Dalla Torre, 1893: 74; Emery, 1919b: 61; Emery, 1922c: 192; Ettershank, 1966: 107; Kempf, 1972b: 255; Bolton, 1995b: 421.
Emery, 1922c: 192 (diagnosis); Ettershank, 1966: 107 (diagnosis, review of genus); Bolton, 1987: 266 (notes); Bolton, 1995a: 1053 (census); Fernández, 2003h: 646 (all species revision, key); Baccaro et al., 2015: 266 (genus in Brazil); Cantone, 2017: 245 (brief male diagnosis); Fernández & Serna, 2019: 879 (Colombia species key).
Extant: 2 valid species (2 synonyms, 3 obsolete combinations), 0 valid subspecies (3 synonyms, 1 obsolete combination)