taxonID	type	description	language	source
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	description	Figs 1 A – E	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	discussion	Notes. Over the past 100 years, questions have been raised around three species: Spilogona hirticauda (Malloch, 1921), Spilogona obsoleta (Malloch, 1920), and Spilogona novaesibiriae (Frey, 1915). Malloch (1921) described Melanochelia hirticauda from St. Paul Island, Alaska. Later, Huckett (1932) compared paratypes of Melanochelia hirticauda with the male holotype of Limnophora obsoleta and considered them identical species. However, Hennig (1959 b) resurrected Spilogona hirticauda (Malloch) as a possibly valid species occurring in Alaska and the Far East of Russia, but this was not followed by Huckett (1965) and Pont (1986). Hennig’s doubts were caused by Frey’s paper (1915), where an unknown species was described and illustrated with the genitalia under the name “ Limnaricia pauxilla (Holmgren, 1869) ” (Fig. 1 C, D). Collin (1930) illustrated a similar form of surstylus in an Alaskan specimen (Savonoki, Naknek Lake) under the name “ Limnophora obsoleta Malloch ”, and synonymized Spilogona pauxilla (Holmgren) with Spilogona megastoma (Boheman, 1866). Hennig studied Frey’s specimens from West Taymyr and the New-Siberian Islands, as well as Collin’s drawings of the Alaskan specimen (Collin, 1930: Plate XIX, 16 b 1), and concluded that these specimens belong to Spilogona hirticauda. Hennig indicated that these specimens are very close to Spilogona novaesibiriae and Spilogona obsoleta but differ significantly from both in the male genitalia (Fig. 1 E). Relatively recently, Sorokina and Michelsen (2014) supported the view that Spilogona hirticauda (Malloch) is a synonym of Spilogona obsoleta and Spilogona novaesibiriae. This opinion, like the opinion of probably many other researchers, was based on the fact that Frey’s illustrations (1915: Taf. II, Figs 23 – 24) and Hennig’s illustrations (1959 a: Taf. XV, Fig. 312) show Spilogona obsoleta from different perspectives. However, I recently received muscid material for identification from Franz Josef Land. The specimens are very similar to Spilogona novaesibiriae. I examined the male genitalia and they are absolutely identical with Frey’s illustrations (1915: Taf. II, Figs 23 - 24) and Hennig’s illustrations (1959 a: Taf. XV, Fig. 312), and they are completely different from the genitalia of Spilogona obsoleta from the same perspective. My first thought was that Hennig was right and Spilogona hirticauda is a valid species. Unfortunately, the type specimens of Spilogona hirticauda were not dissected and it is not possible at this time to study the type to confirm this statement. Huckett (1932) studied a paratype and noted that the description of Melanochelia hirticauda is entirely consistent with Spilogona obsoleta. After studying Malloch’s description of Melanochelia hirticauda (1921), I found several distinctive differences from the specimens from Franz Josef Land and, therefore, from Hennig’s description. In addition to the structure of the male genitalia, these differences include the width of frons, the face in profile, the chaetotaxy of legs, and colour of female scutum. In addition, the locality of Melanochelia hirticauda is significantly further south than the locality of specimens from Franz Josef Land and of Frey’s specimens from the New Siberian Islands. I have thus concluded that the species discussed by Hennig is not Spilogona hirticauda but is a species new to science. The new species appears therefore to be an exclusively arctic species that also inhabits the high Arctic of the Nearctic region, and so it may be found among series of Spilogona obsoleta in museum collections. As regards of the Alaskan specimen (Savonoski, Naknek Lake) described by Collin (1930: 272, Plate XIX, 16 b 1), the surstylus is similar to the new species in its bend, but the shape is different: the surstylus does not protrude much above the epandrium; the cerci are also wide, as in Spilogona obsoleta. In view of these characters and the more southern locality of the Alaskan specimen, it is most unlikely that it belongs to the new species.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	materials_examined	Type material: Holotype ♂, RUSSIA, Franz Josef-Land: Hooker Island, stream, 37 m, 80 ° 20 ’ N 52 ° 48 ’ E, 10. viii. 2016, leg. A. Krasheninnikov (SZMN). Paratypes: RUSSIA, Franz Josef Land: 1 ♂ 2 ♀♀, Hayes Island, Cape Observatorskii, tundra, 3. viii. 2012, leg. I. Mizin; 1 ♀, Kane Island, Cape Gagara (Loon), coastal tundra, 81 ° 05 ’ N 58 ° 30 ’ E, 9. viii. 2013, leg. M. Gavrilo; 3 ♀♀, Hooker Island, Tikhaya Bay, tundra, 80 ° 20 ’ N 52 ° 48 ’ E, 4, 5, 17. viii. 2014, leg. M. Gavrilo; 2 ♀♀, Hooker Island, stream, 80 ° 20 ’ N 52 ° 48 ’ E, 10. viii. 2016, leg. A. Krasheninnikov; 1 ♀, Hooker Island, Tikhaya Bay, polar station, 80 ° 20 ’ N 52 ° 46 ’ E, 41 m, 10. viii. 2016, leg. A. Krasheninnikov; 7 ♀♀, Aldzhera Island, stream, 80 ° 22 ’ N 55 ° 50 ’ E, 13 m, 17. viii. 2016, leg. A. Krasheninnikov (all in SZMN).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	etymology	Etymology. The species name is a patronym in honour of the famous dipterologist W. Hennig, who was the first to describe and illustrate it.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	diagnosis	Diagnosis. The new species is very similar to Spilogona novaesibiriae (Frey, 1915) and can be separated from it as follows:	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	description	Description. Hennig gave a good description of this species under the name “ Spilogona hirticauda ” and pointed out its great similarity to Spilogona novaesibiriae (Hennig, 1959 b: 302). All the differences found between these two species are indicated in the diagnosis above. As further differences, Hennig in his key (1959 a: 260) also described a white wing and a completely yellow haltere for Spilogona novaesibiriae but a yellowish wing and a brown-black haltere for “ Spilogona hirticauda ”. However, these characters are variable as the series of Spilogona novaesibiriae as well as in the series of Spilogona hennigi sp. nov.