Rovnoholoneurus miyae Fedotova et Perkovsky, 2017

Fedotova, Z. A. & Perkovsky, E. E., 2017, New Genus And Species Of Gall Midges (Diptera, Cecidomyiidae: Porricondyinae, Holoneurini) From The Late Eocene Amber Of Olevsk (Zhitomir Region, Ukraine), Vestnik Zoologii (Vestn. Zool.) 51 (1), pp. 23-30 : 29

Rovnoholoneurus miyae Fedotova et Perkovsky , sp. n.

urn:lsid:zoobank.org:act:C9136BCD-1536-4214-B583-C21CCF5F4DA9

M a t e r i a l. Holotype. SIZK OL-2 , well preserved inclusion of a female with partly missing tarsi; Olevsk, Rovno amber; Late Eocene .

D e s c r i p t i o n. Female ( fig. 3 , 1 –7, 4, 1–8). Body (with ovipositor) 1.7 times as long as antenna; wing 1.1 times as long as body. Wing 1.8 times as long as antenna. 1st flagellomere 5.0 times as long as wide, 1.2 times as long as 2nd; 5th flagellomere 3.9 times as long as wide, slightly shorter than 1st flagellomere; basal enlargement 2.7 times as long as wide, 0.42 times as long as neck; 10th flagellomere of left antenna 1.2 times as long as 9th, 0.83 times as long as 5th; 10th slightly narrowed to apex, rounded apically; 10th flagellomere of right antenna consisting of two fused segments. Palpi much longer than length or width of head, very narrow, parallel sided; 2nd, 3rd, 4th segments strongly prolonged, their ratio: 1: 2.5: 2.7: 4.3. Wing 2.9 times as long as wide. Vein R 1+2 is 0.48 times as long than wing length. All femora longer than corresponding tibiae. Ovipositor with large round apical plate, directed dorso-caudally, соvered with short setae.

M e a s u r e m e n t s (mm): body length, 1.81; antennal length, 1.08; head length with mouth parts, 0.33; head length without mouth parts, 0.20; head width, 0.15; palpus length, 0.38; thorax length, 0.36; thorax width, 0.45; abdomen length, 1.16; wing length, 1.93; wing width, 0.66; vein R 1+2, 0.88; length of fore leg, 3.53: coxa, 0.12; trochanter, 0.06; femur, 0.85; tibia, 0.82; 1st tarsal segment, 0.07; 2nd, , 0.79; 3rd, 0.44; 4th, 0.28; 5th, 0.10; length of middle: femur, 0.80; tibia; 0.57; 1st tarsal segment, 0.1; length of hind: coxa, 0.1; trochanter, 0.07; femur, 0.92, tibia, 0.47.

E t y m o l o g y. The species is named after Mirabel Khelemskyy, daughter of Gennadiy Khelemskyy for his continuous help with the amber collection of the Schmalhausen Institute of Zoology, National Academy of Sciences of Ukraine.

A key to the species of the genus Rovnoholoneurus gen. n.

1. Male. Wing 3.5 times as long as wide ( fig. 1, 1 ). 5th flagellomere 3.8 times as long as wide ( fig. 1 , 4 ). Fore and hind femora slightly shorter than tibia. Hind femora 0.78 times as long as tibia. Body length 1.43 mm ............................................................................................................................. B. davidi sp. n.

— Female. Wing 2.6 or 2.9 times as long as wide ( fig. 3 , 1 ). 5th flagellomere 3.9–4.9 times as long as wide, fore femora longer than tibia................................................................................................................... 2

2. Wing 2.6 times as long as wide. 5th flagellomere 4.9 times as long as wide. Hind femora 1.4 times as long as tibia. Body length 1.74 mm ..................................................... B. laqueatus (Fedotova) comb. n.

— Wing 2.9 times as long as wide ( fig. 3 , 1 ). 5th flagellomere 3.9 times as long as wide ( fig. 3 , 4 ). Hind femora almost 2.0 times as long as tibia. Body length 1.81 mm ...................................... B. miyae sp. n.

We are grateful to A. P. Vlaskin (SIZK) for cutting and polishing the amber pieces, V. Yu. Nazarenko (SIZK) for photography, A. I. Zaitsev (Moscow Sity Pedagogical University) for valuable comments, and S. Bruce Archibald (Simon Fraser University, Burnaby , Canada), and Pyotr N. Petrov ( Lomonosov Moscow State University , Moscow, Russia) for editing the English of the manuscript.

Figures

Fig. 3. Rovnoholoneurus miyae, female, holotype SIZK, OL-2: 1 — general appearance; 2 — mouth parts and palpi; 3 — flagellomeres 8–10; 4 — flagellomeres 4–6; 5 — scapus, pedicel, flagellomeres 1 and 2; 6 — abdomen distally; 7 — apex of abdomen and ovipositor. Scale bar, 0.1 mm.

Fig. 1. Rovnoholoneurus davidi, male, holotype SIZK, OL-8: 1 — general appearance; 2 — head and antenna; 3 — flagellomeres 10–11; 4, flagellomere 5; 5 — mouth parts and palpi; 6 — the abdomen and part of the thorax with swollen scutellum. Scale bar 0.1 mm.

Fig. 4. Rovnoholoneurus miyae, female, holotype SIZK, OL-2: 1 — head and antenna (×69); 2 — apex of abdomen and ovipositor (×360); 3 — fore tarsi (×39); 4 — general appearance (×30.6); 5 — head, palpi, scapus, pedicel, flagellomeres 1 and 2 (×90); 6 — distal portion of the abdomen (×90); 7 — flagellomeres 8–10 (×180); 8 — flagellomeres 4–6 (×190).