• [Justified emendation of spelling to Ectatomma quadridens: Latreille, 1802a: 213.]
• [Junior primary homonym of Cephalotes atratus quadridens De Geer, 1773.]
• Mann, 1916: 405 (m.); Santschi, 1921g: 83 (q.); Wheeler & Wheeler, 1952a: 131 (l.)
• Combination in Ponera: Lepeletier de Saint-Fargeau, 1835: 193.
• Combination in Ectatomma: Mayr, 1862: 732
• Combination in Ectatomma (Ectatomma): Mayr, 1887: 539.
• Status as species: Latreille, 1802a: 213; Fabricius, 1804: 414; Lepeletier de Saint-Fargeau, 1835: 193 (redescription); Roger, 1860: 307; Mayr, 1862: 732; Mayr, 1863a: 410; Roger, 1863b: 17; Mayr, 1884: 32; Cameron, 1891: 91; Dalla Torre, 1893: 25; Forel, 1895b: 112; Wheeler, 1905c: 120; Emery, 1906c: 113; Forel, 1907d: 2; Wheeler, 1908a: 123; Emery, 1911e: 43; Bruch, 1914: 213; Bruch, 1916: 295; Mann, 1916: 405; Santschi, 1916b: 509; Wheeler, 1916c: 2; Crawley, 1916b: 366; Gallardo, 1918c: 32 (redescription); Santschi, 1919f: 37; Santschi, 1921g: 83; Wheeler, 1923a: 2; Borgmeier, 1923: 57; Wheeler, 1925a: 4; Menozzi, 1935b: 190; Santschi, 1939f: 160; Kusnezov, 1953c: 336; Kusnezov, 1957e: 14 (in key); Brown, 1958g: 209; Kempf, 1961b: 490; Kempf, 1972b: 105; Kugler & Brown, 1982: 6 (in key); Fernández, 1992: 553 (in key).
• Senior synonym of Ectatomma brunneum: Roger, 1860: 307; Roger, 1863b: 17; Mayr, 1863a: 410; Dalla Torre, 1893: 25; Forel, 1895b: 112; Wheeler, 1908a: 123; Emery, 1911e: 43; Bruch, 1916: 295; Gallardo, 1918a: 32; Borgmeier, 1923: 58; Kempf, 1972b: 105.
• Replacement name: Ectatomma brunneum Smith, 1858a.
• [Note: Ectatomma brunneum junior synonym of Ectatomma quadridens Fabricius, 1793 (synonymy by Roger, 1860: 307); hence Ectatomma brunneum first available replacement name (Bolton, 1995b: 187).]

Obsolete combinations

• Formica quadridens

Citations

• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
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• Brown, W. L., Jr. 1958g. Contributions toward a reclassification of the Formicidae. II. Tribe Ectatommini (Hymenoptera). Bulletin of the Museum of Comparative Zoology 118:173-362. PDF
• Bruch, C. 1914. Catálogo sistemático de los formícidos argentinos. Revista del Museo de La Plata 19:211-234. PDF
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