Scathophaga nigripalpis ( Becker, 1907 )

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 : 231-232

Scathophaga nigripalpis ( Becker, 1907)

Figs 5 , 33, 100–102, 135.

nigripalpis Becker, 1907: 413 ( Scatophaga ). Type-locality: Ost-Grönland.

orbitalis Becker, 1915: 65 ( Scopeuma ). Type-locality: “Pemal” [hilly area between the northernmost parts of the Polar Urals and the Arctic sea coast] ( Russia).

REMARK. This species was recorded in Russia for arctic zone of European part (e.g., Yugorsky Peninsula, Novaya Zemlya) and Siberia [ Becker, 1915: 65; Gorodkov, 1970: 451, 1989: 33; Engelmark, 1999: 158, 159], from Yakutia [ Bagachanova et al. 2016: 782] and Chukotka [ Ozerov, Krivosheina, 2014: 218].

MATERIAL EXAMINED. Chukotka: Shmidt (68.892ºN 179.409ºW), 17.VII.1963, Gorodkov (1 ♂, 3 ♀♀, ZISP) ; Anadyr’ (64.731ºN 177.504ºE), 13.VIII.1966, Gorodkov (25 ♂♂, 16 ♀♀, ZISP) ; Apapel’khin (ca. 69.764ºN 170.617ºE), 21. VI.1963, Gorodkov (6 ♂♂, 4 ♀♀, ZISP) ; Ugol’nyy env. (64.733ºN 177.733ºE), 12.VIII.1966, Gorodkov (2 ♂♂, 2 ♀♀, ZISP) ; Ureliki (64.400ºN 173.214ºW), 3–6.VIII.1963, Gorodkov (4 ♀♀, ZISP) ; Yakutia: airport Saskylakh (71.934ºN 114.083ºE), 24.VII. and 9.VIII.1988, Gorodkov (6 ♂♂, 14 ♀♀, ZISP) ; Anabarsky Bay (ca. 73.502ºN 113.551ºE), 25 and 30. VI.1959 (3 ♂♂, ZMUM) ; Anabarsky Bay, Cape Khorgo (73.504ºN 113.525ºE), 24–25.VII.1959, Chernov (3 ♂♂, ZISP) ; Chekurovka (71.046ºN 127.526ºE), 24.VII.1957, Gorodkov (1 ♂, ZISP) ; Chokurdakh (70.618ºN 147.895ºE), 19– 20.VIII.1971 and 7.VIII.1972, Gorodkov (20 ♂♂, 18 ♀♀, ZISP) ; Kular (70.573ºN 134.271ºE), 3.VIII.1974, Gorodkov (1 ♀, ZISP) ; Tiksi env. (71.635ºN 128.857ºE), 2–17.VIII.1957, Gorodkov (28 ♂♂, 23 ♀♀, ZISP) ; Uryung-Khaya (72.812ºN 113.231ºE), 26.VII. and 7–8.VIII.1988, Gorodkov (6 ♂♂, 5 ♀♀, ZISP) ; Kular (70.573ºN 134.271ºE), 3–4.VIII.1974, Gorodkov (10 ♂♂, 8 ♀♀, ZISP) ; Nizhneyansk (71.441ºN 136.135ºE), 31.VII.1974, Gorodkov (3 ♂♂, 3 ♀♀, ZISP) . See also Ozerov & Krivosheina [2014: 218] .

DESCRIPTION. Male. Female. Body-length 5.1– 5.9 mm.

Head. Frontal vitta yellow completely or blackish, but yellow in apical third or quarter, with delicate whitish reflection; fronto-orbital plate black, densely greyish dusted. Face, parafacial and gena yellow, with whitish reflection. Postcranium blackish. 4–6 frontals, 3 orbitals and additionally numerous setulae along margin of eye present ( Fig.5 ). Antenna black; postpedicel about twice as long as wide. Arista bare. Palpus black ( Fig.5 ).

Thorax black, greyish dusted, with dark stripes and fuzzy spots on scutum and scutellum. Acrostichals not differentiated from the other hairs on scutum, dorsocentrals 2+(2–3), intra-alars 1+0, supra-alars 1+2, postpronotals 2. Anepimeron with several hairs. Scutellum greyish dusted, with a pair of strong basal scutellar and a pair of strong apical scutellar setae.

Legs. Coxae and femora of all legs black, greyish dusted. Tibiae and tarsi of all legs from yellow completely to black completely. Fore femur covered with long hairs, with 3–4 dorsal setae or setulae in apical third (female) or without conspicuous setae (male). Fore tibia with 2–4 dorsal, 2–4 posterodorsal, 1–2 posterior, 1 preapical dorsal, 1 preapical anterodorsal, and 1 posterior apical setae. Mid femur without conspicuous setae. Mid tibia with 1–2 anterodorsal, 1–3 posterodorsal, 0–1 anteroventral, 0–2 posterior setae, also with a ring of apicals. Hind femur with a row of anterodorsal setae. Hind tibia with 2–3 posterodorsal, 2–3 anterodorsal, 0– 2 anteroventral, 1 preapical dorsal, 1 preapical anterodorsal and 1 apical anteroventral setae.

Wing clear; crossveins r-m and d-m not darkened.

Abdomen black, densely pale grey dusted, covered with whitish hairs; female tergites 2–6 each with a row of marginal setae. Male sternite 4 about 2 times as long as wide (Fig. 33). Male sternite 5 with moderately wide lateral lobes ( Fig. 100 ). Cercal plate as long as surstyli ( Figs 101, 102 ). Aedeagus as in Fig.135 .

DISTRIBUTION. Russia: north from Polar Ural to Chukotka. — North America.

Figures

Figs 3–5. Scathophaga furcata (Say) (3), S. taeniopa (Rondani) (4) and S. nigripalpis (Becker) (5): 3 — female adult (Photograph by D.I. Gavryushin); 4, 5 — head. Рис. 3–5. Scathophaga furcata (Say) (3), S. taeniopa (Rondani) (4) and S. nigripalpis (Becker) (5): 1 — самка (Фото Д.И. ГаврюШина); 4, 5 — голова.

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.

Figs 130–137. Aedeagus of Scathophaga spp., lateral view: 130 — S. buryatica Ozerov et Krivosheina; 131 — S. decipiens (Haliday); 132 — S. incompleta Ozerov et Krivosheina; 133 — S. lapponica (Ringdahl); 134 — S. mollis (Becker); 135 — S. nigripalpis (Becker); 136 — S. obscura (Fallén); 137 — S. tinctinervis (Becker). 130 — after Ozerov & Krivosheina, 2019, fig. 2; 131, 132 — after Ozerov & Krivosheina, 2020, figs 5, 11. Рис. 130–137. Эдеагус Scathophaga spp., сбоку: 130 — S. buryatica Ozerov et Krivosheina; 131 — S. decipiens (Haliday); 132 — S. incompleta Ozerov et Krivosheina; 133 — S. lapponica (Ringdahl); 134 — S. mollis (Becker); 135 — S. nigripalpis (Becker); 136 — S. obscura (Fallén); 137 — S. tinctinervis (Becker). 130 — по Ozerov & Krivosheina, 2019, fig. 2; 131, 132 — по Ozerov & Krivosheina, 2020, figs 5, 11.