Kempf, 1972b: 230; Bolton, 1995b: 383; Schmidt & Shattuck, 2014: 158 (species checklist).
Wheeler, 1935d: 9 (all species key); Gotwald & Brown, 1967: 275 (diagnosis, all species revision, key); Baroni Urbani, 1975b: 298 (all species key); Bolton, 1995a: 1052 (census); Bolton, 2003: 170 (synopsis); Mackay & Mackay, 2008b: 202 (Colombia species key); Mackay & Mackay, 2008b: 290 (all species revision, key); Schmidt & Shattuck, 2014: 156 (diagnosis, synoptic description, distribution, ecology and behavior, phylogenetic and taxonomic considerations); Baccaro et al., 2015: 338 (genus in Brazil); Fernández & Guerrero, 2019: 545 (Colombia species key).
Extant: 22 valid species