Smith, 1858a: 57; Mayr, 1863a: 443; Roger, 1863b: 12; Emery & Forel, 1879: 450 (Europe); Cresson, 1887: 255 (U.S.A.); Dalla Torre, 1893: 214; Emery, 1925d: 267; Chapman & Capco, 1951: 203 (Asia); Smith, 1951c: 873 (North America); Smith, 1979: 1466 (North America); Bolton, 1995b: 342.
Latreille, 1818c: 441; Mayr, 1855: 383 (diagnosis); Mayr, 1861: 43 (diagnosis); Mayr, 1865: 8 (diagnosis); Forel, 1878c: 373 (diagnosis); André, 1882c: 162 (Europe & Algeria species); Emery, 1925d: 267 (diagnosis); Buren, 1944a: 310 (U.S.A., Iowa species key); Smith, 1947g: 152 (U.S.A. species key); Creighton, 1950a: 556 (Nearctic species key); Gregg, 1963: 632 (U.S.A., Colorado species key); Wheeler & Wheeler, 1963: 274 (U.S.A., North Dakota species key); Bernard, 1967a: 329 (diagnosis); Wheeler, 1968: 156 (Nearctic species, male genitalia); Wheeler & Wheeler, 1986g: 95 (U.S.A., Nevada species key); Kupyanskaya, 1990a: 207 (Far Eastern Russia species key); Agosti, 1994b: 109 (diagnosis, review of genus); Bolton, 1994: 50 (synoptic classification); Bolton, 1995a: 1052 (census); Kupyanskaya, 1995: 361 (Far Eastern Russia species key); Mackay & Mackay, 2002: 359 (U.S.A., New Mexico species key); Bolton, 2003: 129 (synopsis); Trager, 2013: 501 (all species revision), 506 (diagnosis), 509 (all species key, natural history); Cantone, 2017: 169 (brief male diagnosis); Borowiec & Salata, 2022: 253 (diagnosis).
Extant: 14 valid species
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