Corynoptera hypopygialis ( Lengersdorf, 1926 )

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 : 235

Corynoptera hypopygialis ( Lengersdorf, 1926) ( figs 32–38 )

M a t e r i a l e x a m i n e d. Ukraine, Ternopil Region: outskirts of Luchka village , “Zapust” tract: 49.40437 N 025.61119 E, altitude ca. 330 m, hornbeam-oak forest, sweeping, 7.05.2017, 1 Ơ, leg. A. Babytskiy (No 170, UkrBIN-795868) .

D i s t r i b u t i o n: Albania, Austria, Britain Is., Bulgaria, Czech Republic, Finland, Germany, Greek mainland, Italian mainland, Kazakhstan, Norwegian mainland, Russia (Altay region), Slovakia, Slovenia, Spanish mainland, Sweden, Switzerland ( Sataeva, 2006; Komarov, 2011; Menzel & Heller, 2013), Ukraine (first record).

Diagnosis. Male imagoes reach 1.8–2.2 mm in length. Eye bridge consists of 4 rows of ommatidia. Antennae are dense and long setosed, the bristles are slightly longer than a half of flagellomere width; flagellomere necks are dark. Length/width of 4th flagellomere is 4.0 ( fig. 35 ). Maxillary palpus is short, bright colored, consists of 3 segments. Basal palpomere is a bit high-backed, with 1 long outer setae and indistinct sensory pit. Sensilla are long and curved. Palpomere 2 is the shortest, makes ¾ of basal one. Palpomere 3 approximately as long as basal one. Thorax and abdomen are strong and dark brown colored ( fig. 32 ). Postpronotum is bare; mesonotum with strong and dark setosity. Legs and gonocoxa are lighter than thorax, but noticeably dark. Tibial organ t 1 with indistinct row of bristles ( fig. 36 ). Tarsal claws without teeth. Wings are fumose, posterior veins and membrane without macrotrichia, 2.0– 2.3 mm in length; x is a bit shorter then y, bare or with 1–4 macrotrichia; r 1 = r; r 1 falls into C well before the base of M-fork; stM is longer than Mfork; stCu = ½–¼ x; c/w = 0.67 ( fig. 38 ). Helter is shortened, dark brown colored ( fig. 37 ). Hypopygium is spherical, unicolorous dark brown and concolorous with the abdomen; gonocoxa with very long black bristles on the inner parts, without basal differentiation ( fig. 34 ). Gonostulus is bubble-thick, evenly rounded on the outside ( fig. 33 ). The apex of gonostulus is tight and short setosed, with apical tooth and 4 megasetae (located per two pairs on the noticeable socket). Genital plate (tegmen) is larger in width than in height. Aedeagal teeth are small, with one-pointed apexes. Aedeagus is short, strong sclerotized ( Lengersdorf, 1926; Frey, 1948; Menzel & Mohrig, 1993).

Note. Vein y with 2 macrotrichia, r 1 with many macrotrichia (15 on the specimen). Biometric indexes of studied specimen: wing length — 2.56 mm, wing width — 1.02 mm; width/length of wing 0.40; r 1 /r = 0.87; x/y = 0.62; stCu/x = 0.66. Length of spur/width of tibia: leg 1 = 1.42. Length of metatarsus/length of tibia: leg 1 = 0.56.

We consider our pleasant obligation to express sincere gratitude to our colleagues and friends, who supported our work, among them, Valery Korneyev (Institute of Zoology of NAS of Ukraine, Kyiv) for his ongoing help, scientific guidance and valuable advice, and Frank Menzel (Senckenberg Deutsches Entomologisches Institut, Müncheberg) for confirmation of identification.Also we are grateful to S. A. Matsiuk for support in processing images and preparation figures. We also thank two anonymous reviewers for their valuable comments.

Figures

Figs 32–38. Corynoptera hypopygialis, male: 32 — thorax; 33 — ventral view of gonostyles; 34 — general view of hypopygium ventral; 35 — the fourth flagellomere; 36 — front tibial (t1) organ; 37 — helter; 38 — wing.