Emery, 1892: 116 (all species key); Arnold, 1916: 194 (diagnosis, South Africa species key); Wheeler, 1922: 891 (catalogue); Emery, 1924f: 270 (diagnosis, catalogue); Bolton, 1981b: 260 (diagnosis, all species revision, key); Bolton & Marsh, 1989: 1267 (diagnosis, revised key); Bolton, 1995a: 1051 (census); Bolton, 1995b: 294 (catalogue); Cantone, 2017: 222 (brief male diagnosis)
Extant: 34 valid species
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