†Leptothorax hystriculus Wheeler, 1915i: 65 (w.) UKRAINE (Rovno Amber, Eocene).

Primary type information: Primary type material: neotype worker (by designation of Radchenko, 2024c: 730). Primary type locality: Ukraine: Rivne Prov., Rovno amber, late Eocene, Priabonian age, 37.8-33.9 Ma. Primary type depository: SIZK. Primary type specimen: CASENT0917539 (K-535). Type notes: Original type material: holotype worker.