Dasydorylas derafshani 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 : 4-6

Dasydorylas derafshani Motamedinia & Kehlmaier sp. nov.

urn:lsid:zoobank.org:act:CCFE0068-C682-4C17-A45B-587D2F220575

Figs 2–3

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.

Etymology

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

Holotype

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).

Paratypes

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, LT626249 ); 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).

Description

Male

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. 2B ). 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. 3E ). 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. 3E ). Genital capsule in ventral view: gonopods rather large and almost symmetrical ( Fig. 3A ); phallus trifid, narrow, with long and straight ejaculatory ducts ( Fig. 3B ); phallic guide of medium length, rather broad, on either side with eight downwards directed long spines at its apex ( Fig. 3A ). 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. 3 F–G). Phallic guide broad, gently bent towards surstyli ( Fig. 3C ). Ejaculatory apodeme funnel-shaped ( Fig. 3D ).

Female

Unknown.

Distribution

Iran.

Figures

Fig. 2. Dasydorylas derafshani Motamedinia & Kehlmaier sp. nov., ♂, paratype. A. Lateral view. B. Dorsal view. Scale bars: 1 mm.

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.