Rhamphomyia (Amydroneura) stojanovae Bartak

Kanavalova, Liliana, Kubik, Stepan & Bartak, Miroslav, 2018, Empidinae (Diptera, Empididae) from Bulgaria with new records and descriptions of three new species, ZooKeys 785, pp. 145-161 : 145

Rhamphomyia (Amydroneura) stojanovae Bartak sp. n. Figure 5

Type material.

HOLOTYPE ♂, Bulgaria, 5 km W of Smolyan, clearing in wood, 1260 m, 41.569N, 24.632E, Barták, Kubík, 25.vi.2016 (CULSP). PARATYPES: 32♂, 9♀, same data as holotype (CULSP).

Diagnosis.

Black species of the subgenus Amydroneura with abdomen generally shiny, black setose and with long bow-shaped phallus.

Etymology: The species epithet, stojanovae, is a Latin genitive patronym to honour Dr. Anelia Stojanova for her help with organizing our expeditions to Bulgaria.

Description.

Male head black, black setose, narrowly dichoptic. Frons shiny, approx. 0.04 mm wide in middle, slightly widening dorsally, with 4-5 pairs of setae approx. as long as frons is broad. All eye facets approximately of the same size. Ocellar setae black, approx. 0.15 mm long, ocellar triangle microtrichose. Occiput subshiny, only finely microtrichose, with short black setae dorsally and somewhat longer ventrally. Face slightly broader than frons, shiny but somewhat rugose, without setae. Clypeus shiny on anterior half and microtrichose posteriorly, gena very narrow. Palpus black, short, with 5-6 setae approx. 0.10 mm long. Labrum blackish brown, shiny, slightly shorter than head height. Antenna black, both basal segments short setose; length of antennal segments (scape: pedicel: postpedicel: stylus) = 0.04-0.05 mm: 0.06-0.07 mm: 0.24-0.29 mm: 0.06-0.07 mm.

Thorax black, mesoscutum subshiny, sparsely microtrichose, more apparent in lateral view, all pleural parts grey microtrichose. All thoracic setae black. Chaetotaxy: antepronotum with several short setae, proepisternum with 1-3 setae, prosternum bare; acrostichals biserial, short (0.05 mm), shorter than distance between rows of acrostichals and dorsocentrals; dorsocentrals equally short, multiserial, spreading out laterally, ending in one long prescutellar pair; posthumeral (presutural supraalar) not differentiated from numerous similar thin setae, intrahumeral (presutural intraalar) present in rather posterior position; postpronotum with 1-2 long, strong setae and several shorter additional setae; notopleuron with 1 long, strong seta accompanied usually with another 1-2 shorter setae and additional smaller and finer setulae; supraalar and prealar regions with several setae similar to those before suture; one long postalar; two pairs of long scutellars; laterotergite black setose. Legs: coxae concolorous with pleura; legs brownish black, sparsely microtrichose, black setose. Fore femur with rows of antero- and posteroventral fine setae slightly shorter than femur depth. Fore tibia and tarsus short setose, posterodorsal fine setae slightly elongated, approx. as long as tibia depth. Mid femur with anteroventral row of setae approx. 2/3 as long as femur depth, posteroventrals irregular and short, somewhat longer apically. Mid tibia with short and somewhat stronger setae ventrally, posterodorsally with two setae on basal third almost 3X longer than tibia depth, posterodorsal setosity fine, elongated and almost curled apically, longer than tibia depth, similar setosity also present on mid tarsus. Hind femur rather densely covered with fine setae approx. as long as femur depth, ventral setae slightly shorter and more regularly arranged in row. Hind tibia with ventral ciliation very short, posterodorsally with elongated, fine and almost curled setosity similar to those on mid tibia. Tarsi of all legs with similar setosity as on corresponding tibiae. Seta in comb at tip of hind tibia very short, not longer than setae forming comb. Wings clear, slightly iridescent, veins not pigmented, only part of C vein from R1 to its end and apical part of vein R4+5 somewhat darkened, axillary angle very obtuse; costal seta present, black and long. Measurements: M2/d ratio = 0.7-0.9, CuA1 ratio = 1.7-2.1, lw:ww ratio = 2.4-2.8. Halter brownish black, calypter brown with dark fringes. Abdomen black, tergites 2-7 and sternites 1-4 shiny, dorsal parts of tergites finely microtrichose. Lateral marginal setae on tergites 2-6 almost as long as segments, discal setae almost equally long. Genitalia (Figure 5): hypandrium strongly bowed, setose; epandrium subovate, moderately setose; cercus narrow and pointed apically; phallus long and very thin. Length: body 2.0-2.3 mm (this species has abdomen at tip bowed ventrally, so actually it is slightly larger), wing 1.9-2.0 mm.

