Leptothorax (Leptothorax) rugatulus Emery, 1895d: 321 (w.) U.S.A. (Colorado, South Dakota). Nearctic.

Primary type information: Primary type material: syntype workers (number not stated). Primary type localities: U.S.A.: Colorado (no further data) (T. Pergande) (invalid restriction of type locality by Creighton, 1950a: 269; no lectotype designated), South Dakota (no further data) (T. Pergande). Primary type depositories: AMNH, MSNG.