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	discussion	Comment. Because the type series has been extracted and pinned from alcohol, the flies are not in very good condition, which makes description difficult.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFCAFF0478EF9D33FEB5FD83.taxon	distribution	Distribution. PALAEARCTIC: Russia (Arctic Siberia: Franz Josef Land, West Taymyr, New-Siberian Islands).? NEARCTIC.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC8FF0A78EF9E7EFC15FDA7.taxon	description	Figs 2 A – I	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC8FF0A78EF9E7EFC15FDA7.taxon	materials_examined	Type material: Holotype ♂, RUSSIA, Wrangel Island: 4 km N Somnitil’naya Bay, valley of the River Somnitil’naya, on flowers of Potentilla emarginata, 28. vii. 1972, leg. K. Gorodkov (ZISP). Paratypes: RUSSIA, Wrangel Island: 2 ♂♂ 2 ♀♀, same data as holotype (SZMN); 3 ♀♀, 5 km N Somnitil’naya Bay, valley of the River Somnitil’naya, 150 m, 25. vii. 1972, leg. K. Gorodkov (SZMN); 1 ♂, Somnitil’naya Bay, south of island, bank of the River Somnitil’naya, on flowers of Potentilla emarginata, 26. vii. 1966, leg. K. Gorodkov (ZISP); 1 ♂ 1 ♀, Somnitil’naya Bay, south of island, tundra, on flowers of Dryas integrifolia, 19. vii. 1966, leg. K. Gorodkov (ZISP); 5 ♀♀, 5 km N Somnitil’naya Bay, south of island, middle part of the River Somnitil’naya, Mineeva Mts, 23. vii. 1971, leg. K. Gorodkov (ZISP); 1 ♂, 15 km W Rodzhers Bay, south of island, 18. vii. 1971, leg. K. Gorodkov (ZISP).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC8FF0A78EF9E7EFC15FDA7.taxon	etymology	Etymology. The species name is a patronym in honour of the celebrated Soviet dipterist Kirill B. Gorodkov (Russia), who collected the type series of this species as well many other new Muscidae.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC8FF0A78EF9E7EFC15FDA7.taxon	diagnosis	Diagnosis. The new species is similar to Nearctic Spilogona rufitarsis (Stein, 1920) because of 4 pairs of postsutural dorsocentral setae, facial edge not projecting beyond level of profrons, broad frons, anepisternum without interspatial setae, mid tibia without v setae, hind femur with pv setae on proximal half, scutellum without downwardly-directed preapical setulae on upper border of declivities, grey abdomen with black spots and a narrow brown median stripe between them. But the new species differs from Spilogona rufitarsis by the wider frons, dusted prementum, black fore tibia and tarsi, darker colour of thorax, blackish haltere, wide parafacial which is 1.2 – 2.0 times width of postpedicel at level of base of antenna, and postgenital plate with spinules.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC8FF0A78EF9E7EFC15FDA7.taxon	description	Description: Male: body 5.6 – 5.8 mm, wing 5.0 – 5.2 mm. Head: Ground-colour black. Frons, fronto-orbital plate, gena and parafacial shining silvery-grey, with dark reflections when viewed in profile. In lateral view, facial edge not projecting beyond level of profrons (Fig. 2 A). Eye large, bare or with very sparse and inconspicuous hairs. Fronto-orbital plates separated by a wide black frontal vitta. Distance between eye margins on upper part of frons about as wide as distance between the first pair of dc setae, sometimes a little narrower. Frontal triangle small, grey dusted, not extending to middle of frons. Frons with 8 – 9 pairs of strong frontal setae and hair-like setae between them. Parafacial at level of base of antenna 1.2 – 1.3 times width of postpedicel, very weakly narrowing below. Height of gena about 1 / 4 of height of eye and 1.8 – 2 times width of postpedicel. Antenna black, postpedicel approximately 1.5 times as long as wide. Arista black, thickened at base, short pubescent, with the longest individual hairs shorter than basal diameter of arista. Palpus black. Proboscis short, thin, prementum broadly dusted in middle. Labella large. Thorax: Ground-colour black, densely grey dusted, with three distinct brown longitudinal stripes widening diffusely to scutellum (Fig. 2 B). Presutural acr setae in 2 even rows, 2 + 4 dc setae. Notopleuron bare, or with individual hairs in upper part. Anepisternum without interspatial setae. Katepisternal setae 1 + 1. Scutellum brown dusted except grey at apex, without downwardly-directed preapical setulae on upper border of declivities. Wing: Light brownish tinged. Costa without spinules or costal spine. Calypters whitish, lower one with broadly yellow margins. Haltere brown with blackish knob. Legs: Ground colour black, grey dusted. Fore tibia with 1 p seta. Mid femur with a row of hair-like pv and avv setae, which become more numerous and elongate towards base of pv surface, with 2 pd – p preapical setae. Mid tibia with 0 – 1 ad and 3 pd setae, without any v setae. Hind femur with 6 – 7 strong av setae in distal third and with hair-like setae at base on av-v-pv surfaces which are longer on pv surface. Hind tibia with 1 – 3 short av, 4 – 5 ad, 3 – 4 pd, without pv setae. Abdomen: Black with dense grey dust, conical. Tergites 1 + 2 – 4 with black triangular spots separated by a narrow brown median stripe, tergite 5 with a diffuse brown median stripe. Sternite 1 with hairs, sternite 5 somewhat protruding, a little longer then sternite 4, with a deep median notch and a pointed caudal margin, with shining apex (Figs 2 E, I). Terminalia: In lateral view cerci wide, curved, sharply tapered towards the apex; surstylus rounded at apex, with hairs inside, not longer then cerci; epandrium large, hemispherical; hypandrium 2 times shorter then epandrium (Figs 2 D, G); cercal plate triangular (Fig. 2 H). Female: body 5.8 – 6.5 mm, wing 