Emery, 1911e: 35; Kempf, 1972b: 9; Bolton, 1995b: 53.
Mayr, 1887: 540 (diagnosis); Emery, 1911e: 35 (diagnosis); Wheeler, 1923f: 190 (all species key); Brown, 1958g: 188 (review of genus and species); Kugler, 1991: 155 (sting structure); Arias-Penna & Fernández, 2008: 111 (all species key); Boudinot, 2015: 51 (male identification); Baccaro et al., 2015: 194 (genus in Brazil); Cantone, 2017: 175 (brief male diagnosis); Feitosa & Prada-Achiardi, 2019: 675 (Colombia species key); Camacho et al., 2022: 13 (diagnosis).
Extant: 4 valid species (3 synonyms, 7 obsolete combinations), 0 valid subspecies (3 synonyms, 4 obsolete combinations)