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.
Taxonomic history
Lectotype designation: Laciny et al., 2015 PDF: 90.Emery, 1889: 496 (m.); Wheeler & Wheeler, 1952c PDF: 610 (l.).Combination in Diacamma: Mayr, 1862 PDF: 718.Status as species: Roger, 1860 PDF: 305; Mayr, 1862 PDF: 718; Mayr, 1863a PDF: 407; Roger, 1863b PDF: 16; Smith, 1871a PDF: 320; Mayr, 1886c PDF: 358; Emery, 1887f PDF: 435 (in key, footnote); Emery, 1889: 496; Dalla Torre, 1893 PDF: 29; Emery, 1895m: 458; Emery, 1897h: 162 (in key); Forel, 1900f PDF: 319; Bingham, 1903 PDF: 77; Forel, 1906b PDF: 91; Emery, 1911e PDF: 65; Wheeler, 1927b PDF: 42; Mukerjee, 1930 PDF: 150; Menozzi, 1939a PDF: 328; Chapman & Capco, 1951 PDF: 60; Collingwood, 1962c PDF: 224; Bolton, 1995b: 170; Mathew & Tiwari, 2000 PDF: 275; Laciny et al., 2015 PDF: 90 (redescription); Bharti et al., 2016 PDF: 50.Senior synonym of Diacamma compressum: Dalla Torre, 1893 PDF: 29; Emery, 1911e PDF: 65; Bolton, 1995b: 170; Laciny et al., 2015 PDF: 90.
