Scathophaga multisetosa ( Holmgren, 1883 )

Ozerov, A. L. & Krivosheina, M. G., 2021, A review of the genus Scathophaga Meigen, 1803 (Diptera: Scathophagidae) of Russia, Russian Entomological Journal 30 (2), pp. 201-246 : 231

Scathophaga multisetosa ( Holmgren, 1883)

Figs 32, 97–99, 141.

multisetosa Holmgren, 1883: 174 ( Scatomyza ). Type-locality: “Norra Gåskap. Waigatsch” [Cape Severny Gusinyi Nos, Novaya Zemlya, Vaygach Island] ( Russia).

REMARK. This species was recorded in high arctic territory of Russia: Novaya Zemlya, Vaygach I., New Siberian Islands, Taimyr Peninsula [ Holmgren, 1883: 174; Gorodkov, 1986: 33; Ozerov, Barkalov, 2014: 563]. Incorrectly registered from Chukotka by Ozerov & Krivosheina [2014: 218] (see above in S. apicalis ).

MATERIAL EXAMINED. Chukotka: Shmidt (68.892ºN 179.409ºW), 2.VII.1966, Gorodkov (6 ♂♂, 4 ♀♀, ZISP) ; same place, 9–17.VII.1971, Gorodkov (35 ♂♂, 24 ♀♀, ZISP) ; Krasnoyarsk Krai: Dikson I. (73.507ºN 80.334ºE), 9.VII.1961, Yu.I. Chernov (12 ♂♂, 2 ♀♀, ZMUM) ; Taymyr, the lower reaches of the River Lenivaya (74.966ºN 89.916ºE), on flowers of Sieversia glacialis , 4.VII.1980, Yu.I. Chernov (1 ♀, ZMUM) ; Yakutia: Anabarsky Bay, Cape Khorgo (73.502ºN 113.551ºE), 28. VI.1959 (1 ♂, ZMUM) ; Novosibirskie Islands , Kotel’nyy I. (75.338ºN 140.855ºE), 14.VII.1973, Gorodkov (45 ♂♂, 28 ♀♀, ZISP) ; Uryung-Khaya (72.812ºN 113.231ºE), 5.VIII.1988, Gorodkov (1 ♂, ZISP) . See also Ozerov & Barkalov [2014: 563] .

DESCRIPTION. Male. Female. Body-length 7.5– 11.2 mm.

Male thorax, abdomen and legs covered with dense, furry brownish hairs. Female much less hairy, especially abdomen and legs.

Head. Frontal vitta reddish-orange, with delicate whitish reflection; fronto-orbital plate black, greyish dusted. Face, parafacial and gena reddish-orange, with delicate whitish reflection. Postcranium black. 3 orbital and 6–8 frontal setae present. Scapus and pedicel reddish-orange. Postpedicel black, approximately 2 times as long as wide. Arista bare. Palpus yellow.

Thorax black, densely greyish dusted. Acrostichals, postpronotals and intra-alars not differentiated from the other long hairs on scutum, dorsocentrals 0+1, supra-alars (0–1)+(2–3), notopleurals 1–2. Anepimeron bare. Scutellum black, greyish dusted, covered with dense hairs, with pairs of strong basal scutellar, lateral scutellar and apical scutellar setae.

Legs greyish dusted. Coxae black. Femora from yellow completely to blackish. Tibiae and tarsi yellowish. All femora and fore tibia covered with long hairs, but without conspicuous setae, only mid femur with 1 preapical posterior seta. Mid tibia with 2–3 posterodorsal, 2 anterodorsal setae, 1 posterior, 2 anteroventral, 1–2 posteroventral, 1–2 ventral setae and a ring of apicals. Hind tibia with 2–3 anterodorsal, 1 preapical dorsal, 1 apical anterodorsal, 1 apical anteroventral and 1 apical ventral setae; posterodorsal setae often absent in male or, as in female, not strong differentiated from the other long hairs on hind tibia ( Fig. 141 ).

Wing tinged with brownish; crossveins r-m and dm-cu darkened.

Abdomen black, greyish dusted; female tergites 2–6 each with a row of marginal setae. Male sternite 4 approximately as long as wide (Fig. 32), Male sternite 5, epandrium, cercal plate and surstyli as in Figs 97–99 .

DISTRIBUTION. Russia: arctic islands and arctic coast from Taimyr to Chukotka. — North America; a littoral species.

Figures

Figs 138–141. Scathophaga litorea (Fallén) (138), S. karelica Ozerov (139), S. apicalis (Curtis) (140) and S. multisetosa (Holmgren) (141): 138, 139 — end of male abdomen; 140, 141 — hind tibia, dorsal view. 138, 139 — after Ozerov, 2013, figs 11, 12. Рис. 138–141. Scathophaga litorea (Fallén) (138), S. karelica Ozerov (139), S. apicalis (Curtis) (140) и S. multisetosa (Holmgren) (141): 138, 139 — конец брюШка самца; 140, 141 — голень Задней ноги, сверху. 138, 139 — по Ozerov, 2013, figs 11, 12.

Figs 97–105. Scathophaga multisetosa (Holmgren) (97–99), S. nigripalpis (Becker) (100–102) and S. obscura (Fallén) (103–105): 97, 100, 103 — male sternite 5; 98, 101, 104 — epandrium, cercal plate and surstyli, lateral view; 99, 102, 105 — same, dorsal view. Рис. 97–105. Scathophaga multisetosa (Holmgren) (97–99), S. nigripalpis (Becker) (100–102) и S. obscura (Fallén) (103–105): 97, 100, 103 — стернит 5 самца; 98, 101, 104 — Эпандрий, церки и сурстили, сбоку; 99, 102, 105 — то же, сверху.