5.5 – 5.8 mm. Similar to male but differing as follows: Head: Frons, fronto-orbital plate, gena and parafacial grey or brown dusted (Fig. 2 C). Frontal triangle brownish dusted, extending to middle of frons. Width of frontal vitta 3 – 4 times width of a fronto-orbital plate. Fronto-orbital plate with 2 pairs of orbital setae. Parafacial at level of base of antenna 2 times width of postpedicel. Height of gena about 1 / 3 of height of eye. Proboscis thickened. Thorax: Scutum more matt. Scutellum with brown spots on lateral angles. Legs: Mid femur with a row of hair-like pv which become more elongate towards base; only several short av-v hairs at base. Mid tibia with 0 ad and 2 – 3 pd. Hind femur with 4 – 5 strong av setae in distal third; hair-like setae at base short and sparse on av-v surface, longer on pv surface. Hind tibia with 3 – 4 ad, 2 – 3 pd pv setae. Abdomen: Postgenital plate with spinules and hairs (Fig. 2 F).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC8FF0A78EF9E7EFC15FDA7.taxon	distribution	Distribution. PALAEARCTIC: Arctic Russia (Wrangel Island).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC6FF0878EF9E9AFCC3FB5F.taxon	description	Figs 3 A – I	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC6FF0878EF9E9AFCC3FB5F.taxon	materials_examined	Type material: Holotype ♂, RUSSIA, Wrangel Island: Somnitil’naya Bay, valley of the River Somnitil’naya, Mineeva Mts, 150 м, on flowers of Potentilla emarginata, 19. vii. 1966, leg. K. Gorodkov (ZISP). Paratypes: RUSSIA, Wrangel Island: 1 ♀, Somnitil’naya Bay, valley of the River Somnitil’naya, south of island, Mineeva Mts, 250 м, 22. vii. 1966, leg. K. Gorodkov (ZISP); 2 ♀♀, Somnitil’naya Bay, south of island, 22, 26. vii. 1966, leg. K. Gorodkov (SZMN); 2 ♂♂ 4 ♀♀, middle part of the River Neozhidannaya, 71 ° 01 ’ N 179 ° 09 ’ W, yellow pan traps, 12 – 16. vii. 2016, leg. L. Volkova (SZMN, 1 ♂ — BUIC-DIP 1761, 1 ♀ — BUIC-DIP 1762); 1 ♀, middle part of the River Neozhidannaya, valley of river, 71 ° 01 ’ N 179 ° 08 ’ W, yellow pan traps, 10. vi. – 27. vii. 2016, leg. L. Khruleva (SZMN); 1 ♀, middle part of the River Neozhidannaya, 71 ° 01 ’ N 179 ° 09 ’ W, yellow pan traps, 8, 9. vii. 2019, leg. L. Khruleva (SZMN); 2 ♂♂ 1 ♀, Tundrovii Mt., 71 ° 16 ’ N 179 ° 53 ’ W, yellow pan traps, 8 – 10. vii. 2018, leg. U. Babii (SZMN); 2 ♀♀, Tundrovii Mt., 71 ° 18 ’ N 179 ° 48 ’ W, yellow pan traps, 7 – 11. vii. 2019, leg. U. Babii & O. Khruleva (SZMN); 1 ♀, middle part of the River Mamontovaya, 71 ° 10 ’ N 179 ° 45 ’ W, yellow pan traps, 2 – 7. vii. 2015, leg. O. Khruleva (SZMN, BUIC-DIP 1763); 1 ♀, upper reaches of the River Neizvestnaya, 71 º 13 ’ N 170 º 19 ’ W, yellow pan traps, 4 – 11. vii. 2015, leg. O. Khruleva (SZMN).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC6FF0878EF9E9AFCC3FB5F.taxon	etymology	Etymology. The species name is based on the Latin words “ latus ” and “ zygoma ” meaning “ wide cheekbones ”, because the parafacial is very broad.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC6FF0878EF9E9AFCC3FB5F.taxon	diagnosis	Diagnosis. The new species is very similar to Spilogona tendipes (Malloch, 1920) because of its large size, covering of dense grey dusting with a bluish or greenish tinge and having paired dark marks visible on abdomen, a projecting lower face, small eyes, very broad parafacial, long and slender haustellum with a shiny prementum and slender and elongate labella, 4 pairs of postsutural dorsocentral setae, hind tarsus with a v seta near base, and hypoproct with recurrent spines. But the new species differs substantially from Spilogona tendipes by the absence of ventral seta on mid tibia, distinct long pv in basal half of hind femur, numerous hair-like av setae in basal half of all femora, long ground-setulae of scutum, long setae on sternites 3 – 5, more greenish tinge of body, almost inconspicuous hairs on eye, and the male terminalia.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC6FF0878EF9E9AFCC3FB5F.taxon	description	Description: Male: body 5.3 – 5.7 mm, wing 4.8 – 5.0 mm. Head: Ground-colour black. Frons, fronto-orbital plate, gena and parafacial shining silvery-grey or silverybrown, with dark reflections when viewed in profile. In lateral view, facial edge projecting beyond level of profrons (Fig. 3 A). Eye small, bare or with very sparse and inconspicuous hairs. Fronto-orbital plates separated by a wide frontal vitta. Distance between eye margins on upper part of frons about as wide as ocellar triangle (Fig. 3 B). Frontal triangle extending to middle of frons. Frons with 12 – 14 pairs of strong frontal setae. Parafacial at level of base of antenna 1.5 – 2 times width of postpedicel, not narrowing below. Height of gena about 1 / 3 – 1 / 4 of height of eye and 1.5 – 2 times width of postpedicel. Antenna black, postpedicel approximately 1.5 times as long as wide. Arista black, bare, thickened in basal half. Palpus black. Proboscis long, slender, prementum shining. Labella slender and elongate, crocheted relative to the proboscis. Thorax: Ground-colour black, densely grey dusted with a bluish or greenish tinge, with two brown indistinct presutural longitudinal stripes when viewed from in front. Ground-setulae of scutum relatively long, hair-like. Presutural acr setae in 3 – 4 uneven rows, 2 + 4 dc setae. Notopleuron bare, or with individual hairs. Anepisternum with 2 – 3 interspatial setae. Katepisternal setae 1 + 1. Scutellum grey dusted, with downwardly-directed preapical setulae on upper border of declivities. Wing: Light brownish tinged, with dark base. Costa without spinules or costal spine. Calypters whitish, with light yellow margins. Haltere brown with blackish knob. Legs: Ground colour black, grey dusted. Fore tibia with 2 – 4 p setae. Fore femur with numerous long hair-like setae on posterior surface, with a row of short hair-like av setae. Mid femur with a row of long pv setae and with a row of short hair-like av-v