Female. Dichoptic, all facets equal in size, frons approx. 0.10 mm broad with 5-6 short black setae on each side. Face broader than frons, shiny anteriorly. Labrum slightly longer than head height. Fore femur with 2 ventral rows of setae at most half as long as femur depth. Fore tibia with dorsal setae scarcely as long as tibia depth. Mid femur short setose, antero- and posteroventrals approx. third as long as femur depth, only somewhat longer preapically.

Mid tibia with submedian posterodorsal seta twice longer than tibia depth and another shorter posterodorsal seta subbasally. Hind femur short setose, ventral setae in middle less than half as long as femur depth. Hind tibia with 2-4 posterodorsal setae slightly longer than tibia depth, otherwise short setose. Tarsi of all legs short setose including basitarsi. Abdomen with tergites 2-6 and sternites 1-5 shiny, tergite 6 subshiny, remaining parts microtrichose. All setae black and very short.

Remarks.

Rhamphomyia (Amydroneura) stojanovae sp. n. is most closely allied to R. claripennis Oldenberg (RC) and leads to this species in the key by Barták (2006a). However, the male differs in long setulae on basitarsi (short in RC) and different genitalia (with apically broadened cercus and much shorter phallus in RC - see figure 14e by Barták 1982). Distinguishing females is much more difficult. The female leads in the key by Barták (2006a) to R. claripennis except tergite 7, which is microtrichose. We found only three characters allowing to distinguish both species: R. stojanovae sp. n. has narrower frons (length: width ratio approx. 2) but broader in RC (approx. 1.6), sternite 1 is shiny in RS but microtrichose in RC, and tergite 7 is shiny in RC but microtrichose in RS. Rhamphomyia bipila Strobl is another species with which the above described species must be compared. This species, described and still known only from Spain, differs in male, besides many characters (different setosity of legs, longer stylus, narrower frons), by presence of long preapical setae on fore basitarsi and in female by narrower frons (2.5 × longer than wide) as well as slightly flattened setae on mid and hind basitarsi.

Faunistic records

Empis (Euempis) calcarata Bezzi, 1899. 1♀, Rhodopes Mountains, Pamporovo env., meadow, 1600 m, 41.39N, 24.44E, Barták, Kubík, 22.-24.vi.2016; 1♀, 27 km N of Smolyan, on flowers, nr.river, 770 m, 41.82N, 24.68E, Barták, Kubík, 19.vi.2016; 6♂, 2 km NE of Hristo Danovo, SW, forest path, 1160 m, 42.73N, 24.62E, Barták, Kubík, 15.vi.2017. Remarks: species known from southern parts of the West Palaearctic (Italy, Turkey, Russia - Krasnodarskiy Terr.). These are the first records from Bulgaria.

Empis (Leptempis) discolor Loew, 1856. 7♂, 10♀, Pirin Mountains, 6 km SE of Bansko, 1300-1600 m, 41.78N, 23.48E, forest Barták, Kubík, 1.vii.2016; 1♂, Rhodopes Mountains, Yundola, 1300 m, pasture, 42.06N, 23.85E, Barták, Kubík, 30.vi.2016. Remarks: temperate and south European species. These are the first records from Bulgaria.

Empis (Planempis) frauscheri Linnaeus, 1758. 4♂, 1♀, 9km NEE of Dospat, meadow nr. wood, 1170 m, 41.67N, 24.26E, Barták & Kubík, 23.vi.2016. Remarks: species known only from Romania and Austria. These are the first records from Bulgaria.

Empis (Xanthempis) semicinerea Loew, 1867. 1♂, 1♀, 13 km SW of Troyan, wood+meadow, 1350 m, 42.78N, 24.62E, Barták, Kubík 15.-22.vi.2017; 1♂, 1♀, Pirin Mountains, Bezbog hut, 2200 m, alpine meadow, 41.73N, 23.52E, Barták, Kubík, 28.vi.2016; 1♀, Shipka pass, edge of fagetum, SW, 1240 m, 42.74N, 25.33E, Barták, Kubík 21.vi.2017. Remarks: Central European species.

Empis (Xanthempis) stercorea Linnaeus, 1761. 1♂, Rhodopes Mountains, Pamporovo env., meadow, 1600 m, 41.65N, 24.73E, Barták, Kubík, 22.-24.vi.2016. Remarks: Palaearctic species. This is the first record from Bulgaria.

Hilara albitarsis von Roser, 1840. 1♂, Rhodopes Mountains, 25 km SSW of Plovdiv, 1590 m, meadow, 41.93N, 24.67E, Barták, Kubík, 20.vi.2016; 2♂, 1♀, Rhodopes Mountains, Pamporovo env., meadow, 1600 m, 41.65N, 24.73E, Barták, Kubík, 22.-24.vi.2016. Remarks: a European species. These are the first records from Bulgaria.

