taxonID	type	description	language	source
03FF8733FFAF381AFF8A8F51FD4AFB85.taxon	description	Figures 1 A – D, 2.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAF381AFF8A8F51FD4AFB85.taxon	materials_examined	Holotype: Male, labelled in Russian letters “ Republic Altai, Ulaganskij district, Kurajskij mountain range, 2500 – 2800 m a. s. l. 50,33 ° N, 87,75 ° E, tundra 1. – 4.07.2008 leg. R. Dudko. ” The holotype is kept at ZMN.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAF381AFF8A8F51FD4AFB85.taxon	diagnosis	Diagnosis and comparison with related species: fore and mid tibia with short hairs only, without posterolateral bristles and thus similar to male P. fallax Barkalov & Nielsen, 2008. P. dudkoi sp. n. differs from fallax in body hairs all white (mainly black in fallax), thorax and hind part of frons steel blue (dark greyish in fallax), hairs on head and thorax white (black in fallax), dusting on frons whitish (grey in fallax), haltere pale orange yellow (greyish brown in fallax) and abdomen with dull, light grey bands (dull grey spots in fallax).	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAF381AFF8A8F51FD4AFB85.taxon	description	Description Male Head: Figure 1 A – B. Eye angle 110 °, frons heavily dulled by white dusting, the hairs white. Antennae black; 3 rd segment short, scarcely as long as wide. Face, genae and occiput dulled by greyish white dusting; white haired. D Thorax: Figure 1 C. Scutum, scutellum and pleurae bluish black, somewhat dulled by greyish white dusting, the hairs are white. – Wings: wing cells br and bm microtrichose, except for anterior part of br and extreme base of bm bare. Haltere pale orange yellow, calypter whitish yellow. – Legs all black, only the knees narrowly yellow. Tibia 1 – 2 without bristles, only with short whitish yellow hairs. Fore femur behind with white hairs, none of the hairs are longer than thickness of femur. Hind femur with long white hairs. Abdomen: Figure 1 D. Tergites 2 – 5 black with broad and dull, light greyish bands; the terminalia shining black. Sternites metallic bluish black with light dusting. The hairs on tergites and sternites white. Body length: (from frons till tip of abdomen) 8.5 mm. Wing length: 6.3 mm. Female: unknown. Etymology. The species is named after Dr. Roman Y. Dudko, Novosibirsk who participated in several expeditions to high mountain areas, and who collected this unknown Platycheirus. Ecology: The specimen was caught on high mountain tundra, hovering near stones (Figure 2).	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAD381AFF8A8D67FBC2F945.taxon	description	Figures 3 A – D, 4.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAD381AFF8A8D67FBC2F945.taxon	materials_examined	Holotype: Russia, ♂ labelled ” Ur. Chattukay, the outlet of river West Pshart, 3350 m Pamir, Salix, Gorodkov 26. vi. 1958 ”. Paratype, ♂ with same label information as the holotype. The holotype is kept in coll. ZI. St. Petersburg, the paratype in ZMN.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAD381AFF8A8D67FBC2F945.taxon	diagnosis	Diagnosis and comparison with related species: P. pamiricus sp. n. belongs to the albimanus - group (Vockeroth 1990) and the P. scutatus (Meigen, 1822) species complex. The male differs from all other species of the complex in sabre-like bristles on ventral side of mid tibia. The frons is wide.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAD381AFF8A8D67FBC2F945.taxon	description	Description Male Head. Figure 3 A. Eye angle 105 °. Frons black haired, dulled by grey dusting, somewhat contrasting with facial dusting. Face, genae and occiput with light grey dusting. Upper part of face with black hairs, lower part of face, genae and occiput mainly pale haired. The black, undusted median stripe occupying only 1 / 6 the width of the face. Antenna: 1 st and 2 nd segments blackish brown, 3 rd segment grey brown, reddish below at base. Arista greyish brown. Thorax. Figures 3 B – C, 4. Scutum and scutellum shining, yellow haired. Pleurae with light greyish yellow dusting, the hairs yellow white. – Wing: veins greyish brown, orange brown at base. Wing stigma pale yellowish grey. Haltere pale orange. Calypter greyish yellow, the rim light greyish brown. – Legs: fore tarsus, see Figure 3 B. Tibia 2 ventrally with strong, sabre-like yellowish bristles, dorsoposteriorly