setae, with 2 pd – p preapical setae. Mid tibia with 2 – 3 ad and 3 pd setae, without any v setae. Hind femur with a row of long av setae becoming shorter on basal third, with a row of long pv setae in basal half, with numerous long hair like setae on basal part of posterior surface. Hind tibia with 3 – 5 av, 4 – 6 ad, with an uneven row of long pd-p setae in middle part, without pv setae. First tarsomere of hind tarsus with strong v seta near base. Abdomen: Black with dense bluish-grey dust, conical. Tergites 1 + 2 – 4 with large brown triangular marks separated by a brown median stripe, sometimes fused, tergite 5 with a brown median stripe. Sternite 1 bare or with individual hairs, sternites 2 – 5 with numerous long setae, especially sternite 5, sternite 5 large, longer then sternite 4, with a deep median notch, and a pointed caudal margin (Figs 3 E, I). Terminalia: In lateral view cerci wide in proximal half and narrow, rod-shaped in distal half, curved; surstylus rounded at apex, with a notch in ventral margin, shorter than cerci; epandrium large, hemispherical; hypandrium 2 times shorter then epandrium, with a wavy ventral margin (Figs 3 D, G). Cercal plate oval with two apical prolongations (Fig. 3 H). Female: body 6.2 – 7.3 mm, wing 5.7 – 6.7 mm. Similar to male but differing as follows: Head: Frons, fronto-orbital plate, gena and parafacial densely brown dusted, contrasting with the greenish-bluish-grey occiput (Fig. 3 C). Frontal vitta matt grey, contrasting with brown fronto-orbital plate and frontal triangle when viewed from above. Width of frontal vitta 2 – 2.3 times width of a fronto-orbital plate. Frontal triangle brown dusted, extending to lunule. Fronto-orbital plate with an uneven row of frontal and orbital setae. Parafacial at level of base of antenna 2 – 2.3 times width of postpedicel. Height of gena about 1 / 2 – 1 / 3 of height of eye. Thorax: Colour lighter, with greenish-bluish-grey dust. Scutum with 3 brown longitudinal stripes, sometimes indistinct, not extending to scutellum. Abdomen: Postgenital plate with weak individual spinules.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC6FF0878EF9E9AFCC3FB5F.taxon	distribution	Distribution. PALAEARCTIC: Arctic Russia (Wrangel Island). DNA barcode. BOLD BIN: BOLD: ADZ 7218. See Table 1 for GenBank accession numbers.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC6FF0878EF9E9AFCC3FB5F.taxon	discussion	Remarks. Spilogona latizygoma morphological is very similar to Spilogona tendipes. But based on DNA barcodes, these species are genetically different; the p-distance between them is 3.36 %. The intraspecific distance of Spilogona latizygoma specimens ranges from 0.0 % to 0.16 %.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC4FF0978EF994AFF76FB5B.taxon	materials_examined	Notes. The type material of Limnophora ciliatocosta (in ZISP) and Spilogona contigua (in CNC) was examined. The descriptions of both species and the male terminalia are the same. However, the illustrations of the male terminalia of Spilogona ciliatocosta by Hennig (1959 a: Taf. XV, Fig. 299) and of Spilogona contigua by Huckett (1965: 352, Fig. 165) are slightly different in the width of the surstylus. I examined many specimens of Palaearctic Spilogona ciliatocosta and Nearctic Spilogona contigua and I have concluded that the width of the surstylus depends on the angle of viewing the terminalia and is variable. The cercal plate of these species is very distinctive because of the different length of right and left cerci (Huckett, 1965: 346, Fig. 96). Hennig in his monograph illustrated the male terminalia (Hennig, 1959 a: Taf. XIII, Fig. 276; 1959 b: Taf. XVIII, Fig. 361) of a specimen from Wrangel Island named as “ Limnophora macropyga Frey ” (det. A. Stackelberg). These figures correspond well with both ciliatocosta and contigua. I examined this specimen and found that the terminalia is mounted on a permanent slide preparation, which is why it is slightly compressed, and the surstylus thus appears wider than that of the Hennig’s figure of the type of Limnophora ciliatocosta. Unfortunately, the terminalia of the syntype of Limnophora ciliatocosta is also mounted on a poorly prepared permanent mount, and it was impossible to describe the form and exact width of the surstylus. Specimens of both sexes of these species are distinctive, with a completely black body, facial edge projecting beyond level of profrons, mid tibia with v setae and hind femur without pv setae, scutellum with downwardly-directed preapical setulae on upper border of declivities, shining prementum, and costa with costal spinules. I therefore conclude that Spilogona contigua Huckett, 1965 is a new junior synonym of Limnophora ciliatocosta Schnabl, 1915. In the ZISP, apart from the male syntype of Limnophora ciliatocosta there is a female named as Limnophora ciliatocosta. The locality is the same as the male (Karskaja Tundra). However, this specimen does not agree with the male syntype of Limnophora ciliatocosta. Hennig (1959 a) also had doubts about the identity of this female. The female syntype of Limnophora ciliatocosta does not have the facial edge projecting beyond level of profrons, costa with very strong costal spines, mid tibia without v setae and hind femur with several pv setae, proboscis short and thickened, prementum dusted, body with grey dust, not black, thorax grey with three distinct brown longitudinal stripes and with 2 + 3 dc setae, abdomen wet, but with traces of paired brown spots, postgenital plate with hairs. This female is definitely a different species and the specimen runs to Spilogona tornensis (Ringdahl, 1926). Spilogona ciliatocosta is very similar to Spilogona tundrae (Schnabl, 1915). These species can be separated as following couple:	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC4FF0978EF994AFF76FB5B.taxon	distribution	Distribution. PALAEARCTIC: Russia (Arctic Siberia and Far East). NEARCTIC: Alaska, Yukon, NWT, Quebec.