A slender, pointed sting used for hunting and defense is located at the apical end of the gaster. Sometimes it is not fully extruded and difficult to see. Used in Antkey to separate all other subfamilies from Dolichoderinae and Formicinae.
The posterior tip of the string is shaped like a pendant, or triangle. Used in Antkey to separate Tetramorium from all other myrmicines.
The sting is simple, tapering evenly into a posterior point. Used in Antkey to separate all other myrmicine genera from Tetramorium.
Some terms associated with ant morphology (profile view).
gaster armed with sting (Hypoponera opaciceps)
gaster armed with sting (Odontomachus simillimus)