Rovnoholoneurus davidi Fedotova et Perkovsky, sp. n.

urn:lsid:zoobank.org:act: 70FAF245-2E6C-4403-81C2-CEB16E6512EF

M a t e r i a l. Holotype. SIZK OL-8, a well-preserved male with partly missing tarsi from Olevsk, Rovno amber; Late Eocene . Syninclusions: SIZK OL-7, Carabidae, Psychodidae; SIZK OL-8, Chironomidae, Tipuloidea, Acari; SIZK OL-9, 2 Sciaridae, Psychodidae, Tipuloidea, Chironomidae (Orthocladiinae) , Cecidomyiidae, Collembola (Symphypleona) , Acari; SIZK OL-10, 2 Trichoptera, 18 Diptera (4 Sciaridae, 11 Chironomidae (Orthocladiinae) , 2 Cecidomyiidae, Nematocera indet.).

D e s c r i p t i o n. Male (fig. 1, 1 –6, 2, 1–11). Body 1.2 times as long as antenna, wing 1.3 times as long as body. Wing 1.5 times as long as antenna. 1st flagellomere 1.3 times as long as 2nd; proximal flagellomeres with long neck, almost as long as basal enlargement; 2nd flagellomere slightly shorter than 1st; distal flagellomeres with short neck; 5th flagellomere 3.8 times as long as wide; 11th flagellomere conical, 1.6 times as long as 10th. Palpi slightly longer than head, very narrow, parallel sided. Wing 3.5 times as long as wide. Vein R 1+2 is 2.2 times shorter than wing. Profemora and metafemora shorter than corresponding tibia; mesofemur longer than mesotibia. Genitalia transverse; gonostylus short, narrow.

M e a s u r e m e n t s (mm): body length, 1.43; antennal length, 1.23; head length with mouth part, 0.31; head length without mouth part, 0.26; head height, 0.21; thorax length, 0.54; thorax width, 0.38; abdomen length, 0.93; wing length, 1.84; wing width, 0.52; vein R 1+2, 0.85; length of fore leg 1.88: coxa, 0.10; trochanter, 0.07; femur, 0.69; tibia, 0.79; fore tarsi, 1.44; length of middle leg: coxa, 0.11; trochanter, 0.07; femur, 0.61; tibia, 0.57; 1st tarsal segment 0.08; 2nd 0.79; 3rd 0.38; 4th 0.16; 5th 0.11; middle tarsi, 1.52 and leg, 2.88; length of hind leg: coxa, 0.10; trochanter, 0.07; femur, 0.52; tibia, 0.66; 1st tarsal segment, 0.11; 2nd 0.67; 3rd 0.33; 4th 0.15; 5th 0.12; hind tarsi, 1.41 and leg, 3.14.

E t y m o l o g y. The species is named after David, the son of the junior author.