Tetramorium obesum species group


 * ''Tetramorium antennatum
 * ''Tetramorium brevidentatum
 * ''Tetramorium chepocha
 * ''Tetramorium coonoorense
 * ''Tetramorium decamerum
 * ''Tetramorium indosinense
 * ''Tetramorium lanuginosum
 * ''Tetramorium obesum
 * ''Tetramorium pacificum
 * ''Tetramorium rossi

Based on Bolton 1976, Hita Garcia and Fisher 2011.

Tetramorium species groups

Diagnosis
12-segmented antennae; anterior clypeal margin with weak median impression; frontal carinae well-developed, ending between posterior eye margin and posterior head margin, curving down ventrally and forming the posterior scrobe margin; anterior face of mesosoma not developed and mesosomal profile strongly rounded; margination between lateral and dorsal mesosoma present; propodeal spines medium-sized to long and spinose; propodeal lobes triangular and short; petiolar node nodiform; postpetiole roughly rounded; mandibles usually sculptured; cephalic sculpturation well-developed, mostly reticulate-rugose, ground sculpturation of head generally faint or absent; mesosoma and waist segments reticulate-rugose; first gastral tergite unsculptured, smooth, and shiny; all dorsal surfaces with long, erect hairs, usually a mixture of simple and bifid hairs, less commonly including trifid hairs; sting appendage triangular.