Tetramorium simillimum

Worker: total body length 1.8–2.1 mm. Head dorsum with dense, regular, parallel longitudinal striae; interspaces densely sculptured and mat. Frontal carinae long, strongly developed, running unbroken to posterior margin of head and outcurving posteriorly; antennal scrobes well-developed, forming distinct concavity between frontal carinae and eyes. Antennal scape without erect hairs. Eyes small (EL 0.11–0.13 mm, EW 0.08–0.09 mm). Pronotum reticulate, anterolateral corner angulate. Mesonotum coarsely rugoso-reticulate with wavy, irregular rugae. Upper mesopleuron rugose, lower portion densely punctate (sometimes punctation weak). Mid- and hind-tibiae without erect hairs. Petiole width 0.16–0.18 mm, postpetiole width 0.19–0.23 mm. Gastral tergite 1 in basal 1/3 densely and minutely punctate or coriaceous, mat or weakly shiny. Queen similar to worker but with basal area of tergite micropunctured and mat; erect hairs on head and mesosoma not typically truncate; distance between eyes much shorter than major eye diameter.

Literature