Metapone emersoni

Identification
Lateral margins of raised median portion of clypeus markedly convergent anteriorly from the level of the antennal insertions (Fig 6). Petiolar dorsum from above approximately twice as wide as long (Fig 6). Postpetiolar sternite in profile view appearing as a long, slender process (Fig 5) (Madagascar).

Distribution based on Regional Taxon Lists
Malagasy Region: Madagascar.

Nomenclature

 *  emersoni. Metapone emersoni Gregg, 1958: 115, fig. 2 (w.) MADAGASCAR. See also: Alpert, 2007: 10.

Description
Worker diagnosis. General and diagnostic features as illustrated and in the key to African and Madagascan species above (note paired anteromedian clypeal denticles, sub-parallel lateral clypeal margins, transverse petiolar node, and unextended postpetiolar sternite). Eyes minute, diameter of each about half the width of the second funicular antennomere; with 8–10 extremely minute, somewhat obscure facets. Mesosoma In dorsal view slightly constricted at promesonotal/propodeal junction, with accompanying short vestigial traces of the metanotal suture on each side. Subpetiolar process: (Fig 2) more-or-less basic in structure—relatively deep, the posterior face a narrow isosceles triangle, subpetiolar angle obtuse in side view, without spinose extension. Subpetiolar extension lamellate, scalene-triangular, with a short posteroventral edge, the apex posteroventral, the base almost as long as the subpetiolar edge. See also the detailed original description (Gregg, 1958). Madagascar, Andohahela, 25°46’35’’S, 46°42’19”E, 320m, tropical dry forest, leg Pascal Rabeson.