Emery, 1922c: 194; Wheeler, 1922: 877; Ettershank, 1966: 98; Bolton, 1995b: 171; Fisher & Bolton, 2016: 263 (checklist).
Arnold, 1916: 240 (diagnosis); Emery, 1922c: 194 (diagnosis); Ettershank, 1966: 98 (diagnosis, review of genus); Bolton, 1987: 278 (diagnosis, revision of genus, species); Bolton, 1995a: 1049 (census); Fisher & Bolton, 2016: 262 (diagnosis).
Extant: 1 valid species (3 obsolete combinations)