Tetramorium tortuosum species group Diagnosis Eleven-segmented antennae; anterior clypeal margin medially impressed; frontal carinae well-developed and usually running to posterior head margin; anterior face of mesosoma weakly developed; margination between lateral and dorsal mesosoma variably developed; propodeal spines always long to very long, and spinose; propodeal lobes triangular and short; petiolar node rectangular nodiform to clublike, antero- and posterodorsal angles usually well-defined, usually longer than high and longer than wide, sometimes roughly as long as high but then longer than wide; postpetiole usually roughly rounded; mandibles strongly sculptured in most species; cephalic sculpturation distinct and predominantly longitudinally rugose; mesosoma and waist segments with distinct sculpturation; gaster generally unsculptured and smooth, but sculpturation present in a few species; in most species all dorsal surfaces of head, mesosoma, waist segments and first gastral tergite with abundant long, standing hairs, never short, dense, and appressed; sting appendage spatulate.

Published as part of Francisco Hita Garcia, T. T. & Fisher, Brian L., 2011, 3039, pp. 1-72 in Zootaxa 3039 on page 62