Two New Aphaenogaster Species (Hymenoptera, Formicidae) from Baltic Amber

Aphaenogaster groehni Radchenko, sp. n. and A. ribbeckei Radchenko, sp. n., are described from the Late Eocene Baltic amber, each based on the holotype worker. Aphaenogaster groehni Radchenko, sp. n. differs from previously described species from the Late Eocene European ambers by a distinctly narrowed posteriorly head without pronounced occipital corners and a longer antennal scape, and A. ribbeckei Radchenko, sp. n. differs by a more slender mesosoma. The taxonomic position of the new species is discussed.