Metapone emersoni

Most often found in wet forest habitats, specimens have been collected from rotten logs and, for one nest, in a dead branch above the ground.

Identification
Lateral margins of raised median portion of clypeus markedly convergent anteriorly from the level of the antennal insertions. Petiolar dorsum from above approximately twice as wide as long. Postpetiolar sternite in profile view appearing as a long, slender process (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
Taylor and Alpert (2016) - General and diagnostic features as illustrated and in key (note especially the entire anterior clypeal border without median denticles, anteriorly converging lateral clypeal margins, relatively very wide petiolar node, and extended postpetiolar sternite appearing spinous in lateral view). Eyes structured similarly to those of Metapone madagascarica but a little larger. Subpetiolar process more-or-less basic in structure, the posterior face triangular, subpetiolar angle obtuse in side view, without spinose extension. Subpetiolar extension lamellate, approximately semi-circular, its base about two-thirds as long as the subpetiolar edge.

Type Material
Taylor and Alpert (2016) - Worker. 12 miles from Perinet [18°55'S, 48°25'E], Madagascar.