with long bristly hairs. Abdomen. Figure 3 D. Tergites 1 and 5 metallic greyish black, lightly shining. Tergites 2 – 4 dull black with blue reflections, each with a couple of light grey spots. The spots on tergite 2 are roundish and small. The dark area between the spots on tergite 3 is about 1.5 times longer than wide. The posterior margin of the spots on tergites 3 and 4 are oblique. Terminalia shining black. The lateral hairs of the tergites are white yellow. The sternites are shining black with light dusting. Body length (from frons till tip of abdomen) 8.6 mm; wing length 7.3 mm. Female: unknown. Etymology. The species name pamiricus refers to the Central Asian Pamir mountains where the species was found. Ecology: unknown. A comparison between P. pamiricus sp. n. and related species is given in Table 1.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAB381DFF8A8BDCFEECFE05.taxon	description	Figures 5 A – D	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAB381DFF8A8BDCFEECFE05.taxon	materials_examined	Holotype: Russia, ♂ “ Transbaikalia Sokhondo res. Agutsa 14.06.1991 B. P. Zacharov ”. The area is some 250 km south-east of lake Baikal. The holotype is kept in ZMN.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAB381DFF8A8BDCFEECFE05.taxon	diagnosis	Diagnosis and comparison with related species: the new species belongs to the ambiguus - group (Vockeroth 1990) and has great resemblance to P. transfugus (Zetterstedt, 1838). Both species have a shiny metallic mesonotum, tergites 2 – 4 with oblique orange spots and fore tibia shorthaired, without long setae postero-laterally. The Platycheirus transbaikalicus male differs from male P. transfugus (Figures 5 E – G) in a longer 3 rd antennal joint, a less swollen frons, eye angle about 90 º (105 – 110 º in transfugus), face narrower and lower part of face more nosy. Fore femur behind with pin like setae (soft hairs in transfugus), and tergites 2 – 3 of the abdomen narrower. The yellow spots on tergite 3 are close to front margin of tergite (less so in transfugus).	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAB381DFF8A8BDCFEECFE05.taxon	description	Description Male Head. Figure 5 A – B. Eye angle about 90 °. Ocellar triangle bluish black with white and a few black hairs. Frons, face, genae and occiput silvery white dusted. Frons black haired, face, genae and occiput white haired. Antennae: 1 st and 2 nd segments brownish black, 3 rd segment about 1.6 times longer than wide; dark brown, reddish below at extreme base. Arista brown. Thorax. Figure 5 C. Scutum, scutellum and pleurae shining metallic black, only with light greyish dusting, white haired. – Wing: veins greyish brown, on basal half light brown. Stigma yellow. Calypter light greyish yellow, the rim orange yellow. Haltere light orange yellow. – Legs: fore femur orange yellow, posterioly with a row of thin black, blunt ending setae on apical 2 / 3, white hairs towards femur base. Fore tibia orange yellow, darkened on apical 1 / 3. Tibia mainly short haired, laterally only with two short white bristly hairs after the middle of left tibia. Tarsus of fore legs greyish brown. Mid and hind femur brownish black, yellow at base and apex. Mid tibia dark yellow with a black ring near the base, hind tibia dark greyish on apical 2 / 3. Tarsi of mid and hind legs dark grey. Abdomen. Tergites 1 and 5, and terminalia shining black. Tergites 2 – 4 dull black, each with a couple of oblique orange spots, all tergites white haired. Sternites light greyish yellow, white haired. Body length (from frons till tip of abdomen) 7.4 mm, wing length 5.6 mm. Female: unknown. Etymology. The species name reflects the mountainous region to the east of Lake Baikal from where the species has been described. Ecology: unknown.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAA381EFFA888E7FEAEFE05.taxon	description	Figures 6 A – D	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAA381EFFA888E7FEAEFE05.taxon	diagnosis	Diagnosis: The Platycheirus latens female has orange spots on the abdomen and resembles P. clypeatus (Meigen, 1822), but is slightly larger and with a more longish abdomen. The female in our material is from a couple collected by the first author, see below.