Adelomyrmex brevispinosus Fernandez

Fernández, F., 2003, Revision of the myrmicine ants of the Adelomyrmex genus-group (Hymenoptera: Formicidae)., Zootaxa 361, pp. 1-52 : 15-16

Adelomyrmex brevispinosus Fernandez (Figs. 45-50)

Adelomyrmex brevispinosus Fernandez , 2003:596 (w) in: Fernández & MacKay, 2003.

Worker diagnosis. Mandibles with 5 teeth, the three apical-most larger. Tooth of basal border very close to mandibular base. Anterior margin of clypeal plate slightly concave. Eye with about 17 ommatidia. Hypostomal tooth small. Promesonotum evenly convex and clearly higher than propodeum. Metanotal groove well marked. Propodeal teeth short, subacute, wider than long. Head and promesonotum with longitudinal striation. Promesonotum with smooth and shining central spot, variable in size; if small the striae are concentric. Posterior face of propodeum with transverse carinae except in the middle, which is smooth and shining. Petiole and postpetiole with transverse oblique striation, continued posteriorly. Sides of pronotum with coarse, irregular striae. Short scattered hairs. Sides of mesosoma with long striae. Body dark, appendages dark brown.

Queen and male: unknown.

Comments. This species can be separated from the others in the genus by the short propodeal spines (wider than long) and by the smooth and shiny central area on the central part of the promesonotum. When this shiny area is large, the sculpture tends to form concentric circles around the area (Fig. 49). The anterior margin of the clypeus is straight to slightly convex. The color of this ant ranges from dark brown to black.

A. brevispinosus is known from México and Costa Rica (for detailed distribution see Fernández & MacKay, 2003:598-599).