Bicellaria kocoureki, Barták, Miroslav & Kubík, Štěpán, 2013

Barták, Miroslav & Kubík, Štěpán, 2013, Species of Bicellaria Macquart (Diptera: Hybotidae) of Europe, with descriptions of four new species, Zootaxa 3647 (2), pp. 251-278 : 261-262

Bicellaria kocoureki sp. nov.

( Figs 17–18 )

Type material. HOLOTYPE 3: Bulgaria, Pirin, Banderica, 1800 m, 7.vii.1982, F. Kocourek (CULSP). PARATYPES: Bulgaria, 53, 7Ƥ, same data as holotype (CULSP); 13, 2Ƥ, Pirin, Begovica, 1760 m, 17.1 km NW from Sandanski, 41°40'09''N, 23°25'33''E, 10.viii.2005, J. Fechtner (CULSP).

Diagnosis. Entirely black setose species; third antennal segment without dorsal setae, broadened part of third segment very short in comparison to its narrow part and stylus; halter yellow in both sexes; male hypandrium with short and long setose processes; female tergites 5–8 almost entirely lustrous.

Description. Male. Head black, brownish grey microtrichose, black setose (including lower occiput). Eyes meeting on frons, facets on dorsal half much larger than on ventral half, about 10–12 facets in line of contiguity of eyes. One pair of long black ocellar setae. Occiput rather sparsely setose. Face nearly parallel-sided and about 0.05 mm broad, clypeus slightly paler grey microtrichose. Palpus short, brown, with 2 setae. Labrum brown, lustrous. Antenna black, second segment short setose (longest ventral setae about 0.08 mm); third segment without dorsal setae; ratio of broad part of segment 3: narrow part of segment 3: stylus (in 0.01 mm scale) = 9–12: 5–8: 17–25. Thorax black to brownish black, slightly subshining, prescutellar area (broad and reaching hind acrostichals) and scutellum lighter than disc of mesoscutum. All thoracic setae black including fringes on squama. Chaetotaxy: acrostichals biserial and long even in presutural area (about 0.15 mm in front but longer posteriorly); dorsocentrals (with exception of first 1–2 pairs) slightly longer than corresponding acrostichals; about 3–8 setae in posthumeral and intrahumeral areas; 1 longer and 2–3 slightly shorter postpronotals; notopleura with 3–6 unequally long setae in one irregular row; 1 supraalar and 1–2 setae in prealar area; 1 long postalar; 2–3 pairs of scutellars. Legs including coxae black, microtrichose (only trochanters partly lustrous) and black setose. Fore femur with row of short anteroventrals and row of slightly longer posteroventrals (half as long as depth of femur). Fore tibia with 1–3 longest posterodorsals (in basal half of tibia) 1.5X as long as depth of tibia, posteroventrals slightly longer than depth of tibia. Mid femur with sparse row of anteroventrals half as long as depth of femur, with posteroventrals subequally as long as depth of femur. Mid tibia with ventral setae about as long as depth of tibia, with 1–2 pairs of dorsal setae up to 0.20 mm long (longest about 4X as long as diameter of tibia). Hind femur with 14–15 anterodorsal and 14–15 anteroventral setae slightly longer than depth of femur, posteroventrals shorter than corresponding anteroventrals. Hind tibia slightly swollen in apical half (about 0.11 mm at broadest point), subequally broad or slightly narrower than hind femur (about 0.12 mm at broadest point), ventral setae about as long as depth of tibia, 2–3 pairs of dorsal setae up to 3X as long (0.20 mm). Tarsi of all legs thin and short setose. Wing slightly brownish infuscated, stigma light brown and narrow (0.04–0.05 mm), about 2.2X as long as distance between tips of veins R1 and R2+3. Squama brown with black fringes, halter yellow. Abdomen black, dull brownish black microtrichose in dorsal view and grey in lateral view and posteriorly, rather short and entirely black setose. Genitalia ( Figs 17–18 ) unusual in view of European species of Bicellaria : hypandrium long, processes narrow and short, broadly U-shaped, covered with several rather long setae; postgonites small and narrow, both phallic hooks subequal in length, phallus with two smaller additional hooks derived probably from ejaculatory apodeme (appearing as additional smaller hook in lateral view), ventral apodeme slightly broadened laterally. Female. Similar to male. Last three abdominal segments (6–8) almost entirely lustrous. Length: body 2.5–3.5 mm, wing 2.3–2.9 mm.

Etymology. The species is named after the collector of the type series, Dr. František Kocourek (Prague).

Distribution. Bulgaria.

Remark. The species described above can be easily identified according to the key. It is rather isolated in position among European Bicellaria with possible affinity to the B. uvens complex of species.

Figures

FIGURES 17 – 24. Hypandrium (ventral view) and phallus with postgonites (lateral view). 17 – 18. Bicellaria kocoureki sp. nov. 19 – 20. Bicellaria longisetosa Chvála. 21 – 22. Bicellaria mera Collin. 23 – 24. Bicellaria nigra (Meigen). Scale bars = 0.10 mm.