Pentatomidae, Greek pente meaning five and tomos meaning section, is a family of insects belonging to order Hemiptera including some of the stink bugs and shield bugs. The scutellum body is typically half of an inch long, green or brown color, usually trapezoidal in shape, giving this family the name 'shield bug'. The tarsi are 3-segmented. The forewings of stink bugs are called hemelytra, with the basal half thickened while the apex is membranous (as are the hindwings). The stink bug, also called stinkbug, derives its name from its tendency to eject a foul smelling glandular substance secreted from pores in the thorax when disturbed; in some species the liquid contains cyanide compounds with a rancid almond scent. This is a form of antipredator adaptation. The idiomatic term 'stink bug' is also applied to distantly related species such as Boisea trivittata, the 'boxelder bug', and entirely different types of insects such as beetles in the genus Eleodes ('pinacate beetles').
Contributions by Trfasulo, ClueBot NG, and Dyanega.