Metapone jacobsoni

Distribution based on Regional Taxon Lists
Indo-Australian Region: Indonesia. Oriental Region: India, Nicobar Island.

Nomenclature

 *  jacobsoni. Metapone jacobsoni Crawley, 1924: 389 (q.) INDONESIA (Sumatra). Senior synonym of nicobarensis: Taylor & Alpert, 2016: 518.
 * nicobarensis. Metapone nicobarensis Tiwari & Jonathan, 1986b: 150, fig. 1 (w.q.) INDIA (Nicobar Is). Junior synonym of jacobsoni: Taylor & Alpert, 2016: 518.

Description
Worker diagnosis. General features as in original description (Crawley, 1924), the key above to Asian Metapone species and the relevant Figures. Posterior face of subpetiolar process in oblique view relatively large, triangular; subpetiolar angle in side view approximately a right angle, not spinose; subpetiolar lamella opaque, approximately equilaterally triangular (note that the petiole could not be viewed unobstructed in true profile for illustration; its somewhat obscure outline is highlighted in Fig 45). Other features are adequately illustrated here. Dimensions (holotype, paratype): TL: 8.5, 8.75; HL: 1.48, 1.44; HW (across eyes): 1.00, 1.04; Maximum eye length: 0.42, 0.38; CI: 68, 72; MSL: 2.26, 2.30; PMW: 0.92, 0.94; PDW: 0.70, 0.72; PetL: 0.56, 0.60; PetW: 0.44, 0.46; PetH: 0.72, - ; PpetL: 0.44, - ; PpetW: 0.58, 0.58.