Morphogenus Emplastus Donisthorpe, 1920

Type species Emplastus emeryi Donisthorpe, 1920 (= Dolichoderus britannicus Cockerell, 1915), by original designation.

Diagnosis (for fossil imprints). Gynes and males of fossil ants not preserved well enough to fit orthotaxa, and with following combination of traits: size medium, head subrectangular with rounded occipital corners; mandibles triangular with denticulate masticatory margin; propodeum rounded in side view, petiole in side view with thick scale (gynes) or triangular (males). Forewing with cells1+2r, 3r, rm and mcu closed; cell3r with apex touching wing fore margin, 1RS vertical to R or slightly proclined. Icu> 1.45, Icua> 1.2. Gaster without constriction between 1st and 2nd segments.

Species included. Emplastus britannicus Cockerell, 1915, E. hypolithus Cockerell, 1915, E. gurnetensis Donisthorpe, 1920, and E. kozlovi Dlussky et Perfilieva, 2014 . Bembridge Marls, Isle of Wight, UK; Late Eocene or Early Oligocene [Cockerell, 1915; Donisthorpe, 1920; Antropov et al., 2014].