Mayr, 1863a: 408; Roger, 1863b: 36; Dalla Torre, 1893: 1; Emery, 1900e: 185 (species list); Emery, 1910b: 20 (Eciton (Eciton)); Kempf, 1972b: 101; Brandão, 1991: 341; Bolton, 1995b: 184; Borowiec, 2016: 137 (species checklist).
Smith, 1858a: 148 (diagnosis); Mayr, 1865: 17, 77 (diagnosis, all species key); Mayr, 1886b: 115 (all species key); Emery, 1900e: 176 (all species, males key); Emery, 1910b: 17, 19 (diagnosis, subgenera key); Gallardo, 1920: 312 (Argentina species key); Borgmeier, 1955: 162, 175 (diagnosis, all species revision, key); Watkins, 1976: 9 (all species key); Watkins, 1982: 209 (Mexico species key); Billen, 1986b: 170 (Dufour's gland); Bolton, 1995a: 1049 (census); Palacio, 1999: 151 (Colombia species key); Brady et al., 2014: 4 (phylogeny); Baccaro et al., 2015: 156 (genus in Brazil); Borowiec, 2016: 129 (diagnosis); Cantone, 2017: 131 (brief male diagnosis); Palacio, 2019: 599 (Colombia species key).
Extant: 12 valid species, 17 valid subspecies
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