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC5FF0E78EF9906FB58FE4B.taxon	description	Figs 4 A – C	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC5FF0E78EF9906FB58FE4B.taxon	description	Thus, Spilogona churchillensis Huckett, 1965 is valid species and is not a junior synonym of Spilogona quinquesetosa (Schnabl, 1915). Spilogona churchillensis has an arcto-alpine distribution, whereas Spilogona quinquesetosa has an arctic distribution.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC5FF0E78EF9906FB58FE4B.taxon	distribution	Distribution. PALAEARCTIC: Siberia (Altai Mts). NEARCTIC: Manitoba. DNA barcode. BOLD BIN: BOLD: AAB 7605. See Table 1 for GenBank accession numbers.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC3FF0F78EF9C83FE7DF9FE.taxon	description	Figs 4 E – K Scatocoenosia cordyluraeformis Schnabl in Becker et al., 1915: 3. Type-locality: “ in der Karskaja Tundra ” [RUSSIA, West Siberia, Yugorskiy Peninsula, Kara district; actually Yamalo-Nenetskiy AO, east slope of Polar Urals, Mt Minisey, 180 m, 21. vii. 1909, F. Zaitsev] [seen].	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC3FF0F78EF9C83FE7DF9FE.taxon	materials_examined	According to Huckett (1965: 217), Spilogona dorsostriata differs from Spilogona albinepennis by “ four black glossy stripes on mesonotum, which often fuse or merge together, thus partly blurring their identity as separate stripes ”. In my opinion, the pattern of scutal stripes cannot be a reliable character for describing a new species, given that reliable characters such as the width of the frons, small subequal calypters etc. are the same in both species. The types of both species were examined by the author in Canadian National Collection. Additionally, 77 females and 74 males with the same characters were found in unsorted material from different populations in Canada (Yukon, NWT, Quebec). It was impossible to separate these specimens into two species, as the dusting varied greatly, from completely matt, to glossy streaks, to narrow glossy stripes and to broad glossy marks (Figs 4 E – K). I also dissected the male terminalia in specimens from different populations with different scutal markings, and they were the same. The descriptions and the male terminalia of Spilogona dorsostriata and Spilogona albinepennis are identical with those in the recently discussed Spilogona cordyluraeformis. The differences between all these species consist only in the different degrees of brown pollination on the scutum. Scatocoenosia cordyluraeformis was described only from the female and for a long time raised questions as to its correct family assignment. A large series of males and females of this species from Cape Otto Schmidt, Taymyr and Wrangel Island enabled us to resolve these issues (Sorokina & Pont, 2013; Sorokina & Tridrikh, 2021). The female holotype of Scatocoenosia cordyluraeformis has a shining scutum with a median dusted vitta. Specimens from Taymyr have a shining, or subshining, or dusted scutum; specimens from Wrangel Island mostly have a completely dusted scutum; specimens from Cape Otto Schmidt have a completely shining scutum, or with a narrow median dusted vitta. In my opinion, the dusting of the scutum is a variable character. I can therefore conclude that Spilogona albinepennis Huckett, 1965 and Spilogona dorsostriata Huckett, 1965 are new junior synonyms of Scatocoenosia cordyluraeformis Schnabl, 1915.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC3FF0F78EF9C83FE7DF9FE.taxon	distribution	Distribution. PALAEARCTIC: Russia (Yamalo-Nenez AO, Taymyr, Wrangel Island). NEARCTIC: Alaska, Yukon, Nunavut / NWT, Quebec.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC3FF0C78EF9AA1FB5BFD57.taxon	materials_examined	Additional material examined. RUSSIA, Republic of Mordovia: 1 ♂ 1 ♀, Temnikov, bank of Moksha River, 54 ° 37 ’ 33.2 ” N 43 ° 11 ’ 57.8 ” E, 3. viii. 2020, leg. K. Tomkovich (ZMUM). Novosibirsk area: 1 ♂, Novosibirsk, the arboretum, 30. v. 2005, leg. V. Sorokina; 1 ♀, the same data, but 12. vii. 2008. Magadan area: 1 ♀, ~ 100 km NNE Seimchan, Nature Reserve “ Magadansky ”, 63 ° 39 ’ N 153 ° 16 ’ E, larch forest, sweeping in grass, 4. vii. 2019, leg. N. Tridrikh; 1 ♀, the same data, but in yellow pan trap, 10. vii. 2019; 1 ♀, ~ 100 km NNE Seimchan, Nature Reserve “ Magadansky ”, 63 ° 39 ’ N 153 ° 17 ’ E, valley of Suksukan River, thickets of young willow, sweeping in grass, 13. vii. 2019, leg. N. Tridrikh; 8 ♀♀, the same data, but 17. vii. 2019; 1 ♀, the same data, but sweeping over river pebble, 24. vii. 2019; 2 ♀♀, the same data, but on house window, 8. vii. 2019 (SZMN, except where stated otherwise).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC3FF0C78EF9AA1FB5BFD57.taxon	distribution	Distribution. PALAEARCTIC: Austria, Czech Republic, Denmark, Estonia, Finland, Germany, Latvia, Norway, Poland, Russia (Europe, Siberia, Far East), Sweden. NEARCTIC: Alaska to NWT & Manitoba, Montana, Washington, California. DNA barcode. BOLD BIN: BOLD: AAL 6514. See Table 1 for GenBank accession numbers.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC0FF0C78EF9F0AFC70F987.taxon	description	Fig. 5 A	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC0FF0C78EF9F0AFC70F987.taxon	description	This species is distinctive with an intensive yellow base of the wings, including veins, and densely yellowish calypters (Fig. 5 A); also it is large in size (8 – 9 mm) with haired notopleuron, anepisternum without interspatial setae, scutellum without preapical setulae on upper border of declivities, mid tibia without v setae, hind femur without pv setae, and proboscis short with dusted prementum. In the holotype the left fore leg is missing, whilst the allotype is without mid and hind legs.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC0FF0C78EF9F0AFC70F987.taxon	distribution	Distribution. PALAEARCTIC: Russia (Far East). NEARCTIC: Alaska.