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

Primary type information: Primary type material: syntype workers (number not stated). Primary type locality: U.S.A.: Colorado (no further data) (Pergande) (by restriction of Creighton, 1950a: 269). Primary type depositories: AMNH, MSNG. Type notes: Other syntype locality: South Dakota (no further data) (Pergande).