Linear morphometry of Stigmatomma species in the Malagasy bioregion – raw data set of measurements and indices

Measurements were taken on a Leica MZ APO stereomicroscope, rounded to the nearest 0.01 mm. Head length (HL): in fullface view, straight line from the anterior clypeal margin to the midpoint of a straight imaginary line connecting posterior corners of the head.
Head width (HW): maximum width of the head, including eyes when present.
Head width 2 (HW2): width of the head immediately posterior to the posterolateral margin of the clypeus.
Scape length (SL): length of the scape (first antennal segment), excluding its basal constriction or neck and condyle.
Mandibular length (ML): outer length of the mandible.
Weber’s length of mesosoma (WL): diagonal length of the mesosoma in profile, from base of anterior slope of pronotum to metapleural lobe.
Propodeal posterior width (PPW): width of posterior margin of propodeal dorsal face, in dorsal view.
Petiolar length (PtL): maximum length of petiole in dorsal view.
Petiolar width (PtW): maximum width of petiole in dorsal view.
Cephalic index (CI): HW/HL ×100.
Scape index (SI): SL/HL ×100.
Mandibular index (MI): ML/HL ×100.
Petiolar index (PtI): PtL/PtW ×100.