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC0FF0D78EF9A7AFA03FE4B.taxon	description	Figs 5 B – G	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC0FF0D78EF9A7AFA03FE4B.taxon	materials_examined	Notes. The type material of Spilogona compacta (in Canadian National Collection) and European and Asian specimens of Spilogona lapponica were examined. The descriptions of both species and the male terminalia are the same. Males of this species are very distinctive with a very broad frons; a stout thick abdomen with an unusually large sternite 5 (Fig. 5 B, F); costa with a strong costal spine in both sexes (Figs 5 D, E); mid tibia usually with ad setae and hind femur usually with several short pv setae. I conclude that Spilogona compacta Huckett, 1965 is a new junior synonym of Spilogona lapponica (Ringdahl, 1932). There is no description of the female of Spilogona lapponica in Hennig (1959 b), but there is the description of the female of Spilogona compacta in Huckett (1965: 215). Additional material examined. RUSSIA, Magadan area: 3 ♂♂ 2 ♀♀, ~ 100 km NNE Seimchan, Nature Reserve “ Magadansky ”, valley of Suksukan River, 63 ° 39 ’ N 153 ° 17 ’ E, thickets of young willow, sweeping in grass, 17. vii. 2019, leg. N. Tridrikh (SZMN).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC0FF0D78EF9A7AFA03FE4B.taxon	distribution	Distribution. PALAEARCTIC: Norway, Russia (Europe, Far East), Sweden. NEARCTIC: Alaska, Quebec.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC1FF0D78EF9E36FF76F87C.taxon	description	Figs 5 H – J	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC1FF0D78EF9E36FF76F87C.taxon	materials_examined	The type material of Spilogona padlei and Spilogona perambulata (in Canadian National Collection) has been examined. The descriptions of both species and the male terminalia are the same. Both species have sternite 1 with fine hairs, anepisternum without interspatial seta, scutellum with 2 long downwardly-directed preapical setulae on upper border of declivities, and male mid femur with 1 – 2 stout pv setae at base. However, Huckett noted in the description of Spilogona padlei “ … mid femur with 2 or 3 fine pv, .. ”, and “ … mid femur with a few weak pv … ” for Spilogona perambulata. The mid femur of Spilogona padlei really does have a row of weak short pv setae in addition to stout pv seta. Huckett probably did not notice the stout setae because the mid legs are tucked close to the thorax. The mid tibia of Spilogona padlei is actually unlike that of Spilogona perambulata by possessing very short v setae. Since only 6 specimens (5 males and 1 female) of Spilogona padlei have been described from one locality (NWT, Padlei), it can be assumed that the short v setae are a variation of this character in one generation and not enough to describe a separate species. The male terminalia of Spilogona padlei and Spilogona perambulata from different generations is the same (Fig. 5 H). The sternite 5 is especially distinctive because the two small tubercles at middle are visible in dry specimens (Fig. 5 I). The females of both species are also identical; the ovipositor is especially distinctive, with large coarse hook-shaped spinules on the postgenital plate (Fig. 5 J). I therefore conclude that Spilogona perambulata Huckett, 1965 and Spilogona padlei Huckett, 1965 are both new synonyms, and as they were both published in the same work and on the same page I select as first reviser Spilogona padlei as the valid name for this species. Additional material examined. RUSSIA, Taymyr Peninsula: 1 ♂, Verkhnyaya Taimyra River, mouth of Logata River, willow forest in floodplain, 30. vii. 1967, leg. K. Gorodkov (ZISP). Wrangel Island: 1 ♂ 7 ♀, lower reaches of Somnitel′naya River, 70 º 56 ’ N 179 º 37 ’ W, yellow pan trap, 7 – 10. vii. 2019, leg. P. Kulemeev & O. Khruleva. Magadan area: 2 ♀, 120 km NNE Seimchan, Lyadinoi stream, 63 ° 44 ’ N 153 ° 25 ’ E, yellow pan trap, 10. vii. 2019, leg. N. Tridrikh; 2 ♀, ~ 100 km NNE Seimchan, Nature Reserve “ Magadansky ”, 63 ° 39 ’ N 153 ° 17 ’ E, valley of Suksukan River, thickets of young willow, white pan trap, 13. vii. 2019, leg. N. Tridrikh; 2 ♀, the same data, but yellow pan trap, 21 – 24. vii. 2019; 1 ♀, the same data, but pebble beach, pan trap, 24. vii. 2019; 1 ♀, 10 km N Evensk, Tainyi stream, 61 ° 55 ’ N 159 ° 16 ’ E, 25. vii. 2020 leg. N. Tridrikh; 1 ♀, 10 km W Evensk, Malaya Garmanda River, 61 ° 52 ’ N 159 ° 23 ’ E, sweeping in grass, 01. vii. 2020, leg. N. Tridrikh (SZMN except where stated otherwise).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFC1FF0D78EF9E36FF76F87C.taxon	distribution	Distribution. PALAEARCTIC: Russia (Arctic Siberia, NE of Far East). NEARCTIC: NWT, Alaska, Yukon, Quebec.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDFFF1378EF9C83FB5BF9AB.taxon	description	Fig. 6 B	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDFFF1378EF9C83FB5BF9AB.taxon	description	Specimens of Spilogona pusilla in the CNC were examined. The paratype of Spilogona pusilla [Nettilling Lake, Baffin Land, July 9, 1925, J. D. D. Soper] and a long series of specimens from Clyde, Baffin Island, belong to Spilogona humeralis Huckett, 1965. Among specimens of Spilogona pusilla I also found female specimens of Spilogona atrisquamula Hennig, 1959 and male specimens of Spilogona subfuscisquama from Salmita Mines (NWT). All correctly identified specimens of Spilogona pusilla in this collection have hind femur on basal half with short, weak but distinct pv setae. The terminalia are the same in specimens from different localities which fit the terminalia of Spilogona albisquama, and in these specimens the colour of calypters varies from light yellow to brownish. I examined and dissected the holotype of Spilogona pusilla. The type has hind femur with short weak pv setae, lower calypter a little darkened but not much, and the terminalia fits Spilogona albisquama. I therefore conclude that Limnophora (Spilogona) albisquama Ringdahl, 1932 is a new junior synonym of Limnophora (Spilogona) pusilla Huckett, 1932, but Spilogona subfuscisquama Ringdahl (1932) is valid species (see below).