Hilara albiventris von Roser, 1840. 3♂, Gorno Sahrane, pasture nr.river, sw, 480 m, 42.64N, 25.21E, Barták, Kubík, 18.vi.2017; 1♀, 3 km N of Kalofer, meadow nr.river, sw, 720 m, 42.63N, 24.97E, Barták, Kubík, 16.-26.vi.2017. Remarks: recorded from several European countries ranging from Britain to Romania. These are the first records from Bulgaria.

Hilara anglodanica Lundbeck, 1913. 5♂, 3♀, Koprinka lake, wood, 400 m, 42.62N, 25.28E, Barták, Kubík, 21.vi.2017; 2♂, 3 km N of Kalofer, meadow nr. river, sw, 720 m, 42.63N, 24.97E, Barták, Kubík, 16.-26.vi.2017. Remarks: known from several European countries ranging from Britain to Krasnodarskiy Territory of Russia. These are the first records from Bulgaria.

Hilara coracina Oldenberg, 1916. 1♀, 2 km NE of Hristo Danovo, forest path, 1160 m, 42.73N, 24.62E, Barták, Kubík, 15.vi.2017. Remarks: species distributed in temperate and North Europe. This is the first record from Bulgaria.

Hilara discalis Chvála, 1997. 1♀, 3 km N of Kalofer, meadow nr. river, sw, 720 m, 42.63N, 24.97E, Barták, Kubík, 16.-26.vi.2017; 1♂, Gorno Sahrane, pasture nr. river, sw, 480 m, 42.64N, 25.21E, Barták, Kubík, 18.vi.2017; 1♂, Pirin Mountains, 6 km SE of Bansko, forest, 1300-1600 m, 41.78N, 23.48E, Barták, Kubík, 1.vii.2016. Remarks: a European species. These are the first records from Bulgaria.

Hilara femorella Zetterstedt, 1842. 3♂, 2♀, Pirin Mountains, Vikhren hut, 2000 m, alpine meadow, 41.75N, 23.41E, Barták, Kubík, 27.vi.2016. Remarks: known from Europe except southernmost parts. These are the first records from Bulgaria.

Hilara fuscipes (Fabricius, 1794). 33♂, 13♀, 3 km N of Kalofer, meadow nr. river, sw, 720 m, 42.63N, 24.97E, Barták, Kubík, 16. × 26.vi.2017. Remarks: widely distributed Palaearctic species. These are the first records from Bulgaria.

Hilara galactoptera Strobl, 1910. 1♀, Rhodopes Mountains, 25 km SSW of Plovdiv, 1590 m, meadow, 41.93N, 24.67E, Barták, Kubík, 20.vi.2016. Remarks: species known from temperate Europe. This is the first record from Bulgaria.

Hilara lasiopa Strobl, 1892. 2♂, Pirin Mountains, 6 km SE of Bansko, forest, 1300-1600 m, 41.78N, 23.48E, Barták, Kubík, 1.vii.2016. Remarks: distributed in several countries in West part of temperate Europe. These are the first records from Bulgaria.

Hilara longivittata Zetterstedt, 1842. 13♂, 2♀, Troyan pass, nr. brook, sw, 1400 m, 42.77N, 24.61E, Barták, Kubík, 22.-24.vi.2017; 3♂, 13 km SW of Troyan, wood+meadow, 1350 m, 42.78N, 24.62E, Barták, Kubík 15. × 22.vi.2017; 4♂, Shipka pass, edge of Fagetum, sw, 1240 m, 42.74N, 25.33E, Barták, Kubík, 21.vi.2017. Remarks: Palaearctic species, ranging from Ireland to Far East of Russia, absent from southern parts. These are the first records from Bulgaria.

Hilara lurida ( Fallén, 1816). 3♂, 3 km N of Kalofer, meadow nr. river, sw, 720 m, 42.63N, 24.97E, Barták, Kubík, 16.-26.vi.2017. Remarks: known from nearly all Europe except southernmost parts. These are the first records from Bulgaria.

Hilara nigrocincta de Meijere, 1935. 4♂, Gorno Sahrane, pasture nr. river, sw, 480 m, 42.64N, 25.21E, Barták, Kubík, 18.vi.2017. Remarks: a species of temperate and warm Europe, from the Netherlands, south through central parts of Europe including the Alpine region to the Mediterranean. These are the first records from Bulgaria.

Hilara nitidorella Chvála, 1997. 1♂, Troyan pass, nr. brook, sw, 1400 m, 42.77N, 24.61E, Barták, Kubík, 22.-24.vi.2017; 8♂, 1♀, Pirin Mountains, 6 km SE of Bansko, forest, 1300-1600 m, 41.78N, 23.48E, Barták, Kubík, 1.vii.2016. Remarks: distributed from British Isles to Slovenia, northwards to Leningradskaya Province of Russia. These are the first records from Bulgaria.

