Eudorylas nasicus Motamedinia & Skevington, 2020

Motamedinia, Behnam, Skevington, Jeffrey Hunter & Kelso, Scott, 2020, Revision of Eudorylas Aczel, 1940 (Diptera, Pipunculidae) in the Middle East, with the description of four new species, Biodiversity Data Journal 8, pp. 53609-53609 : 53609

Eudorylas nasicus Motamedinia & Skevington, 2020 sp. n.

Materials

Type status: Holotype. Occurrence: catalogNumber: JSS50793 ; recordedBy: A. Freidberg; individualCount: 1; sex: Male; associatedSequences: GB: MN549667; Location: country: Israel; locality: Zomet Ha'Amaqim (Jalame) ; decimalLatitude: 32.716; decimalLongitude: 35.10; Event: eventDate: 1993-05-18 /22; Record Level: institutionCode: TAU

Description

Male (Fig. 16 A-C). Body length (excluding antennae): 3.9 mm. Head. Scape dark with 1-2 dark upper bristles, pedicel brown with two long and two short upper bristles and two long lower bristles, flagellum tapering and brown pruinose (LF:WF = 3.0); arista with thickened base. Eyes meeting for a distance of 15-17 facets. Frons dark brown pruinose with a weak median shining tubercle. Vertex black, bearing an elevated ocellar triangle. Occiput dark with scattered dark bristles. Thorax. Postpronotal lobe light brown, grey pruinose and with 2-4 postpronotal light brown bristles along upper margin (up to 0.05 mm). Prescutum and scutum black, predominantly brown pruinose, with two uniseriate dorsocentral rows of dark bristles and longer supra-alar bristles. Scutellum black, brown pruinose with 14 thin short setae along posterior margin (up to 0.05 mm). Subscutellum and pleura dark brown, grey pruinose. Wing. Length: 4.1 mm. LW:MWW = 4.0. Wing almost entirely covered with microtrichia. Pterostigma dark-brown and complete. LS:LTC = 1.0. LTC:LFC = 1.1. Cross-vein r-m reaches dm shortly after one-third of the cell’s length. M1 moderately undulating in middle. Halter length: 0.5 mm, base and knob dark brown, stem narrowly light brown. Legs. Coxae dark brown, grey pruinose. Fore and hind coxae with four to five short brown setae and mid coxa with two long dark setae and three brown setae on inner apical corner. Trochanters somewhat light brown partly grey pruinose. Fore femur dark brown with pale apices, grey pruinose bearing two rows of dark anteroventral small spines in apical half. Tibiae dark brown, grey pruinose, with two rows of short setae on anterior side and three rows on posterior. Tarsi light brown with scattered dark setae at anterior margin. Pulvilli yellow. Claws light brown with black tips. Abdomen. Ground colour dark brown, tergite 1 brown pruinose, with three to four long dark (up to 0.16 mm) and five to six short (up to 0.08 mm) brown lateral bristles. Tergites 2-5 brown pruinose with scattered brown setae. Sternites brown with some scattered dark setae. Membranous area ovate. Genitalia. Genital capsule in dorsal view: epandrium brown, grey pruinose. Epandrium longer than wide (MLE:MWE = 1.2) (Fig. 17 A). Both surstyli rather rectangular-shaped at base. Left surstylus triangular-shaped in apical one third. Right surstylus broader than left one, with a small projection at outer margin in middle and with a longer finger-like projection at inner margin shortly before its apex, pointing towards left surstylus (Fig. 17 A). Genital capsule in ventral view: subepandrial sclerite wide (Fig. 17 B). Gonopods unequal, right gonopod higher than the left one. Phallus trifid; phallic guide short, broad and straight, with a long lateral projection towards right gonopod horizontally and bent upwards at its apex (Fig. 17 B). Genital capsule in lateral view: phallic guide straight with a small dorsolateral projection before its apex (Fig. 17 D). Left surstylus rounded with a finger-like projection apically and with a ventral margin distinctly concave in apical one third (Fig. 17 D). Right surstylus broadened at base with two finger-like projection apically, the longer one is situated ventrally before the apex and the shorter one arising from the apex (Fig. 17 E). Ejaculatory apodeme spade-shaped (Fig. 17 C).

Diagnosis

This species can be recognised by asymmetrical surstyli in dorsal view, both surstyli rather rectangular-shaped at base, left surstylus triangular-shaped in apical one third, right surstylus with an inner finger-like projection shortly before its apex, pointing towards left surstylus in dorsal view and with small projection at outer margin in middle (Fig. 17 A); gonopods unequal, right slightly higher than left one in ventral view (Fig. 17 B); phallus trifid; phallic guide short and straight, with a long lateral projection towards right gonopod horizontally and bent upwards at its apex in ventral view (Fig. 17 B). Phallic guide with a small but distinct dorsal projection shortly before its apex in lateral view (Fig. 17 D, E).

Etymology

The specific epithet is derived from the Latin nasicus (= nose), referring to the long projection of the right surstylus in dorsal view.

Distribution

Israel (Fig. 6 ).

Taxon discussion

Male E. nasicus sp. n. can be identified by the shape of surstyli and phallic guide, which place it in close relation to E. unicolor , E. wahisi and E. pannonicus. The right surstylus of all four of these species shows an inner finger-like projection in dorsal view and the phallic guide has a distinct projection in ventral view. Compared to E. unicolor , the right surstylus of E. nasicus sp. n. has a distinct small projection at the outer margin in the middle in dorsal view (Fig. 17 A), whereas in E. unicolor , it does not have a distinct small projection at the outer margin in the middle (see Kehlmaier 2005a: Fig. 67j). Meanwhile, in E. nasicus sp. n., the left surstylus in lateral view is rounded (circle-shaped), with a finger-like projection apically and with a ventral margin distinctly concave in the apical one third (Fig. 17 D), whereas in E. unicolor , the left surstylus is not rounded and has the ventral margin distinctly concave from the base to the apex. In E. wahisi , the finger-like projection of right surstylus is wider and the lateral projection of the phallic guide is long (see Kehlmaier 2005a: Fig. 68a, j). In E. pannonicus , the finger-like projection of right surstylus is longer and the right gonopod has two distinct projections (Fig. 18 B).

Notes

DNA barcodes of Eudorylas nasicus sp. n. and E. pannonicus are similar. See the notes under E. pannonicus .

Figures

Figure 6. Eudorylas species distribution in the Middle East.

Figure 16. Male of Eudorylas nasicus Motamedinia & Skevington sp. n. (JSS 50793) (A) habitus in dorsal view, scale bar = 1 mm; (B) habitus in lateral view, scale bar = 1 mm; (C) compound eyes in lateral view, scale bar = 500 µm.

Figure 17. Male genitalia of Eudorylas nasicus sp. n. (JSS 50793) (A) in dorsal view; (B) in ventral view; (C) ejaculatory apodeme; (D, E) in lateral view.

Figure 18. Male genitalia of Eudorylas pannonicus (JSS 52207) (A) in dorsal view; (B) in ventral view; (C) phallus & phallic guide in ventrolateral view; (D) ejaculatory apodeme; (E, F) in lateral view.