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDFFF1378EF9C83FB5BF9AB.taxon	materials_examined	Additional material examined. RUSSIA, Magadan area: 1 ♀, 100 km NNE Seimchan, Nature Reserve “ Magadansky ”, 63 ° 38 ’ N 153 ° 16 ’ E, shrub swamp, sweeping in grass, 15. vii. 2019, leg. N. Tridrikh; 1 ♀, the same data, but larch woodland, 24. vii. 2019; 1 ♀, the same data, but 63 ° 39 ’ N 153 ° 17 ’, cotton grass swamp, 25. vii. 2019; 1 ♀, the same data, but 63 ° 41 ’ N 153 ° 22 E’, Karasevoe lake, 25. vii. 2019 (all SZMN).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDFFF1378EF9C83FB5BF9AB.taxon	distribution	Distribution. PALAEARCTIC: Finland, Norway, Russia (Siberia and Far East), Sweden. NEARCTIC: Alaska, Yukon, NWT, Manitoba, Quebec, Labrador. DNA barcode. BOLD BIN: BOLD: ACR 4125. See Table 1 for GenBank accession numbers.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDFFF1078EF9A97FB63FDD8.taxon	description	Fig. 4 D	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDFFF1078EF9A97FB63FDD8.taxon	materials_examined	Notes. The type material of Limnophora quinquesetosa Schnabl (in ZISP) and Spilogona barrowensis Huckett (in Canadian National Collection) was examined. The descriptions of both species and the male terminalia are the same. This is black species with brown dust, without marks on scutum and abdomen, a shining prementum, with preapical setulae on upper border of declivities of scutellum, facial edge not projecting beyond level of profrons, strong av, v, pv setae on mid tibia, and hind femur without pv setae. According to Huckett’s description (1965), the posthumeral and notopleural regions are pale in Spilogona barrowensis, but in the holotype and the paratypes of this species these regions are brown dusted as in Limnophora quinquesetosa. I therefore conclude that Spilogona barrowensis Huckett, 1965 is a new junior synonym of Limnophora (Spilogona) quinquesetosa Schnabl, 1915. Additional material examined. RUSSIA, Yamalo-Nenets AO: 3 ♀, Gydanskiy Proliv, Shokalsky Island, 72 ° 58 ’ N 72 ° 27 ’ E, swamp by a stream (1 ♀), arctic fox hole (1 ♀), tundra (1 ♀), 4 – 25. viii. 2016, leg. A. Nikhaeva & M. Bizin (BUIC-DIP 2175, BUIC-DIP 2176) (all SZMN). DNA barcode. BOLD BIN: BOLD: AEK 7965. See Table 1 for GenBank accession numbers.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDFFF1078EF9A97FB63FDD8.taxon	distribution	Distribution. PALAEARCTIC: Russia (Arctic Siberia). NEARCTIC: Alaska (Point Barrow).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDCFF1078EF9E87FC25FAD1.taxon	description	Figs 5 K – M	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDCFF1078EF9E87FC25FAD1.taxon	description	I therefore conclude that Tetramerinx brevicornis Malloch, 1917 is a new junior synonym of Limnophora (Spilogona) scutulata Schnabl, 1911.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDCFF1078EF9E87FC25FAD1.taxon	distribution	Distribution. PALAEARCTIC: Austria, Belgium, China (Shanxi, Gansu), Czech Republic, Denmark, Finland, Germany, Great Britain, Hungary, Norway, Poland, Russia (Europe), Slovakia, Sweden. NEARCTIC: Oregon, NWT to Colorado & S Dakota, New York, Manitoba, Quebec, Maine.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDCFF1678EF998AFC70FC00.taxon	description	Fig. 6 C	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDCFF1678EF998AFC70FC00.taxon	description	Among specimens of Spilogona pusilla in the CNC I found specimens of Spilogona subfuscisquama from Salmita Mines (N. W. T). In this collection, some specimens of Spilogona subfuscisquama from Fort Churchill (Manitoba) were also found among Spilogona aenea Huckett, 1965. All these specimens had hind femur without any pv setae and the male terminalia as in Hennig’s figures of Spilogona subfuscisquama (Hennig, 1959 b: Taf. XVIII, fig. 354). The colour of the calypters of these specimens is variable from light yellow to brownish.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDCFF1678EF998AFC70FC00.taxon	materials_examined	Material examined. CANADA, NWT: 4 ♂♂, Salmita Mines, 64 ° 05 ’ N 111 ° 15 ’ W, N. W. T., 4. vii. 1953, leg. J. G. Chillcott (CNC). CANADA, Manitoba: 3 ♂♂, Fort Churchill, 23. vi. 1952, leg. C. D. Bird (CNC). The very similar Spilogona subfuscisquama and Spilogona pusilla are closely allied to species such as Spilogona humeralis, Spilogona atrisquamula, Spilogona malaisei Ringdahl, 1920 and Spilogona wrangeli Hennig, 1959 by their small size (3 – 4 mm), subovate abdomen, brown or blackish thorax without stripes, anepisternum without interspatial setae, scutellum with downwardly-directed preapical setulae on upper border of declivities, and mid tibia without v setae. Males of these species can be separated by the following couplets:	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDCFF1678EF998AFC70FC00.taxon	distribution	Distribution. PALAEARCTIC: Sweden. NEARCTIC: NWT, Manitoba.