Hilara quadriseta Collin, 1927. 5♂, 4♀, Rhodopes Mountains, Yundola, 1300 m, pasture, 42.06N, 23.85E, Barták, Kubík, 30.vi.2016; 5♂, Pirin Mountains, 6 km SE of Bansko, forest, 1300-1600 m, 41.78N, 23.48E, Barták, Kubík, 1.vii.2016. Remarks: species known from only several countries of temperate Europe ranging from British Isles to Slovakia. These are the first records from Bulgaria.

Hilara splendida Straka, 1976. 8♂, 3♀, 3 km N of Kalofer, meadow nr. river, sw, 720 m, 42.63N, 24.97E, Barták, Kubík, 16.-26.vi.2017; Rhodopes Mountains, Pamporovo env., meadow, 1600 m, 41.65N, 24.73E, Barták, Kubík, 22.-24.vi.2016. Remarks: known from several European countries ranging from Germany and Switzerland to Romania and the Caucasus (also Turkey - our unpublished data). These are the first records from Bulgaria.

Hilara sturmii Wiedemann, 1822. 1♂, 3 km N of Kalofer, meadow nr. river, pt, 730 m, 42.63N, 24.97E, Barták, Kubík, 20.-27.vi.2017. Remarks: widely distributed in Europe from the British Isles and southern parts of Fennoscandia to the Mediterranean, east to Romania. These are the first records from Bulgaria.

Rhamphomyia claripennis Oldenberg, 1922. 1♂, 27 km N of Smolyan, on flowers, nr.river, 770 m, 41.82N, 24.68E, Barták, Kubík, 19.vi.2016; 1♂, 5 km W of Smolyan, clearing in wood, 1260 m, 41.56N, 24.63E, Barták, Kubík, 25.vi.2016; 1♂, Rhodopes Mountains, 25 km SSW of Plovdiv, 1590 m, meadow, 41.93N, 24.67E, Barták, Kubík, 20.vi.2016. Remarks: previously known from only several countries ranging from Germany to Italy. These are the first records from Bulgaria.

Rhamphomyia crinita Becker, 1887. 10♂, 3♀, Pirin Mountains, Vikhren hut, 2000 m, alpine meadow, 41.75N, 23.41E, Barták, Kubík, 27.vi.2016. Remarks: species distributed in mountains of Central Europe. Possibly complex of siblings. These are the first records from Bulgaria.

Rhamphomyia dudai Oldenberg, 1927. 1♂, 5 km W of Smolyan, clearing in wood, 1260 m, 41.56N, 24.63E, Barták, Kubík, 25.vi.2016. Remarks: species known from most parts of temperate and North Europe. This is the first record from Bulgaria and, contemporarily, southernmost distributional record.

Rhamphomyia magellensis Frey, 1922. 3♂, 2♀, Pirin Mountains, 6 km SE of Bansko, forest, 1300-1600 m, 41.78N, 23.48E, Barták, Kubík, 1.vii.2016. Remarks: species known from several European mountains ranging from Pyrenees to Slovakia. These are the first records from Bulgaria and, contemporarily, easternmost distributional records.

Rhamphomyia nudipes Oldenberg, 1927. 1♂, Rhodopes Mountains, 25 km SSW of Plovdiv, 1590 m, meadow, 41.93N, 24.67E, Barták, Kubík, 20.vi.2016; 1♂, Shipka pass, edge of Fagetum, sw, 1240 m, 42.74N, 25.33E, Barták, Kubík, 21.vi.2017. Remarks: reported only from Italy but we have other (unpublished) records from France, Austria and Greece. These are the first records from Bulgaria.

Rhamphomyia sphenoptera Loew, 1873. 2♂, Pirin Mountains, Vikhren hut, 2000 m, alpine meadow, 41.75N, 23.41E, Barták, Kubík, 27.vi.2016. Remarks: known with certainty from Italy, Serbia and Montenegro, and Albania. Records from Greece and Hungary need verification. These are the first records from Bulgaria.

Rhamphomyia umbripennis Meigen, 1822. 1♂, Pirin Mountains, Bezbog hut, 2200 m, alpine meadow, 41.73N, 23.52E, Barták, Kubík, 28.vi.2016. Remarks: species known from most of Europe except southernmost parts. This is the first record from Bulgaria.

Rhamphomyia umbripes Becker, 1887. 1♂, 13 km SW of Troyan, wood+meadow, 1350 m, 42.78N, 24.62E, Barták, Kubík 15.-22.vi.2017. Remarks: known only from several central European countries (Germany, Czech Republic, Slovakia, Austria, and Italy). Recently Chvála and Pont (2015) synonymised the subgenus Aclonempis Collin, 1926 (genus Rhamphomyia ) with the genus Empis but at this moment (prior to complete re-classification of the whole tribe Empidini ) this is not accepted here. This is the first record from Bulgaria.