Empis (Lissempis) guilanensis Kazerani & Shamshev

Kazerani, Farzaneh, Khaghaninia, Samad, Talebi, Ali Asghar & Shamshev, Igor, 2014, New data on Empis Linnaeus (Diptera: Empididae) from Iran, with description of a new species of the subgenus Lissempis Bezzi, Zootaxa 3884 (2), pp. 185-193 : 187-190

Empis (Lissempis) guilanensis Kazerani & Shamshev , sp. nov.

( Figs 1–7 )

Type material. HOLOTYPE, ♂ " IRAN, Guilan province, Rudsar, Orkom, N 36˚ 45.739', E 0 50 18.198 ', 1201 m, 31.V.2010, M. Khayrandish" ( TMUC). PARATYPE: ♂, same data as holotype ( ICHMM).

Recognition. Mid-sized species with black, pale setose thorax and partly yellow abdomen ( Fig. 1 ); postpronotal lobe, scutum and scutellum shining; scape of antenna elongate, nearly 3X longer than wide; postpedicel about 6X longer than wide ( Fig. 6 ); legs largely yellow, covered with unmodified setae, hind tibia thickened towards apex ( Fig. 4 ), hind basitarsus slightly swollen ( Fig. 4 ).

Description. Male ( Figs 1–7 ). Body length 5–5.3 mm (in holotype 5.3); wing length 3.8–4.2 mm (in holotype 4.2). Head largely black in ground-colour; vertex, ocellar tubercle, frons and face subshining, faintly greyish pollinose, occiput light brown. Eyes dichoptic. Frons narrow, above antennae narrower than anterior ocellus; with several thin yellow setae. Face very narrow, below antennae nearly as broad as frons. Ocellar tubercle with 2 long, thin brownish yellow and several minute setae. Occiput covered with numerous thin, pale setae. Antenna dark brown; scape with scattered short dark setae, nearly 3X longer than wide, about 2.5X longer than pedicel; pedicel with short dark setae; postpedicel very long, 5.8–6.0X longer than wide near base, with straight margins; stylus short ( Fig. 5 ). Proboscis yellow, 2 times longer than head height; labrum yellow, about 1.5 times longer than head height; palpus yellowish brown, with scattered yellow setae.

Thorax black in ground-colour, only postalar callus yellow, with pale to yellow setae; postpronotal lobe, scutum (except notopleuron) and scutellum shining; remaining prothoracic sclerites and entire mesopleuron faintly pollinose. Prosternum and proepisternum bare. Antepronotum and postpronotal lobe with several short, thin setae. Mesonotum with 2 notopleurals (anterior seta distinctly longer, as long as apical scutellars), 2 short postalar, 6 scutellars (apical and median pairs long, lateral pair short); additionally, notopleuron with several hair-like setae; acrostichals uniserial, short, rather scattered, also present on prescutellar depression; dorsocentrals uniserial, nearly as long as acrostichals, prescutellar pair long (nearly as long as lateral scutellar bristles). Laterotergite with numerous long pale setae.

Legs with coxae, fore and mid femora and tibiae entirely yellow; hind femur brown on about apical 1/4, otherwise yellow ( Fig 4 ); hind tibia brownish yellow to yellow near base, otherwise brownish ( Fig. 4 ); tarsi brown, except yellow basal 2/3 of fore and mid basitarsus ( Figs 2–4 ). Coxae and trochanters with ordinary pale setae. Fore femur slender, with rows of pale (closer to base) moderately long setae ( Fig. 2 ). Fore tibia lacking strong setae, denser pubescent closer to apex, with 2 short, black, spine-like subapical setae ventrally ( Fig. 2 ). Fore tarsus unmodified; clothed in short, ordinary setae ( Fig. 2 ). Mid femur slightly narrower than fore femur; with short, thin ventral pale and brown setae and 1 subapical back seta ( Fig. 3 ). Mid tibia with 2 black, spine-like subapical setae anteriorly, otherwise clothed in short ordinary setae ( Fig. 3 ). Mid tarsomeres unmodified. Hind femur narrowed on basal part; with dense silvery white pubescent ventrally, with 1 strong, black anteroventral subapical seta and similar subapical seta anteriorly ( Fig. 3 ). Hind tibia evenly thickened towards apex; pubescent ventrally, with 1 black dorsal bristle near base and some scattered, short setae closer to apex dorsally ( Fig. 4 ). Hind basitarsus slightly uniformly thickened but narrower than hind tibia at apex; covered with unmodified setae ( Fig. 4 ).

Wing hyaline, anal lobe weakly developed, anal angle obtuse; 1 rather short, thin costal seta; stigma distinct, brownish yellow. Veins R5 and M1 slightly divergent near wing margin; radial fork rather broad; vein CuA+CuP incomplete; discal median cell elongate apically. Calypter yellow, with pale setae. Halter yellow ( Fig. 1 ).

Abdomen largely brownish to yellowish brown, tergites 1–4 yellowish laterally and narrowly along posterior margin, sternites 1–4 entirely pale yellow ( Fig. 1 ); covered with scattered, short, pale setae; pregenital segments unmodified. Terminalia ( Figs 6 , 7 ) moderately large. Cercus brown, covered with short black setae; viewed laterally subglobular on basal part, with two apical projections, upper projection short and digitiform, lower projection large and bifurcate apically. Epandrial lamella dark brown; with long, pale setae along lower margin; with deep cleft apically. Hypandrium yellowish brown, bare, concave apically. Phallus yellow, rather thin, evenly bowed, with two loops on apical part.

Female. Unknown.

Etymology. The name of the new species refers to Guilan Province of Iran where the type material was collected.

Distribution. Iran (Guilan).

Remarks. Empis guilanensis sp. nov. is closely related to E. azishtauensis Shamshev et Kustov, 2013 described recently from the North Caucasus ( Russia: Republic of Adygea, Krasnodar Territory) ( Shamshev & Kustov 2013). However, the new species differs from E. azishtauensis by colour of fore and mid tibiae which are entirely yellow (with brown apex in E. azishtauensis ); by the structure of the hind basitarsus which is slightly uniformly thickened (strongly swollen on basal half in E. azishtauensis ); by ordinary setation of abdominal tergites (with spinule-like setae in E. azishtauensis ) and by structure of the male terminalia.

Figures

FIGURE 7. Empis (Lissempis) guilanensis sp. nov., male genitalia, lateral view. Abbreviations: cerc—cercus; epandepandrium; hypd— hypandrium; phal—phallus (scale: 0.5 mm).

FIGURES 1 – 4. Empis (Lissempis) guilanensis sp. nov. 1. male habitus (lateral view); 2. fore leg; 3. mid leg; 4. hind leg (scale: 1 mm).

FIGURES 5 – 6. Empis (Lissempis) guilanensis sp. nov. 5. antenna; 6. male genitalia (lateral view) (scale: 0.5 mm).