• Combination in Pachycondyla: Brown, 1995a: 306
• Combination in Bothroponera: Schmidt & Shattuck, 2014: 77
• Subspecies of Bothroponera crassa: Emery, 1911e: 77; Santschi, 1914b: 50; Wheeler, 1922: 770; Bolton, 1995b: 306.
• Senior synonym of Bothroponera crassior: Joma & Mackay, 2017: 17.
• [Note: Joma & Mackay, 2017: 17, give Bothroponera crassior as senior synonym, but Bothroponera ilgii has priority.]
• Senior synonym of Bothroponera crassa gamzea Özdikmen, 2010c (unnecessary replacement name for Bothroponera ilgii Forel, 1910c).

Junior synonyms

• Bothroponera crassa gamzea (Özdikmen, 2010)
• Bothroponera crassior Santschi, 1930
  Obsolete combination(s): Bothroponera crassa crassior

Obsolete combinations

• Pachycondyla crassa ilgii

Citations

• Baroni Urbani, C. 1973b. Katalog der Typen von Formicidae (Hymenoptera) der Sammlung des Naturhistorischen Museums Basel. Mitteilungen der Entomologischen Gesellschaft Basel (n.s.)23:122-152.
• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Brown, W. L., Jr. 1995a. [Untitled. Taxonomic changes in Pachycondyla and Neoponera attributed to Brown.]. Pp. 302-311 in: Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Emery, C. 1911e. Hymenoptera. Fam. Formicidae. Subfam. Ponerinae. Genera Insectorum 118:1-125. PDF
• Forel, A. 1910c. Ameisen aus der Kolonie Erythräa. Gesammelt von Prof. Dr. K. Escherich (nebst einigen in West-Abessinien von Herrn A. Ilg gesammelten Ameisen). Zoologische Jahrbücher. Abteilung für Systematik, Geographie und Biologie der Tiere 29:243-274. PDF
• Joma, A. M. A.; Mackay, W. P. 2017. Revision of the African ants of the Bothroponera sulcata species complex (Hymenoptera: Formicidae: Ponerinae). Transactions of the American Entomological Society 143:7-71. PDF
• Santschi, F. 1914b. Voyage de Ch. Alluaud et R. Jeannel en Afrique Orientale, 1911-1912. Résultats scientifiques. Insectes Hyménoptères. II. Formicidae. Paris: Libr. A. Schulz, pp. 41-148. PDF
• Schmidt, C. A.; Shattuck, S. O. 2014. The higher classification of the ant subfamily Ponerinae (Hymenoptera: Formicidae), with a review of ponerine ecology and behavior. Zootaxa 3817 (1):1-242. 10.11646/zootaxa.3817.1.1 PDF
• Wheeler, W. M. 1922. Ants of the American Museum Congo expedition. New York: Bulletin of the American Museum of Natural History, 1139.