Which body parts make up an adult beetle?

Like all adult insects, the body of an adult beetle is divided into three primary regions: the head, the thorax, and the abdomen.1

• Head: This region typically features antennae, mandibles (jaws) used for biting or chewing, and compound eyes. In many beetles, the head may be recessed into the prothorax or hidden under the pronotum.1
• Thorax: This region is composed of three segments. The prothorax is the distinct region between the head and the trunk, covered by the pronotum. The mesothorax and metathorax are attached to the abdomen and are generally hidden beneath the elytra, which are the hardened front wings that serve as protective covers. The thorax also bears three pairs of legs and the hindwings used for flight.12
• Abdomen: This region consists of 9 or 10 segments, though often only five to eight are externally visible. Each segment typically includes a pair of spiracles, which are openings for the respiratory system.1