but yellow on apical margin, gray pollinose. Mid coxa with three brown anterior bristles. Trochanters light brown, partly gray pollinose. Femora dark, distinctly light brown at apex, gray pollinose. All femora bearing two rows of dark, smaller, peg-like anteroventral spines on apical one third. Tibiae light brown, distinctly dark on apical half, gray pollinose with three rows of brown setae on anterior and posterior sides, without apical spines. Hind tibia with a wrinkled indentation midanteriorly. Tarsi light brown and paler than apical half of tibiae, brown pollinose, with some black setae dorsally. Distitarsi brown. Pulvilli shorter than distitarsi.

ABDOMEN. Ground colour dark. Tergite 1 with four to five brown lateral bristles. Tergites 1–5 with brown setae. Tergites 1–2 gray pollinose laterally and dorsally, and tergites 3–5 gray pollinose laterally extending onto dorsal surface along posterior margin. Tergite 5 asymmetrical. LT35:WT5= 1.4, WT5:LT5 =2.1 and T5R:T5L=1.1. Syntergosternite 8 dark, gray pollinose, without dorsal depression on side of left surstylus. LT35:WS8 =2.2. Viewed laterally, syntergosternite 8 higher than long (LS8:HS8= 0.6). Viewed caudally, membranous area about one third of the width of syntergosternite 8, vertically directed, broader in upper half.

GENITALIA. Genital capsule in dorsal view: epandrium dark but brownish near surstyli and tergite 5, gray pollinose and longer than wide (MLE:MWE= 1.5). Surstyli paler than epandrium, gray pollinose and symmetrical ( Fig. 3EView Fig). Both with a broad and rectangular base and a pair of finger-like projections at apices which are bent towards each other by 45° ( Fig. 3EView Fig). Genital capsule in ventral view: gonopods rather large and almost symmetrical ( Fig. 3AView Fig); phallus trifid, narrow, with long and straight ejaculatory ducts ( Fig. 3BView Fig); phallic guide of medium length, rather broad, on either side with eight downwards directed long spines at its apex ( Fig. 3AView Fig). Genital capsule in lateral view: epandrium without projecting lobe on either side. Both surstyli distinctly convex and broad in basal two thirds, distally narrowed to form a pair of finger-like processes which are bent towards each other ( Fig. 3View Fig F–G). Phallic guide broad, gently bent towards surstyli ( Fig. 3CView Fig). Ejaculatory apodeme funnel-shaped ( Fig. 3DView Fig).






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