Dolichoderus pinguis, 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 : 134-135

Genus Dolichoderus Lund, 1831

Type species Formica attelaboides Lund, 1831 , by monotypy.

Diagnosis (for fossil imprints). Waist consisting of 1 segment (petiole); gaster without constriction between 1st and 2nd gastral (abdominal III and IV) segments. Head elliptical or oval, widest behind midlength of head sides; sometimes retort-shaped or subrectangular with rounded occipital corners, but never rectangular and longer than wide as in Protazteca Carpenter, 1930 . Eyes of moderate size. Antennae of gynes and workers 12-segmented; antennae of males 13-segmented, with very short scape.

Mandibles triangular, dentate. Propodeum bispinate, bidentate, or distinctly angular in side view, always with concave declivity. Petiole of various form. Forewing with cells 1+2r, 3r, rm and mcu closed; rm usually triangular. Cell 3r touching wing margin. Icu> 1.45. Integument thick, often coarsely sculptured. Male genitalia small, not permanently external.

Species included. The genus Dolichoderus comprises 132species and 20subspecies in the modern fauna [ Bolton, 2015]. The vast majority of them are distributed in the Neotropical, Indo-Australian, and Australian Regions. Only 9species are known from the Oriental Region, 4from the Nearctic Region and 2 from the Palearctic Region, and none have been recorded from the Afrotropical Region. A total of 47 extinct species have been described. The oldest species D.kohlsi Dlussky et Rasnitsyn, 2002 is recorded from the Middle Eocene Green River Formation, USA [ Dlussky, Rasnitsyn, 2003]. Nearly half of the fossil species (24) have been described from Late Eocene European ambers [ Dlussky, 2002, 2008].