title: Wheeler’s dilemma revisited: first Oecophylla–Lasius syninclusion and other ants syninclusions in the Bitterfeld amber (late Eocene)
abstract: The first syninclusions of extant tropical and Holarctic ant genera are reported from Bitterfeld amber: the tropical Oecophylla F. Smith (O. brischkei Mayr, 1868) with the Holarctic genus Lasius F. (four workers of L. schiefferdeckeri Mayr, 1868), and others. The ratio of tropical and Holarctic ants in Bitterfeld, Baltic, Rovno and Danish ambers is analyzed; Holarctic ants dominate in all ambers, consistent with late Eocene climate. Oecophylla, Lasius and the temperate extant Palaearctic caddisf
journal: Invertzool