Megalomyrmex timbira

The type material consisted of two foragers collected from the ground in tropical forest.

Identification
Brandão (1990) - M. timbira can be distinguished from all other species of the Leoninus group by the shape of propodeum, in lateral view.

Distribution based on Regional Taxon Lists
Neotropical Region: Ecuador, Venezuela.

Nomenclature

 *  timbira. Megalomyrmex timbira Brandão, 1990: 439, figs. 45, 49 (w.) VENEZUELA.

Worker
Mandible smooth; anterior clypeal border straight without median denticle; 3-segmented antennal club: frontal suture impressed; 18 ocular facets at compound eyes largest diameter; promesonotal suture impressed dorsally; dorsal face and declivity of propodeum meeting, in side view, in a 120° angle, forming nonsharp teeth in lateral view; declivity smooth and non-depressed longitudinally: mesosternum and metasternum without acrotergites: epipetiolar carina complete: non-pedunculate petiole with anteroventral denticle: dorsal margin of petiolar node, in side view. concave; dorsal margin of petiolar node, in frontal view, subquadrate; ventral face of postpetiole without process; apex of femura acuminate.

Color: dark reddish-brown, almost black.

Type Material
La Flautera, ca. Palmira. Tachira, Venezuela, 1200m (07°51'N, 72°13'W). Holotype and paratype at Museu de Zoologia da USP; paratype at Facultad de Agronomia de Maracay, Venezuela. The type workers have been collected by John Lattke, foraging isolated on the ground of a tropical forest in August 8, 1983.

Etymology
The word timbira means orphan in Tupi, referring to the lack of true queens in the Leoninus group.