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Taxonomic history
| Emery, 1889: 496 (m.); Wheeler & Wheeler, 1952c PDF: 610 (l.). |
| Combination in Diacamma: Mayr, 1862 PDF: 718. |
| Senior synonym of Diacamma compressum: Dalla Torre, 1893 PDF: 29; Emery, 1911e PDF: 65. |
| Laciny, Pal & Zettel, 2015 PDF: 90 (lectotype designation). |
Workers of D. scalpratum collected in Thung Salaengluang National Park (Phitsanulok province) have a pair of 8-10 ovarioles, whereas workers from Saraburi province have a pair of 4 ovarioles. Together with differences in thoracic sculpture, petiole shape and male genitalia, this suggests that two species are included under D. scalpratum.
Type specimens: Holotype of Diacamma scalpratum: casent0900667; Lectotype of Diacamma compressum: casent0915970