†Liometopum greenwalti LaPolla, 2023: 388, figs. 2, 6 (aq.) U.S.A. (Montana, Canyon Ferry Reservoir, Oligocene).

Primary type information: Primary type material: holotype queen. Primary type locality: U.S.A.: Montana, Canyon Ferry Reservoir; Lower Oligocene (Rupelian, ca. 32.0 ± 0.1 Ma). Primary type depository: MOR. Primary type specimen: MOR-IV-1465. Secondary type information: Secondary type material: 3 paratype queens. Secondary type locality: same as for holotype. Secondary type depository: MOR. Secondary type specimens: MOR-IV-1047, MOR-IV-1107, MOR-IV-1156.