Paraneuretus dubovikoffi, Dlussky & Rasnitsyn & Perfilieva, 2015

Dlussky, G. M., Rasnitsyn, A. P. & Perfilieva, K. S., 2015, The Ants (Hymenoptera: Formicidae) of Bol’shaya Svetlovodnaya (Late Eocene of Sikhote-Alin, Russian Far East), Caucasian Entomological Bulletin 11 (1), pp. 131-152 : 134

Paraneuretus dubovikoffi sp.n.

( Figs 2–4)

Material. Holotype PIN 3429/1155, lateral imprint of worker. Paratype: PIN 3429/1145, gyne with forewings. Biamo.

Description. Worker. Body length 6 mm. Head with rounded occipital margin. Eyes comparatively small, oval, situated slightly behind midlength of head; gena nearly 1.5 tines as long as maximum eye diameter. Pronotum convex in side view. Mesopropodeal constriction distinctive. Propodeum rounded in side view. Propodeal dorsum shorter than declivity. Petiole with high node and short peduncle. Gyne. Body length about 17–18 mm. Head wider (without mandibles) than long, narrower at its base than apically, with feebly convex sides. Occipital margin concave, but perhaps it is result of deformation during fossilization. Anterior margin of clypeus stright. Eyes comparatively small, oval, situated on the midlength of head; maximum eye diameter about 0.4 times head length. Mandibles large, triangular, with large apical tooth and numerous denticles on the masticatory margin. Scape protrudes beyond the occipital margin of the head, shorter than head length. Mesosoma wider than head. Scutum shorter than wide, not over-hanging pronotum in dorsal view. Scutellum transverse. Petiole longer than wide, with node and peduncle. Gaster oval.Forewing with usual pterostigma and closed cells1+2r, long 3r, quadriangular rm, pentagonal mcu; 2M and 3M sections almost equal. Transverse veins2r-rs and rs-m are closely disposed, that 4RS is reduced.

Measurements of holotype, mm: AL 1.75; HL 1.1; ED 0.23; PtL0.51. Gyne: AL5.6; HL2.2; HW2.45; ED0.6; SL=2; SctL2.3; SctW2.7; SctL0.9; SctlW2.4; MdL1.2; FWL14.3.

Comparison. Differs worker from P. tornquisti in having body size less (body length of P. tornquisti 8–10mm), less slender habitus and lower propodeum.

Notes. Forewing of gyne has quadriangular rm, that differs the specimen from all known winged aneuretines (both extant and extinct). We describe winged gyne as Aneuretinae due to the following combination of features: long pedunculate petiole with compact body. Because of doubts that two species of Aneuretinae are in the same place, we describe both specimens into one species.

Etymology. After Dmitry A.Dubovikoff who was the first identified worker ant as Aneuretinae.