Formica species (Hymenoptera, Formicidae, Formicinae) in late Eocene Rovno amber

A new species, Formica ribbeckei Radchenko & Perkovsky, sp. nov. , is described based on four workers from late Eocene Rovno amber (Ukraine). It most resembles F. flori Mayr, 1868 but differs the latter mainly by 5-segmented maxillary palps with preapical segment subequal in length to apical one, and shorter first funicular segment. Fossil luteola Presl, 1822, trigona macrognatha 1822 quadrata Holl, 1829 are considered incertae sedis Formicidae. Thus, ten valid Linnaeus, 1758 species (including ) known now European ambers. The diversity of early middle deposits Eurasia North America considered. assumed that genus likely arose Eocene.