Corynoptera subparvula Tuomikoski, 1960

Babytskiy, A. I., Zuieva, O. A., Bezsmertna, O. O. & Dudiak, I. D., 2019, The First Records Of Corynoptera Species (Diptera, Sciaridae) From Ukraine, Vestnik Zoologii 53 (3), pp. 227-236 : 231-233

Corynoptera subparvula Tuomikoski, 1960 ( figs 17–24 )

M a t e r i a l e x a m i n e d. Ukraine, Volyn Region,outskirts of Solovychi village : 51.06260 N 024.48169 E,altitude ca. 180 m, dry meadow with pine planting, with exhauster, 8.08.2015, 1 Ơ, leg. A. Babytskiy (No 147, UkrBIN-795848) ; Ukraine, Ternopil Region, outskirts of Pachorna village, left bank of Dniester River , NNP “Dnistrovskyi kanion”: 48.66650 N 025.67790 E, altitude ca. 140 m, coastal willow overgrowth, sweeping, 31.07.2017, 1 Ơ, leg. A. Babytskiy (No 254, UkrBIN-795947) ; Ukraine, Odesa Region, outskirts of Lebedivka village, the bank of Burnas estuary, NNP “Tuzlovski lymany”: 45.8411667 N, 030.1398333 E, altitude ca 10 m, honeylocust-robinia forest with oak admixture, above fruit body of Agaricus sp. , sweeping, 20.07.2017, 1 Ơ, leg. A. Babytskiy (No 289) .

D i s t r i b u t i o n: Austria, Britain Is., Bulgaria, Canada (Ontario), Canary Is., Czech Republic, Danish mainland, Finland, Germany, Greek mainland, Italian mainland, Kazakhstan, Romania, Russia (Altay region, Karelia and Tuva), Spanish mainland, Sweden, The Netherlands ( Hippa & Vilkamaa, 1994; Komarova, 2003; Sataeva, 2006; Menzel & Heller, 2013), Turkmenistan ( Gerbachevskaja-Pavluchenko, 1986), Ukraine (first record).

Diagnosis. Male imagoes reach 1.40 mm in length. Eye bridge consists of 2–3 rows of ommatidia ( fig. 24 ). Maxillary palpus is bright yellowish brown, short, consists of 3 segments; basal palpomere with 1 setae and bordered sensory pit ( fig. 22 ). Length/width of 4th flagellomere is 1.50–2.50 ( fig. 20 ). Thorax is brownish, body bristles are bright yellowish ( fig. 17 ). Legs are bright. Tibial organ t 1 is unbordered, with unarranged patch of setae ( fig. 21 ). Length of spur/width of tibia: leg 1 = 1.40–1.50, leg 2 = 1.70–1.80; leg 3 = 1.70–1.90. Length of metatarsus/length of tibia: leg 1 = 0.45–0.50, leg 2 = 0.40–0.45; leg 3 = 0.45–0.50. Length of tibia 3/length of thorax 1.15–1.25. Wing length is 1.1–1.3 mm; width/ length of wing 0.40–0.45; c/w = 0.60–0.75; r 1 /r = 0.60–0.75; y bare ( fig. 23 ). Helter with a light stalk ( fig. 17 ). Gonostylus with 5 megasetae — 3 apical, 1 mesial and 1 basal ( figs 18– 19 ). Two upper apical megaesetae located close each other, directed horizontal; lower apical megaeseta with socket, more basal than two upper. Basal megaseta arising from a very large, lobe-like basal body. Inner part of gonostylus is concave. Dorsal side of gonostylus is wing-like extended ( Tuomikoski, 1960; Gerbachevskaja, 1969; Hippa & Vilkamaa, 1994).

Corynoptera subparvula resembles C. obscuripila Tuomikoski, 1960 , C. parvula ( Winnertz, 1867) , C. cruciata ( Hippa & Vilkamaa, 1994) and C. unidentata ( Hippa & Vilkamaa, 1994) . From the first three it differs by lacking one or two other (except apical) closely associated megasetae, and from all by its having a mesial megaseta located at the middle of the ventral mesial margin of the gonostylus ( Hippa & Vilkamaa, 1994).

Note. Vein y bare, r 1 with 4–5 macrotrichia ( fig. 25 ). Biometric indexes of studied specimens: wing length — 1.18–1.33 mm, wing width — 0.49–0.50 mm; width/length of wing 0.37–0.42; stM/M-fork = 1.05–1.33; r 1 /r = 0.55–0.72; x/y = 0.60–1.08; stCu/x = 0.21– 0.33 (sometimes stCu is indistinct); c/w = 0.61–0.64. Length of spur/width of tibia: leg 1 = 1.19–1.37, leg 2 = 1.43–1.72; leg 3 = 1.46–1.60. Length of metatarsus/length of tibia: leg 1 = 0.46–0.48, leg 2 = 0.41–0.43, leg 3 = 0.44–0.46. Length of tibia 3/length of thorax 1.16–1.23.

Figures

Figs 17–24. Corynoptera subparvula, male: 17 — thorax; 18 — ventral view of gonostyles; 19 — general view of hypopygium ventral; 20 — the fourth flagellomere; 21 — front tibial (t1) organ; 22 — maxillary palpus; 23 — wing; 24 — eye bridge. Scale bars: 17, 19, 23 — 0.20 mm; 18, 20, 21, 22, 24 — 0.05 mm.

Figs 25–31. Corynoptera concinna, male: 25 — thorax; 26 — ventral view of gonostyles; 27 — general view of hypopygium ventral; 28 — front tibial (t1) organ; 29 — eye bridge; 30 — wing (scale bar — 0.20 mm); 31 — the fourth flagellomere. Scale bars: 25, 27, 30 — 0.20 mm; 26, 28, 29, 31 — 0.05 mm.