• Cole, 1968: 94 (m.); Wheeler & Wheeler, 1953a: 110 (l.); Taber et al., 1988: 51 (k.); Taber & Francke, 1986: 274 (gynandromorph).
• Combination in Pogonomyrmex: Cresson, 1887: 22.
• Status as species: Mayr, 1886d: 449; Forel, 1886b: xlii; Mayr, 1887: 610 (in key); Cresson, 1887: 260; Dalla Torre, 1893: 119; Emery, 1895d: 310; Forel, 1899a: 119; Wheeler, 1902a: 98 (in key); Wheeler, 1902d: 391 (in key); Wheeler, 1906i: 340; Wheeler, 1910a: 565; Emery, 1921c: 46; Essig, 1926: 862; Olsen, 1934: 507; Cole, 1936a: 36; Cole, 1937b: 135; Cole, 1942: 365; Wheeler & Wheeler, 1944: 238; Buren, 1944a: 283; Creighton, 1950a: 127; Smith, 1951c: 793; Cole, 1954b: 120; Smith, 1958c: 115; Cole, 1966b: 4 (in key); Beck et al., 1967: 72; Smith, 1967a: 351; Cole, 1968: 94 (redescription); Hunt & Snelling, 1975: 21; Yensen et al., 1977: 182; Smith, 1979: 1355; Allred, 1982: 496; MacKay et al., 1985: 50; Wheeler & Wheeler, 1986g: 28; Taber & Francke, 1986: 274; Shattuck, 1987: 172; MacKay et al., 1988: 100; Bolton, 1995b: 341; Taber, 1998: 149 (in key); Mackay & Mackay, 2002: 216; Ward, 2005: 67.
• Senior synonym of Pogonomyrmex opaciceps: Mayr, 1886d: 449; Forel, 1886b: xlii; Dalla Torre, 1893: 119; Emery, 1921c: 46; Creighton, 1950a: 128; Smith, 1951c: 793; Cole, 1968: 94; Smith, 1979: 1355; Bolton, 1995b: 341.
• Senior synonym of Pogonomyrmex occidentalis ruthveni: Olsen, 1934: 507 (in text); Creighton, 1950a: 128; Smith, 1951c: 793; Cole, 1968: 94; Smith, 1979: 1355; Bolton, 1995b: 341.
• Senior synonym of Pogonomyrmex seminigra: Mayr, 1886d: 449; Forel, 1886b: xlii; Dalla Torre, 1893: 119; Emery, 1921c: 46; Creighton, 1950a: 128; Smith, 1951c: 793; Cole, 1968: 94; Smith, 1979: 1355; Bolton, 1995b: 341.
• Senior synonym of Pogonomyrmex occidentalis utahensis: Cole, 1968: 95; Smith, 1979: 1355; Bolton, 1995b: 341.

Junior synonyms

• Pogonomyrmex occidentalis ruthveni Gaige, 1914
• Pogonomyrmex occidentalis utahensis Olsen, 1934
• Pogonomyrmex opaciceps Mayr, 1870
• Pogonomyrmex seminigra (Cresson, 1865)
  Obsolete combination(s): Myrmica seminigra

Obsolete combinations

• Myrmica occidentalis

Citations

• Allred, D. M. 1982. Ants of Utah. Great Basin Naturalist 42:415-511.
• Beck, D. E.; Allred, D. M.; Despain, W. J. 1967. Predaceous-scavenger ants in Utah. Great Basin Naturalist 27:67-78.
• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Buren, W. F. 1944a. A list of Iowa ants. Iowa State College Journal of Science 18:277-312. PDF
• Cole, A. C., Jr. 1936a. An annotated list of the ants of Idaho (Hymenoptera: Formicidae). Canadian Entomologist 68:34-39. PDF
• Cole, A. C., Jr. 1937b. An annotated list of the ants of Arizona (Hym.: Formicidae). [concl.]. Entomological News 48:134-140. PDF
• Cole, A. C., Jr. 1942. The ants of Utah. American Midland Naturalist 28:358-388. PDF
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• Cole, A. C., Jr. 1966b. Ants of the Nevada Test Site. Brigham Young University Science Bulletin. Biological Series 7(3):1-27. PDF
• Cole, A. C., Jr. 1968. Pogonomyrmex harvester ants. A study of the genus in North America. Knoxville, Tenn.: University of Tennessee Press, x + 222 pp.
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• Cresson, E. T. Sr. 1865b. Catalogue of Hymenoptera in the collection of the Entomological Society of Philadelphia, from Colorado Territory. [concl.]. Proceedings of the Entomological Society of Philadelphia 4:426-488. PDF
• Cresson, E. T. Sr. 1887. Synopsis of the families and genera of the Hymenoptera of America, north of Mexico, together with a catalogue of the described species, and bibliography. Transactions of the American Entomological Society, Suppl. Vol. 1887:1-351. PDF
• Dalla Torre, K. W. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. PDF
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