Biamomyrma rugosa, 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 : 144

Biamomyrma rugosa sp. n.

( Fig. 29)

Material. Holotype PIN 3429/1172 and 1169 (counterprint of the same specimen), gyne.

Description. Gyne. Body length ca.5 mm. Head very big, 0.9 times as long as wide. Antenna 10-segmented. Scape short, nearly half as long as head. Funiculus gradually incrassate towards apex but without differentiated club. 2–5 funicular joints nearly as long as wide. Scutum nearly 3 times as long as scutellum, its dorsum straight in side view. Propodeum weakly convex in side view. Petiole with ventral tooth, sessile, longer then high; its dorsum gradually convex in side view. Postpetiole comparatively small. Gaster oval. Pronotum, mesopleura, petiole and postpetiole reticulately rugose , head, scutum and scutellum longitudinally rugose .

Measurements of holotype, mm: AL 1.5; HL 0.9; HW 1; SL0.47; SctL0.8; SctlL0.3; PtL0.42; PptH0.54.

Comparison. Differs from other species in comparatively small postpetiole.

Etymology. Rugosa is the Latin for rugose , wrinkled.