Temporal range: Priabonian, Late Eocene Rovno amber, Ukraine
Radchenko & Perkovsky, 2021
Maxillary palps 5-segmented, long, reaching occipital foramen, its apical and preapical segments subequal in length; gastral tergites with sparse decumbent pubescence, distance between setae greater than their length; first funicular segment ≤ 1.2 times as long as second one, and ≤ 2.25 times as long as broad.
This taxon was described from Rovno amber (Priabonian, Late Eocene).
The following information is derived from Barry Bolton's Online Catalogue of the Ants of the World.
- †ribbeckei. †Formica ribbeckei Radchenko & Perkovsky, in Radchenko et al., 2021: 240-242, figs. 1-2 (w.) UKRAINE, ROVNO AMBER (Eocene).
- Holotype: worker, SIZK GU–25, Ukraine, Zhitomir Region, Korosten’ District, village Gulyanka, Rovno amber, late Eocene, 33.9–37.8 Ma.
- Paratypes: worker, SIZK K–3566, Ukraine, Rovno Region, Klesov; worker, SIZK K–3514, Ukraine, Rovno Region, Klesov; worker, collection of M. Khomych, No. KH–F–507, Ukraine, Rovno Region, Vladimirets District, vicinity of village Voronky, Rovno amber, late Eocene, 33.9–37.8 Ma.