Leptothorax schaumii Roger, 1863a: 180 (w.) U.S.A. (Pennsylvania). Nearctic.

Primary type information: Primary type material: syntype workers (number not stated, “a few”). Primary type locality: U.S.A.: Pennsylvania (Schaum). Primary type depository: unknown. Type notes: Mackay, 2000: 404, says no material could be found in MNHU, “probably no longer exist”.