Description
Pentatomoidea are characterized by a well developed scutellum (the hardened extension of the thorax over the abdomen). It can be triangular to semi-elliptical in shape. Pentatomoidea usually have an antennae with five segments. The tarsi usually have two or three segments.
Shield bugs have glands in their thorax between the first and second pair of legs which produce a foul smelling liquid. This liquid is used defensively to deter potential predators and is sometimes released when the bugs are handled carelessly.
The nymphs, similar to adults except smaller and without wings, also have stink glands.
The nymphs and adults have piercing mouthparts, which most use to suck sap from plants, although some eat other insects. When they group in large numbers, they can become significant pests.
Species that resemble pentatomoids are found in the superfamily Coreoidea.
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