A new extinct ant genus (hymenoptera: formicidae) from baltic amber

A new extinct genus and species from the subfamily Dolichoderinae, Dlusskyus groehni gen. et sp. nov., is described based on the single male from Baltic amber (late Eocene, 37.8-33.9 Ma). It differs from all extant and extinct Dolichoderinae genera in the following combination of features: antennae 13-segmented, scape shorter than the second funicular segment, which is the longest; palp formula 6, 4; clypeus not inserted between frontal carinae, frontal triangle well outlined and separated from clypeus by suture; clypeus with longitudinal median carina, its anterior margin very weakly convex, without medial notch; mandibles crossing when closed, masticatory margin long, with two minute sharp apical and preapical teeth and a row of minute sharp denticles, serrate; scutum without notauli; petiole nodiform, with short peduncle; meso- and metatibiae with large simple spur; pretarsal claws without preapical tooth; posterior margin of pygidium with median tooth; subgenital plate with very shallow median notch; pygostiles present; stipites of genitalia very weakly curved, narrow, with rounded apices, telomeres not strongly elongated; forewings with closed cells 1r+2r, 3r, rm and mcu; jugal lobe absent. The taxonomic position of this genus is discussed.