• Lectotype designation: Hosoishi & Ogata, 2009a: 28.
• Combination in Crematogaster (Physocrema): Emery, 1922c: 140
• Combination in Crematogaster (Crematogaster): Blaimer, 2012c: 55.
• Subspecies of Crematogaster difformis: Forel, 1907h: 17; Wheeler, 1919f: 75; Emery, 1922c: 140; Chapman & Capco, 1951: 102; Bolton, 1995b: 162.
• Status as species: Hosoishi & Ogata, 2008: 7 (redescription); Hosoishi & Ogata, 2009a: 28 (redescription); Pfeiffer et al., 2011: 46; Khachonpisitsak et al., 2020: 93; Wang et al., 2022: 77.

Obsolete combinations

• Crematogaster difformis sewardi

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.
• Chapman, J. W.; Capco, S. R. 1951. Check list of the ants (Hymenoptera: Formicidae) of Asia. Monographs of the Institute of Science and Technology. Manila 1:1-327. PDF
• Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B:95-206. PDF
• Forel, A. 1901m. Formiciden des Naturhistorischen Museums zu Hamburg. Neue Calyptomyrmex-, Dacryon-, Podomyrma- und Echinopla-Arten. Mitteilungen aus dem Naturhistorischen Museum in Hamburg 18:43-82. PDF
• Forel, A. 1907h. Formiciden aus dem Naturhistorischen Museum in Hamburg. II. Teil. Neueingänge seit 1900. Mitteilungen aus dem Naturhistorischen Museum in Hamburg 24:1-20. PDF
• Hosoishi, S.; Ogata, K. 2008. The ant genus Crematogaster Lund, subgenus Physocrema Forel, in the Indochinese Peninsula (Hymenoptera: Formicidae). Asian Myrmecology 2:1-10. PDF
• Hosoishi, S.; Ogata, K. 2009a. A taxonomic revision of the Asian endemic subgenus Physocrema of the genus Crematogaster (Hymenoptera: Formicidae). Zootaxa 2062:15-36. PDF
• Khachonpisitsak, S.; Yamane, S.; Sriwichai, P.; Jaitrong, W. 2020. An updated checklist of the ants of Thailand (Hymenoptera, Formicidae). ZooKeys 998:1-182. 10.3897/zookeys.998.54902 PDF
• Pfeiffer, M.; Mezger, D.; Hosoishi, S.; Bakhtiar, E. Y.; Kohout, R. J. 2011. The Formicidae of Borneo (Insecta: Hymenoptera): a preliminary species list. Asian Myrmecology 4:9-58. PDF
• Wang, W. Y.; Soh, E. J. Y.; Yong, G. W. J.; Wong, M. K. L.; Guénard, B.; Economo, E. P.; Yamane, S. 2022. Remarkable diversity in a little red dot: a comprehensive checklist of known ant species in Singapore (Hymenoptera: Formicidae) with notes on ecology and taxonomy. Asian Myrmecology 15: e015006:1-152. [online early] 10.20362/am.015006 PDF
• Wheeler, W. M. 1919f. The ants of Borneo. Bulletin of the Museum of Comparative Zoology 63:43-147. PDF