Leptothorax retractus Francoeur, 1986b: 1152, figs. 1-17 (w.q.m.) CANADA (Québec). Nearctic.

Primary type information: Type-material: holotype worker. Type-locality: holotype Canada: Québec, Canton de Rouyn, d.r. de Témiscamingue (no collector’s name). Type-depository: AFPC. Secondary type information: Paratype-material: paratype workers, paratype queens, paratype intercastes, paratype males (numbers not stated). Paratype-locality: same as for holotype. Paratype-depositories: ABPC, AFPC, BMNH, LACM, LPQ, MCZC, MHNG, USNM. Type notes: On p. 1156, Francoeur lists specimens measured: 15 workers, 15 intercastes, 10 queens, 10 males, but does not say if these are totals of specimens, or if all are type-material.