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDAFF1778EF9FFFFBD5FE4B.taxon	description	Figs 7 A – H Notes. In Sorokina & Michelsen (2014) Spilogona tendipes was recorded for the first time from Wrangel Island and from NE Greenland from Zackenberg, all based on females. However, a few doubts were expressed about the assignment of these females to Spilogona tendipes: (1) the type locality lies in the warmer maritime climatic zone on the south coast of Alaska; (2) Huckett (1932, 1965) emphasized the presence of abundant setulae on the declivities of the scutellum in the male holotype, but these declivities are practically bare in these females. Later, male and female specimens similar to Spilogona tendipes from Wrangel Island were found in Gorodkov’s collections in the ZISP, and additional material of the same species has been collected on Wrangel Island. Further material similar to Spilogona tendipes from the Magadan region and Altai Mts of Russia was also collected recently. The good condition of these flies and the presence of males made it possible to study more carefully all the characters of the collected specimens. Specimens from the Magadan region and Altai Mts agreed fully with the description of Spilogona tendipes; these localities are not further north than the type locality of Spilogona tendipes. Specimens from Wrangel Island are very similar to Spilogona tendipes, but there are not only some morphological differences between these species, including the genitalia, but they are also genetically distinct. The specimens from Wrangel Island, including the females listed in Sorokina & Michelsen (2014), thus proved to be a species new for science, Spilogona latizygoma sp. nov., described above. Spilogona tendipes and Spilogona latizygoma sp. nov. can be separated as in following couple: - Mid tibia without v setae; hind femur with distinct long pv in basal half; all femora with numerous hair-like av setae in basal half; scutum with long ground-setulae; sternites 3 – 5 with long setae (Fig. 3 A); eye with inconspicuous hairs; male terminalia as in Fig. 3 G, H; female hypoproct with weak individual spinules (Fig. 3 F) ...................... S. latizygoma sp. nov. - Mid tibia with a short v seta; hind femur without distinct long pv in basal half; all femora without numerous hair-like av setae in basal half; scutum with short ground-setulae; sternites 3 – 5 with short setae (Fig. 7 B); eye with distinct hairs; male terminalia as in Fig. 7 F, G; female hypoproct with numerous spinules (Fig. 7 E) ..................................... S. tendipes	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDAFF1778EF9FFFFBD5FE4B.taxon	materials_examined	Material examined. RUSSIA, Magadan region: 1 ♂ 2 ♀, Yablonevyi Pass, 120 km NNE Magadan, 900 m, 60 ° 59 ’ N 151 ° 53 Е, 17. vii. 2014, leg. N. Vikhrev (1 ♀ (BUIC-DIP 1759) in SZMN, 1 ♀ 1 ♂ in ZMUM); 1 ♀ 1 ♂, Yablonevyi Pass, 120 km NNE Magadan, 783 м, 60 ° 35 ’ N 151 ° 32 Е, yellow pan trap, 11. vii. 2017, leg. V. Sorokina (BUIC-DIP 1758, SZMN). Altai Republic: 1 ♂, Kosh-Agach district, Akbul River, on stones near the water, 2075 m, 49 º 39 ’ N 88 º 1 ’ Е, 12. vii. 2009, leg. V. Sorokina (SZMN). CANADA, Yukon: 1 ♀, Richardson Mts, 67 º 58 ’ N 136 º 29 ’ W, 1 – 5. vii. 1987, leg. M. Polak & M. Wood (SZMN).	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDAFF1778EF9FFFFBD5FE4B.taxon	distribution	Distribution. PALAEARCTIC:? Greenland (NE), Russia (Magadan region, Altay). NEARCTIC: Alaska, Yukon. DNA barcode. BOLD BIN: BOLD: ADZ 7217. See Table 1 for GenBank accession numbers.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFDAFF1778EF9FFFFBD5FE4B.taxon	discussion	Remarks. Spilogona tendipes is morphologically very similar to Spilogona latizygoma. But based on DNA barcodes, these species are genetically different; the p-distance between them is 3.36 %.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFD8FF1478EF9C83FABCFAB9.taxon	description	Figs 6 E, F Spilogona wrangeli Hennig, 1959: 360. Type-locality: “ O-w Wrangelja, werch. r. Klen k SSW ot pika Berri, 19. – 21. VIII. 38 g. Gekker ” [RUSSIA, Far East, Wrangelya I., upper Klen river SSW of Mt. Berry] [seen].	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFD8FF1478EF9C83FABCFAB9.taxon	description	Notes. The holotypes of Spilogona coactilis (in Canadian National Collection) and Spilogona wrangeli (in ZISP) were examined. Both species had been described from arctic Islands, Wrangel Island and Herschel Island, and had not since been found in other localities. Spilogona coactilis is known only from the holotype and one additional male. A series of Spilogona wrangeli has been found recently on Wrangel Island (Sorokina & Thidrikh, 2021). The descriptions and the male terminalia are the same for both species. The exception was a v seta on the mid tibia, which Huckett described for Spilogona coactilis; Spilogona wrangeli is without a v seta on the mid tibia. I examined the holotype of Spilogona coactilis. The specimen is a little crumpled, legs pressed against the thorax, one mid tibia in glue; with difficulty I was able to see that the mid tibia is in fact without v setae. Males of these species are small in size (3.5 – 4 mm), facial edge often a little projecting beyond level of profrons, but sometimes not, subovate abdomen, blackish thorax without stripes, anepisternum without interspatial setae, scutellum with downwardly-directed preapical setulae on upper border of declivities, costa with spinules, mid tibia without v setae, hind femur with weak pv setae, and abdomen dark with indistinct black expansive marks. I therefore conclude that Spilogona coactilis Huckett, 1965 is a new junior synonym of Spilogona wrangeli Hennig, 1959. The female of both Spilogona coactilis and Spilogona wrangeli has been not described. It is very similar to Spilogona malaisei, like the male, and both can be separated as in following couplet:	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFD8FF1478EF9C83FABCFAB9.taxon	distribution	Distribution. PALAEARCTIC: Russia (Wrangel Island). NEARCTIC: Yukon (Herschel Island). DNA barcode. BOLD BIN: BOLD: AED 9512. See Table 1 for GenBank accession numbers.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
03FA87F7FFD8FF1478EF9C83FABCFAB9.taxon	discussion	Remarks. Spilogona wrangeli is morphologically very similar to Spilogona malaisei, especially females. But based on DNA barcodes, these species are genetically different; the p-distance between them is 2.04 – 2.15 %.	en	Sorokina, Vera S. (2025): New taxonomic notes on the genus Spilogona Schnabl, 1911 (Diptera: Muscidae) in Arctic Russia, with the description of three new species. Zootaxa 5584 (1): 1-25, DOI: 10.11646/zootaxa.5584.1.1, URL: https://doi.org/10.11646/zootaxa.5584.1.1
