Monomorium (Monomorium) estherae Weber, 1943d: 361, pl. 15, fig. 18 (w.) SOUTH SUDAN. Afrotropic.

Primary type information: Type-material: lectotype worker (by designation of Heterick, 2006: 128). Type-locality: lectotype South Sudan (“Anglo-Egyptian Sudan”): Imatong Mts, W slopes, ca 5050 ft, 4.viii.1939, no. 1423 (N.A. Weber). Type-depository: MCZC. Secondary type information: Paratype-material: 1 paralectotype worker. Paratype-locality: same as for lectotype. Type notes: Heterick, 2006: 128, writes 24.vii.-5.viii.1943, no. 1423, for the type-material, but Weber’s introduction (p.264) indicates that collecting took place in 1939, with the date 4.viii., no.1423 on p. 362, where 3 syntypes are mentioned.