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFAA381EFFA888E7FEAEFE05.taxon	description	Description Female Head: Figure 6 A – B. Frons shining black with two large light grey dust spots; frons black haired. Face densely greyish dusted (except for central prominence shining black), white haired. Genae light greyish dusted, occiput densely so, the hairs are white. Antennae black. Thorax: Figure 6 C. Scutum and scutellum shining metallic black, the hairs light yellow. Humerus, notopleuron and pleurae with dense greyish dusting. – Legs: fore and mid leg orange yellow, coxa and trochanter black. Hind legs orange yellow except for femur and tibia with a broad black ring after the middle. Basitarsus at apex and the following two segments yellow, tarsus otherwise blackish. – Wings: the veins dark brown, light brown at base; stigma greyish yellow. Calypter and haltere light yellow. Abdomen: Figure 6 D. Tergite 1 black with pale dusting. Tergites 2 – 5 each with a pair of orange spots, the following tergites black. Sternites yellow, except for sternite 1 and sternites 4 – 5 broadly brown on about apical half. Body length: (from frons till tip of abdomen) 8.9 mm. Wing length: 7.8 mm Additional species	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA9381EFF8A88E7FEBCFD65.taxon	materials_examined	Tuva, Teli 10 June 1963 1 ♂, leg. N. Violovitsh and Russia, Chitinskaya Region, left bank of Onon river, near bridge, 8 km WNW from Nizhnij Tsasuchej settlement, southern slope 3 June 1995, 1 ♂ leg. I. Lubechanskij.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA9381EFF8A8BC7FBA8FF65.taxon	materials_examined	Republic Altai, Kosh-Agachskij district, ” Rodonovyj istochnik ”, 2412 m a. s. l. 49,46 ° N, 88,05 ° E, 5 July 2008, 1 ♂ leg. A. Barkalov.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA9381EFD5189D8FB46FE85.taxon	materials_examined	NW Tuva, 20 km WNW Kara-Khol’ lake, Kalash river, 1850 m a. s. l. 51 ° 31 ’ N, 89 ° 13 ’ E, 8 - 10 June 2008, 2 ♀♀ leg. R. Dudko and I. Lubechanskij.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA9381EFD518878FC0DFE25.taxon	materials_examined	NW Tuva, Ustyu-Eldig-Khem river, 1800 - 1900 m a. s. l. 51 ° 30 ’ N, 89 ° 36 ’ E 15 June 2008, 1 ♂ leg. R. Dudko and I. Lubechanskij.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA9381EFD518B18FCF5FD05.taxon	materials_examined	Republic Altai, Ulaganskij district, Kurajskij mountain range, tundra, 2500 - 2700 m a. s. l. 50,33 ° N, 87,75 ° E, 1 ♂ 3 July 2008 leg. A. Barkalov. A second record of this little known tundra species.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA9381FFD518BF8FF0BFF25.taxon	materials_examined	Republic Altai, Ulaganskij district, Kurajskij mountain range, tundra, 2500 - 2700 m a. s. l. 50,33 ° N, 87,75 ° E, 1 ♂ 3 July 2008 leg. A. Barkalov.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA8381FFFA88818FEC7FE65.taxon	materials_examined	Altai, Shapshal’skij mountain range 2740 - 2876 m a. s. l. 50,5 ° N, 89,8 ° E, tundra, 23 - 25 July 2007, 1 ♀ on floscule of Schultzia crinita (Pall.) Spreng., leg. A. Barkalov.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA8381FFFA888D8FE56FD65.taxon	materials_examined	NW Tuva, 20 km WNW Kara-Khol’ lake, Kalash river, 1850 m a. s. l. 51 ° 31 ’ N, 89 ° 13 ’ E, 8 - 10 June 2008, 1 ♂ leg. R. Dudko and I. Lubechanskij; NW Tuva, Ustyu-Eldig-Khem river, 1800 - 1900 m a. s. l. 51 ° 30 ’ N, 89 ° 36 ’ E 15 June 2008, 2 ♂♂ leg. R. Dudko and I. Lubechanskij.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA8381FFFA88BD8FDDFFCE5.taxon	materials_examined	Krasnoyarsk Territory, Ojskij pass, 1554 m 52,8 ° N 93,3 ° E 21 June 2004 1 ♂ leg. A. Barkalov.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA8381FFFA88A58FF0BFC25.taxon	materials_examined	Barguzinskij Reservation, 21 July 1972 1 ♂ leg. N. Antropova and Krasnoyarsk Territory, Ojskij pass, 1554 m 52,8 ° N 93,3 ° 21 June 2004 1 ♂, 1 ♀ leg. A. Barkalov.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
03FF8733FFA8381FFFA88D18FDAFFB45.taxon	materials_examined	Tuva, Zapadnyj Sajan, upper part of Ak-Khem river, 2100 - 2250 m a. s. l. 51 ° 32 ’ N 89 ° 44 ’ E, 16 June 2008, 1 ♂ leg. R. Dudko and I. Lubechanskij.	en	Barkalov, Anatolii V., Nielsen, Tore R., V., A., R., T. (2009): New material of Central Palaearctic Platycheirus (Diptera, Syrphidae) with description of three new species. Norwegian Journal of Entomology 56: 1-8, DOI: 10.5281/zenodo.15883011
