• Lectotype designation: Hosoishi & Ogata, 2009a: 27.
• Combination in Crematogaster (Physocrema): Emery, 1922c: 140
• Combination in Crematogaster (Crematogaster): Blaimer, 2012c: 55.
• Subspecies of Crematogaster difformis: Emery, 1893m: 81 (footnote); Emery, 1895m: 468; Forel, 1903a: 683; Wheeler, 1919f: 75; Emery, 1922c: 140; Chapman & Capco, 1951: 102; Bolton, 1995b: 160.
• Status as species: Dalla Torre, 1893: 84; Bingham, 1903: 146; Hosoishi & Ogata, 2008: 6 (redescription); Hosoishi & Ogata, 2009a: 27 (redescription); Pfeiffer et al., 2011: 46; Khachonpisitsak et al., 2020: 91.

Obsolete combinations

• Crematogaster difformis physothorax

Citations

• Bingham, C. T. 1903. The fauna of British India, including Ceylon and Burma. Hymenoptera, Vol. II. Ants and Cuckoo-wasps. London: Taylor and Francis, 506 pp. PDF
• 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
• Dalla Torre, K. W. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. PDF
• Emery, C. 1889. Formiche di Birmania e del Tenasserim raccolte da Leonardo Fea (1885-87). Dummy reference. Annali del Museo Civico di Storia Naturale 27[=(2)7]:485-520.
• Emery, C. 1893m. [Untitled. Taxonomic changes in various genera attributed to Emery.]. Pp. 4-266 in: Dalla Torre, K. W. 1893. Catalogus Hymenopterorum hucusque descriptorum systematicus et synonymicus. Vol. 7. Formicidae (Heterogyna). Leipzig: W. Engelmann, 289 pp. PDF
• Emery, C. 1895m. Viaggio di Leonardo Fea in Birmania e regioni vicine. LXIII. Formiche di Birmania del Tenasserim e dei Monti Carin raccolte da L. Fea. Parte II. Annali del Museo Civico di Storia Naturale 34[=(2)14]:450-483.
• Emery, C. 1922c. Hymenoptera. Fam. Formicidae. Subfam. Myrmicinae. [part]. Genera Insectorum 174B:95-206. PDF
• Forel, A. 1903a. Les Formicides de l'Empire des Indes et de Ceylan. Part X. Journal of the Bombay Natural History Society 14:679-715. 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
• Wheeler, W. M. 1919f. The ants of Borneo. Bulletin of the Museum of Comparative Zoology 63:43-147. PDF