Nascensluna Fedotova et Perkovsky, 2014

Fedotova, Z. A. & Perkovsky, E. E., 2014, New Gall Midges (Diptera, Cecidomyiidae, Brachineurini, Ledomyiini) From The Late Eocene Rovno Amber, Vestnik Zoologii 48 (1), pp. 35-50 : 42-43

Nascensluna Fedotova et Perkovsky , gen. n.

T y p e s p e c i e s: Nascensluna mellea Fedotova et Perkovsky , sp. n.

D e s c r i p t i o n. Male (fig. 4, 1–4; 8, 5–7). Body very wide and swollen, much longer than antennae and slightly shorter than wings. Body and antennae densely covered by scales. Head laterally almost oval. Eye bridge wide, occiput wide rounded. Antennae are 2+10-segmented, scape is enlarged distally, pedicel is round. All flagellomeres without neck, and slightly rounded laterally. Flagellomeres evenly narrowed and shortened distally. Tenth flagellomere widely rounded apically. Flagellomeres with basal whorl of short setae located in single row and medial whorl of very long setae rarely covering medial part of flagellomere. Sensorial filae of flagellomere are invisible. Wing is wide enlarged and rounded distally, vein R 4+5 is short and straight, almost fused with R 1+2 and C, joins margin of the wing near its middle, Cu is positioned far from margin of wing, without fork. Fore femur and tibia are slightly longer than middle ones and shorter than hind femur and tibia. Hind femur and tibia have equal length. Hind tarsus is 1.6 times as long as femur. Tarsal claw is simple, hook-form. Hind leg is 1.7 times as long as body and 2.1 times as long as wing. Thorax and abdomen are strongly swollen and wide rounded distally. Ovipositor is not protrusible. Cerci are bilobed, very short and narrow.

Рис. 4. Nascensluna mellea, самка, голотип (инв. номер K–1601 коллекции Института зоологии НАН Украины): 1 — общий вид; 2 — 8–10-й членики жгутика; 3 — 5-й членик жгутика; 4 — яйцеклад. Масштабные линейки 0.1 mm.

C o m p a r i s o n. By the shape of the swollen body, 2+10-segmented antennae, covered by dense scales, the new genus is closely related to Brachineura Rondani, 1840 ( Mamaev, 1967; Gagné, Solinas, 1996), differing from it by the wing venation (fused veins R 1+2 and R 4+5), much shorter flagellomeres, longer legs, narrow and short cerci of ovipositor and smaller body size. Wings of new genus are similar to Lasioptera Meigen, 1818 , but new genus differs by short antennae and not protrusible ovipositor.

E t y m o l o g y. Name is based on the Latin Nascens luna (new moon or moonrise). Gender feminine.