Mangus magnus Kopylov, sp. nov.

(Fig. 1 A–C)

Etymology. From Latin magnus —giant.

Material. Holotype: PIN 3559 /4458, part and counterpart impressions in marl. Well preserved fore wing. Bon- Tsagan; Mongolia; Lower Cretaceous, Aptian.

Description. Pterostigma, C, R, R1 dark-brown, other veins somewhat lighter, costal area slightly darkened, the rest of the wing membrane transparent, with no color pattern. Sc1 joins C and Sc2 joining R well before R and Rs furcation, pterostigma desclerotized in the apical half; 1-Rs 1.4 × as long as 1-M; Rs+M 0.8 × as long as 2-M; 2-Rs arched apicad, 1.8 × as long as 1r-rs; 2r-rs 1.4 × as long as 1r-rs; 3-Rs strongly arched downward; 4+5-Rs slightly s-shaped, 1.9 × as long as 3-Rs and 2.8 × as long as 6-Rs; 5-M 0.7 × as long as 3r-m; 3r-m curved; 1-Cu as long as 2-Cu; 4-Cu 0.5 × as long as 3+4-M; 2m-cu reclined, arched apicad; 3-A1 3.0 × as long as 2-A1; cell 1r 1.3 × as long as wide, 2r 2.5 × as long as wide.

Measurements: Fore wing length 19.3 mm, width 6.3 mm.

Remarks. With the fore wing 19.3 mm long M. magnus is hitherto the biggest known anaxyelid sawfly.