Table 1 in A new subterranean species and an updated checklist of Strumigenys (Hymenoptera, Formicidae) from Macao SAR, China, with a key to species of the Greater Bay Area

Table 1. Morphological measurements used. Morphological terminology follows Tang et al. (2019).
TLTotal Length: measured from the mandibular apex to the posterior margin of abdominal tergite IV. Sum of MandL + HL + ML + PetL + PosPetL + ATL.HLHead Length: measured from the midpoint of the occipital margin to the midpoint of the anterior clypeal margin. If one or both margins are concave, measured from the midpoint of a transverse line spanning the apices of the projecting portions.HWHead Width: measured at the maximum width of the head in full-face view, excluding the eyes.MandLMandible Length: measured from the mandibular apex to the anterior clypeal margin. If clypeal margin concave medially, measured from the transverse line connecting the anteriormost points.SLScape Length: measured from the basal constriction that occurs distal of the condylar bulb.ELEye Length: maximum diameter of the eye.PrWPronotal Width: maximum width of the pronotum in dorsal view. If present, projecting tubercles or other cuticular prominences at the pronotal humeral angles ignored.WLWeber’s Length: diagonal length of the mesosoma in profile view. Measured from the point at which the pronotum meets the cervical shield to the posterior basal angle of the metapleuron.PetLPetiolar Length: maximum length of petiole. Measured from posterior petiolar margin to the anteriormost point before posteroventral lobes of the propodeum obscure petiole. If present, spongiform tissues are ignored.PetHPetiolar Height: maximum distance measured between two parallel lines, one tangent with the node apex and the other tangent with the ventral-most point of the petiole in profile. If ventral margin concave upward, measure from the lower line tangent to the uppermost portion of the curve. If present, spongiform tissues ignored.DPetWDorsal Petiolar Width: maximum width of petiolar node in dorsal view.PosPetLPostpetiole Length: maximum length of postpetiole, measured from the anterior margin to the posterior margin. If present, spongiform tissues are ignored.ATLAbdominal tergum IV Length: maximum length of the fourth abdominal tergite, measured from the anterior margin to the posterior margin.MtfmLMetafemur length: maximum length of the metafemur, not including the trochanter.MttbLMetatibia length: maximum length of the metatibia.CICephalic Index: HW / HL × 100MIMandibular Index: MandL / HL × 100SIScape Index: SL / HW × 100PIPronotum Index: PrW/ HW x 100OIOcular Index: EL / HW × 100LPILateral Petiolar Index: PetH / PetL × 100DPIDorsal Petiolar Index: DPetW / PetL × 100