Bradysia microspina Mohrig & Krivosheina, 1989

Babytskiy, A. I., Bezsmertna, O. O., Moroz, M. S., Pavliuk, S. D. & Honcharenko, B. V., 2020, New Records Of Bradysia Species (Diptera, Sciaridae) From Ukraine, Zoodiversity 54 (4), pp. 329-340 : 332-333

Bradysia microspina Mohrig & Krivosheina, 1989 ( figs 9–17 )

M a t e r i a l e x a m i n e d. Ukraine, Poltava Region, Velyki Budyshcha , 49.85513 N, 034.58102 E, ca. 170 m a. s. l., on a bus window, collected with aspirator, 17.09.2015, 1 {, leg. A. Babytskiy (No. 103, UkrBIN-795817) .

D i s t r i b u t i o n: Tajikistan ( Mohrig et al., 1989b), Ukraine (first record).

Diagnosis. Male imagoes reach 2 mm in length. Eye bridge consists of 2–3 rows of ommatidia ( fig. 14 ). The 4 th flagellomere barely twice as long as wide, with a very short neck and short setose (significantly shorter than the flagellomere width, fig. 17 ). Maxillary palp consists of 3 palpomeres. Basal palpomere (p 1) big with clearly deepened sensory pit and 3 setae (one longer and stronger than the others); p 2 and p 3 together slightly longer than p 1 ( fig. 13 ). Thorax, gonocoxite and legs almost the same dark color. Mesonotum quite coarse and dark setose, with very strong lateral and 2 scutellar setae ( fig. 9 ). Wing slightly brown; c longer than a half of w; y shorter than a half of x, with 1–2 macrotrichia; M-fork very short; posterior wing veins indistinct ( fig. 16 ). Hypopygium short, dark and heavily setose ( fig. 10 ). Gonostyli relatively small with weak and dorsal strong setae — claw-like dorsal spines, 7–9 loosely standing coarse subapical setae and 2–3 loosely standing awl shaped setae on the end of the apical third ( fig. 12 ). Tegmen wider than its length, with a large field of multi-tipped teeth (Mohrig et al., 1989).

Bradysia microspina is a small species with very small dorsal spines, which are similar to those of B. nitidicollis (Meigen, 1818) . From B. nitidicollis it differs by the much smaller dorsal spine, pressed setosity of flagellomeres and well distinguished shorter M-fork ( Mohrig et al., 1989 b).

Note. The length of y in the studied specimen exceeds a half of length of x, which does not agree with the original description (see above). Tibial organ of t 1 in present specimen consists of 6 setae in comb-like row ( fig. 11 ). Studied male imago 2.3 mm long, wing 1.8 mm long and 0.7 mm wide, y of one wing with 5 macrotrichia ( fig. 16 ), but the other wing bears only 1 macrotrichia on y (see black arrow on fig. 15 ). Biometric indexes of studied specimen: width/length of wing = 0.41; stM/M-fork = 1.05–1.07; R 1 /R = 0.48–0.55; x/y = 1.41–1.47; stCuA/x = 0.66–0.67; c/w = 0.61–0.62. Length of spur/width of tibia: leg 1 = 1.14–1.22, leg 2 = 1.32–1.36; leg 3 = 1.25–1.38. Length of metatarsus/length of tibia: leg 1 = 0.49–0.50, leg 2 = 0.45–0.49, leg 3 = 0.44–0.46. Length of tibia 3/length of thorax 1.24–1.25.

Figures

Figs 9–17. Bradysia microspina, male: 9 — thorax, lateral view; 10 — hypopygium, ventral view; 11 —anterior apex of fore tibia (t 1) with tibial organ, lateral view; 12 — gonostylus, ventral view; 13 — maxillary palp, lateral view; 14 — eye bridge, frontal view; 15 — 1 distal macrotrichia on y (black arrow shows); 16 — wing, dorsal view; 17 — fourth flagellomere, lateral view. Scale bars: 0.10 mm.