metathoracic

Metathoracic refers to the third and hindmost segment of the thorax in insects. It is typically the largest and most robust segment of the thorax. This segment is primarily associated with the hind wings and hind legs. The metathorax bears the hindmost pair of legs, which are often specialized for jumping, as seen in grasshoppers and fleas, or for other functions like swimming in aquatic insects. It also bears the hind wings, which are generally larger than the forewings and are responsible for a significant portion of the propulsive force during flight. In some insects, like beetles, the hind wings are modified into hardened elytra, which protect the delicate hind wings when at rest. The metathorax plays a crucial role in locomotion, particularly in flight and jumping, and its structure is highly adapted to the specific ecological niche and lifestyle of the insect. It is a key region for muscle attachment, providing the power for these movements.