Bradysia normalis Frey, 1948

Babytskiy, A. I., Rubanovska, N. V. & Bezsmertna, O. O., 2022, New Records Of Sciarid Species (Diptera, Sciaridae) From Ukraine. Iv, Zoodiversity 56 (6), pp. 435-446 : 439-441

Bradysia normalis Frey, 1948 ( figs 10–14 )

M a t e r i a l e x a m i n e d. Ukraine, Chernihiv Region: between Desna and Yevmynka, swampy valley of Desna River , 50.84802° N, 30.79790° E, ca. 100 m a. s. l., swamp covered by sedges, Caltha palustris L. and scorched branches of willow and amorpha, sweeping, 09.07.2017, 1 Ơ (A. Babytskiy) (No. 258, UkrBIN-795951) .

D i s t r i b u t i o n: Europe: Finland, Germany, Romania, Northern Ireland, Norway

(mainland, Svalbard and Jan Mayen), Russia (North European part), Sweden, Ukraine (first record), United Kingdom. North America: Canada (Ontario, Nova Scotia, Nunavut, Newfoundland, Labrador) ( Gerbachevskaja-Pavluchenko, 1986; Heller, Menzel, 2017; GBIF 2022 c; this study).

Diagnosis. Male 1.3–2.1 mm long. Head. Eye bridge consisting of 2 rows of ommatidia. Face and clypeus pale brown to yellow, with pale setae. Maxillary palpus 3-segmented, all segments equally long. Basal palpal segment with 3 setae, one a little longer than others, and marginated sensory pit, not darker than palpal body. Flagellomeres with dense setosity; setae shorter than width of flagellomeres. The length/ width of 4th flagellomere of the Chernihiv specimen ( fig. 13 ) is 2.75, with a basal node index of 2.23–2.33. Thorax pale brown. Anterior pronotum and prothoracic episternum with a few weak and pale setae. Scutum with weak and pale acrostichal setae and stronger and darker dorsocentral setae. Scutellum with a few weak pale setae. Wing length 1.35– 2.10 mm, width 0.65–0.67 mm, width/length index = 0.34–0.41. Membrane greyish. Anal lobe well-developed; M-fork the same length as stM or a little shorter; stM/M-fork of the Chernihiv specimen = 1.01–1.06; R 1 /R = 0.75–0.79; x approximately equal y, x/y = 0.94–1.30, both bare; stCuA distinct, equal a half of x, stCuA/x = 0.78–0.93; c/w = 0.60– 0.61. Halter pale yellow, with up to 15 black strong setae. Legs. Foreleg pale brown, with darker tarsus and distal half of metatarsus, and dark spur. Tibial organ of p 1 ( fig. 12 ) with dark brown, distinctly recognized comb-like row of 5 bristles. Meso- and hindtibia with two pale brown spurs, paler than spur of p 1. Length of spur/width of tibia: p 1 = 1.43–1.44, p 2 = 1.70–1.72, p 3 = 1.45–1.65. Length of metatarsus/length of tibia: p 1 = 0.53, p 2 = 0.52, p 3 = 0.45–0.46. Hypopygium ( fig. 10 ) pale brown. Intergonocoxal area with thumblike large basal lobe completely covered with setae ( fig. 14 ). Gonocoxite well developed, longer than gonostylus, covered with short and pale setae. Gonostylus ( fig. 11 ) beanshaped, pale brown, with long and narrow dark apical tooth and dense subapical group of lighter setae, shorter than the tooth. Tegmen trapezoid with roundish apex ( Frey, 1948; Tuomikoski, 1960; Freeman, 1983).

Bradysia normalis belongs to the B. lobata group (see B. lobata diagnosis). From the related species of the group B. normalis differs in the structure of the intergonocoxal lobe and pale, marginated sensory pit.

Note. Tuomikoski (1960) noted 3 rows of facets in the eye bridge. The studied specimen with the head seen in frontal view shows only 2 rows of ommatidia.

Figures

Figs 10–14. Bradysia normalis Ơ: 10 — hypopygium, ventral view; 11 — gonostylus, ventral view; 12 — anterior apex of fore tibia (p1) with tibial organ, prolateral view; 13 — fourth flagellomere, lateral view; 14 — basal lobe, ventral view. Scale 0.1 mm.