Tetramorium bessonii, Forel, 1891

Francisco Hita Garcia, T. T. & Fisher, Brian L., 2011, 3039, Zootaxa 3039, pp. 1-72 : 49

Tetramorium bessonii species group

Diagnosis

Eleven-segmented antennae; anterior clypeal margin medially impressed; frontal carinae well-developed and usually ending between posterior eye margin and posterior head margin; anterior face of mesosoma not well-developed and no distinct anterodorsal angle present; no distinct margination between lateral and dorsal mesosoma, sides of mesosoma smoothly rounding onto dorsum; propodeal spines medium-sized to long, elongate-triangular to spinose; propodeal lobes triangular and short; petiolar node usually moderately squamiform and anteroposteriorly compressed to triangular or cuneiform, in profile much higher than long, in dorsal view typically distinctly wider than long, anterior and posterior faces not parallel, anterodorsal angle generally better developed than posterodorsal angle, and rarely at about same height, dorsum generally tapering strongly backwards; postpetiole roughly rounded; mandibles generally sculptured; cephalic sculpturation to large extent reduced; mesosoma usually unsculptured, in one species superficial, weak sculpturation present; waist segments and gaster unsculptured, smooth, and shiny; pilosity on dorsal surfaces of head, mesosoma, and waist segments variable; first gastral tergite either without any standing hairs at all, only with short to relatively long, appressed to decumbent pubescence, or with medium-sized appressed to decumbent pubescence intermixed with relatively few erect hairs; sting appendage spatulate.