†Formica ribbeckei Radchenko & Perkovsky, 2021: 240, figs. 1, 2, tabs. 1, 2 (w.) UKRAINE (Rovno Amber, Eocene).

Primary type information: Primary type material: holotype worker. Primary type locality: Ukraine: Zhitomir Region, Korosten’ District, village Gulyanka, Rovno amber, late Eocene, 33.9–37.8 Ma. Primary type depository: SIZK. Primary type specimen: GU–25. Secondary type information: Secondary type material: 3 paratype workers. Secondary type localities: 2 paratype workers Ukraine: Rovno Region, Klesov; 1 paratype worker Ukraine: Rovno Region, Vladimirets District, vicinity of village Voronky, Rovno amber, late Eocene, 33.9–37.8 Ma. Secondary type depositories and specimens: KPCU: No. KH-F-507; SIZK: K-3566, K-3514.