petiolar node square shaped (Tetramorium)

The petiolar node is square shaped, with discrete and nearly flat anterior, dorsal and posterior faces. Used in Antkey to separate Tetramorium bicarinatum, Tetramorium caldarium, Tetramorium caespitum cf, Tetramorium simillimum and Tetramorium tsushimae from all other Tetramorium.