| Authorship | Smith, 1858a: 124 | 
|---|---|
| Forms | w. | 
| Bioregion | Indomalaya | 
| Locality | SINGAPORE | 
| Primary type information | Primary type material: lectotype worker (by designation of Heterick, 2006: 101). Primary type locality: lectotype Singapore: (no further data) (A.R. Wallace). Primary type depository: BMNH. Primary type specimen: CASENT0102330. | 
| Secondary type information | Secondary type material: 3 paralectotype workers. Secondary type locality: same as for lectotype. Secondary type depository: BMNH. | 
| Type notes | Syntypes of both Monomorium vastator and Monomorium fragilis bear the same label by A.R. Wallace, “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. | 
| Monomorium fragilis | Species | Synonym junior synonym of current valid taxon Monomorium pharaonis (Linnaeus, 1758) | |
| Myrmica fragilis | Species | Obsolete combination an obsolete combination of Monomorium fragilis (Smith, 1858) | Original combination |