Biamomyrma zherikhini

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

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Biamomyrma zherikhini

sp. n.

Biamomyrma zherikhini  sp. n.

( Fig. 27)

Material. Holotype PIN 3429/108 (print and counterprint), gyne.

Description. Gyne. Body length ca.9 mm. Head 1.1 times as long as wide, with nearly parallel sides, rounded occipital corners and weakly concave occipital margin. Anterior margin of clypeus with rounded lobe. Scape short. Funiculus without clava. Scutum longer than wide, twice as long as scutellum. Propodeum without teeth or spines. Propodeal declivity concave in side view. Form of petiole not visible. Postpetiole massive, shorter than high. Gaster oval. Head, mesosoma, petiole and postpetiole coarsely longitudinally rugose  . Forewing with closed cells 3r, 1+2r, rm and mcu. Cell3r shorted 3.7times as long as wide. The meeting of crossvein rs-m and RS is a little distal to2r-rs. Cell rm triangular with a short stem, twice as long as wide. Cell mcu quadriangular, trapeziform. Section 1M 1.5 times as long as section 1RS. Icu=1.75.

Measurements of holotype, mm: AL 2.6; HL 1.5; HW 1.4; SctL0.87; SctlL0.41; FWL4.5.

Etymology. In honor of the paleoentomologist V.V. Zherikhin who collected ants from Bol’shaya Svetlovodnaya.