Crematogaster (Oxygyne) butteli Forel, 1913l: 78 (w.q.m.) INDONESIA (Sumatra). Indomalaya.

Primary type information: Primary type material: lectotype worker (by designation of Hosoishi, 2015: 73). Primary type locality: lectotype Indonesia: Sumatra, Soengei Bamban, 9.iv.-14.vi.1912 (H. von Buttel-Reepen). Primary type depository: MHNG. Secondary type information: Secondary type material: 5 paralectotype workers. Secondary type locality: same as for lectotype. Secondary type depositories: MHNG, NHMB. Type notes: Syntype queens and syntype males recorded in the original description are not mentioned by Hosoishi. Under the ICZN Code (Art. 74.1.3) all original syntypes become paralectotypes upon designation of one of their number as lectotype.