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 from the latter mainly by the 5-segmented maxillary palps with the preapical segment subequal in length to the apical one, and by the shorter first funicular segment. Fossil F. luteola Presl, 1822, F. trigona Presl, 1822, F. macrognatha Presl, 1822 and F. quadrata Holl, 1829 are considered incertae sedis in Formicidae. Thus, ten valid Formica Linnaeus, 1758 species (including F. ribbeckei) are known now from late Eocene European ambers. The diversity of Formica in the early and middle Eocene deposits of Eurasia and North America is considered. It is assumed that the genus Formica most likely arose in the early Eocene.

中文翻译：

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晚始新世罗夫诺琥珀中的福美ica科物种（膜翅目、,科、,科）

一个新种，Formica ribbeckei Radchenko＆Perkovsky，sp.。nov。，是根据始于始新世晚期Rovno琥珀（乌克兰）的四名工人描述的。它与F. flori Mayr（1868）极为相似，但与后者的区别主要在于5节段上颌触诊，其前节段的长度与顶端的长度相等，而第一节节段的长度较短。化石F. luteola Presl，1822年，F. trigona Presl，1822年，F. macrognatha Presl，1822年，F. quadrata Holl，1829年被认为是甲虫。因此，现在从始新世晚期的欧洲琥珀中已知十种有效的福米卡林奈氏菌，包括1758个种（包括罗伯氏乳杆菌）。考虑了欧亚大陆和北美始新世中期和中新世沉积层中的胶树多样性。据推测，Formica属最有可能出现在始新世早期。