Emery, 1922c: 119; Chapman & Capco, 1951: 173 (Asia); Bolton, 1995b: 394, 424 (Stereomyrmex, Willowsiella).
Bingham, 1903: 218 (diagnosis); Emery, 1922c: 119 (diagnosis); Taylor, 1991a: 294 (Willowsiella discussion); Bolton, 1995a: 1053 (census); Shattuck, 1999: 173 (Australia synopsis); Bolton, 2003: 273 (diagnosis); Cantone, 2017: 238 (brief male diagnosis).
Extant: 3 valid species