• Orthocrema as genus: Soulié, 1964: 398; Soulié, 1965: 78.
• Orthocrema as junior synonym of Crematogaster: Brown, 1973b: 183 [provisional]; Smith, 1979: 1376; Hölldobler & Wilson, 1990: 13; Ogata, 1991b: 125; Tang et al., 1995: 64.
• Orthocrema as subgenus of Crematogaster: Santschi, 1918d: 182; Emery, 1922c: 130; Wheeler, 1922: 662; subsequent authors; Bolton, 1995b: 40; Bolton, 2003: 239; Blaimer, 2012c: 51.
• Crematogaster (Orthocrema) as senior synonym of Crematogaster (Apterocrema): Blaimer, 2012c: 52.
• Crematogaster (Orthocrema) as senior synonym of Crematogaster (Eucrema): Blaimer, 2012c: 52.
• Crematogaster (Orthocrema) as senior synonym of Crematogaster (Mesocrema): Blaimer, 2012c: 52.
• Crematogaster (Orthocrema) as senior synonym of Crematogaster (Neocrema): Emery, 1922c: 130; Blaimer, 2012c: 52.
• Crematogaster (Orthocrema) as senior synonym of Crematogaster (Rhachiocrema): Blaimer, 2012c: 52.
• Crematogaster (Orthocrema) as senior synonym of Crematogaster (Tranopeltoides): Bolton, 2003: 239; Blaimer, 2012c: 52.

Junior synonyms

• Crematogaster (Apterocrema) Wheeler, 1936
  Obsolete classification(s): Apterocrema
• Crematogaster (Eucrema) Santschi, 1918
• Crematogaster (Mesocrema) Santschi, 1928
• Crematogaster (Neocrema) Santschi, 1918
• Crematogaster (Rhachiocrema) Mann, 1919
• Crematogaster (Tranopeltoides) Wheeler, 1922
  Obsolete classification(s): Tranopeltoides

Obsolete classifications

• Orthocrema

Citations

• Blaimer, B. B. 2012c. A subgeneric revision of Crematogaster and discussion of regional species-groups (Hymenoptera: Formicidae). Zootaxa 3482:47-67. PDF
• Bolton, B. 1995b. A new general catalogue of the ants of the world. Cambridge, Mass.: Harvard University Press, 504 pp.
• Bolton, B. 2003. Synopsis and classification of Formicidae. Memoirs of the American Entomological Institute 71:1-370. PDF
• Brown, W. L., Jr. 1973b. A comparison of the Hylean and Congo-West African rain forest ant faunas. Pp. 161-185 in: Meggers, B. J.; Ayensu, E. S.; Duckworth, W. D. (eds.) 1973. Tropical forest ecosystems in Africa and South America: a comparative review. Washington, D.C.: Smithsonian Institution Press, viii + 350 pp. PDF
• Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B:95-206. PDF
• Hölldobler, B.; Wilson, E. O. 1990. The ants. Cambridge, Mass.: Harvard University Press, xii + 732 pp.
• Ogata, K. 1991b. A generic synopsis of the poneroid complex of the family Formicidae (Hymenoptera). Part II. Subfamily Myrmicinae. Bulletin of the Institute of Tropical Agriculture Kyushu University 14:61-149. PDF
• Santschi, F. 1918d. Sous-genres et synoymies [sic] de Cremastogaster (Hym. Formic.). Bulletin de la Société Entomologique de France 1918:182-185. PDF
• Smith, D. R. 1979. Superfamily Formicoidea. Pp. 1323-1467 in: Krombein, K. V.; Hurd, P. D.; Smith, D. R.; Burks, B. D. (eds.) 1979. Catalog of Hymenoptera in America north of Mexico. Volume 2. Apocrita (Aculeata). Washington, D.C.: Smithsonian Institution Press, pp. i-xvi, 1199-2209.
• Soulié, J. 1964. Sur la répartition géographique des genres de la tribu des Cremastogastrini. Bulletin de la Société d'Histoire Naturelle de Toulouse 99:397-409. PDF
• Soulié, J. 1965. Contribution à la systématique des fourmis de la tribu des "Cremastogastrini" (Hymenoptera - Formicoidea - Myrmicidae). Annales de l'Université d'Abidjan. Série Sciences 1:69-83. PDF
• Tang, J.; Li, S.; Huang, E.; Zhang, B.; Chen, Y. 1995. Economic insect fauna of China. Fasc. 47. Hymenoptera: Formicidae (1). [In Chinese.]. Beijing: Academy of Science Publishing House, ix + 134 pp.
• Wheeler, W. M. 1922. Ants of the American Museum Congo expedition. New York: Bulletin of the American Museum of Natural History, 1139.