Monomorium adiastolon Heterick, 2006: 157, figs. 27, 72 (w.q.) MADAGASCAR. Malagasy.

Primary type information: Type-material: holotype worker. Type-locality: Madagascar: Prov. Antsiranana, R.S. Manongarivo, 17.8 km. 218° SW Antanambao, 14°01’3’’S, 48°25’1’’E, 1580 m., 27.x.1998, #1972(17)-3, beating low vegetation, montane rainforest, BLF01972 (B.L. Fisher). Type-depository: CASC. Type-specimen: CASENT0172864. Secondary type information: Paratype-material: 2 paratype workers, 1 paratype ergatoid queen. Paratype-locality: same as for holotype. Paratype-depositories: BMNH, MCZC.