Dalla Torre, 1893: 72; Wheeler, 1922: 891; Emery, 1924f: 270; Bolton, 1995b: 294; Fisher & Bolton, 2016: 340 (checklist).
Emery, 1892: 116 (all species key); Arnold, 1916: 194 (diagnosis, South Africa species key); Emery, 1924f: 270 (diagnosis); Bolton, 1981b: 260 (diagnosis, all species revision, key); Bolton & Marsh, 1989: 1277 (diagnosis, all species, revised key); Bolton, 1995a: 1051 (census); Fisher & Bolton, 2016: 340 (diagnosis); Cantone, 2017: 222 (brief male diagnosis).
Extant: 34 valid species (2 synonyms, 3 unavailable), 0 valid subspecies (4 synonyms, 10 obsolete combinations)