Nesomyrmex medusus Csősz & Fisher, 2015: 51, figs. 25-27 (w.q.m.) MADAGASCAR. Malagasy.

Primary type information: Type-material: holotype worker. Type-locality: Madagascar: Prov. Toliara, Parc Nat. de Tsimanampetsotsa, Mitoho Cave, 6.4 km. 77° ENE Efoetse, 17.4 km. 170° S Beheloka, 24°03’S, 43°46’E [-24.04722 N, 43.75317 E], 65 m., 18-22.iii.2002, BLF06201 (Fisher, et al.). Type-depository: CASC. Type-specimen: CASENT0455428. Secondary type information: Paratype-material: 10 paratype workers, 1 paratype queen, 2 paratype males. Paratype-locality: same as for holotype. Paratype-depository: CASC.