Dalla Torre, 1893: 163; Emery, 1913a: 29; Kempf, 1972b: 29; Brandão, 1991: 329; Shattuck, 1994: 10; Bolton, 1995b: 78.
Emery, 1893l: 127 (all species key); Emery, 1913a: 29 (diagnosis); Longino, 1989b: 1 (Azteca alfari group on Cecropia); Longino, 1991a: 1571 (Cecropia-inhabiting species key); Shattuck, 1992c: 49 (diagnosis, review of genus); Bolton, 1995a: 1048 (census); Longino, 1996: 131 (Costa Rica stem-inhabiting species key); Longino, 2007: 10, 55 (Costa Rica species keys, Azteca aurita group keys); Guerrero et al., 2010: 53 (Azteca aurita group key); Baccaro et al., 2015: 130 (genus in Brazil); Cantone, 2017: 112 (brief male diagnosis); Guerrero, 2019: 704 (Colombia species key).
Extant: 84 valid species (13 synonyms), 29 valid subspecies (35 synonyms, 1 homonym, 1 unavailable, 20 obsolete combinations)
Fossil: 2 valid species