Primary type information: Type-material: lectotype worker (by designation of Heterick, 2006: 101). Type-locality: lectotype Singapore (A.R. Wallace). Type-depository: BMNH. Type-specimen: CASENT0102330. Secondary type information: Paratype-material: 3 paralectotype workers. Paratype-locality: same as for lectotype. Type notes: Syntypes of both Monomorium vastator and Monomorium fragilis bear the same label, “House ants Singapore, very destructive”. Both probably had their origin in a single series, one part of which (Monomorium vastator) went direct to Smith, the other (Monomorium fragilis) which came to him later, via the W.W. Saunders collection.
- Heterick, B. 2006. A revision of the Malagasy ants belonging to genus Monomorium Mayr, 1855 (Hymenoptera: Formicidae). Proceedings of the California Academy of Sciences (4)57:69-202. PDF
- Smith, F. 1858a. Catalogue of hymenopterous insects in the collection of the British Museum. Part VI. Formicidae. London: British Museum, 216 pp. PDF