• As unavailable (infrasubspecific) name: Emery, 1924f: 346; Smith, 1951c: 831.
• Declared as unavailable (infrasubspecific) name: Bolton, 1995b: 420.
• Material referred to Trachymyrmex septentrionalis obscurior by Creighton, 1950a: 324; Smith, 1958c: 137.
• Material referred to Trachymyrmex septentrionalis by Weber, 1958b: 53.

Obsolete combinations

• Atta septentrionalis obscurior crystallina

Citations

• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Creighton, W. S. 1950a. The ants of North America. Bulletin of the Museum of Comparative Zoology 104:1-585. PDF
• Emery, C. 1924f ("1922"). Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [concl.]. Genera Insectorum 174C:207-397. PDF
• Smith, M. R. 1951c. Family Formicidae. Pp. 778-875 in: Muesebeck, C. F. W.; Krombein, K. V.; Townes, H. K. (eds.) 1951. Hymenoptera of America north of Mexico. Synoptic catalogue. United States Department of Agriculture. Agriculture Monograph 2:1-1420. PDF
• Smith, M. R. 1958c. Family Formicidae. Pp. 108-162 in: Krombein, K. V. (ed.) 1958. Hymenoptera of America north of Mexico. Synoptic catalogue. First supplement. United States Department of Agriculture. Agriculture Monograph 2(suppl. 1):1-305. PDF
• Weber, N. A. 1958b. Nomenclatural changes in Trachymyrmex (Hym.: Formicidae). Entomological News 69:49-55. PDF
• Wheeler, W. M. 1911i. Descriptions of some new fungus-growing ants from Texas, with Mr. C. G. Hartman's observations on their habits. Journal of the New York Entomological Society 19:245-255. PDF