Cataulacus difficilis Santschi

Type location Benin (Cataulacus pygmaeus stirps difficilis, Santschi, 1916b: 506, worker; raised to species status by Bolton, 1974a) collected from Dahomey, Desanti; known solely from holotype worker .

Santschi's (1916b) description is at . Bolton's modern description (1974a) is at

WORKER - TL 3.3 mm; separated from Cataulacus taylori by dull appearance and weaker rugae on dorsum; strong mesokatepisternal tooth.