†Myrmica electrina Radchenko, 2023c: 639, fig. 3C-E, tables 1, 2 (w.) UKRAINE (Rovno Amber, Eocene), POLAND (Baltic Amber, Eocene).

Primary type information: Primary type material: holotype worker. Primary type locality: Ukraine: Rivne Prov., Rovno amber, late Eocene, Priabonian age, 37.8-33.9 Ma. Primary type depository: SIZK. Primary type specimen: CASENT0917544, No. K-7581. Secondary type information: Secondary type material: 1 paratype worker. Secondary type locality: Poland: Baltic amber, late Eocene, Priabonian age, 37.8-33.9 Ma. Secondary type depository: CJDL. Secondary type specimen: No. JDC 5627.