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The mesothorax is the middle of the three segments of the thorax of hexapods, and bears the second pair of legs. Its principal sclerites (exoskeletal plates) are the mesonotum ( dorsal ), the mesosternum ( ventral ), and the mesopleuron ( lateral ) on each side.
It is formed by the prothorax, mesothorax and metathorax and comprises the scutellum; the cervix, a membrane that separates the head from the thorax; and the pleuron, a lateral sclerite of the thorax. In dragonflies and damselflies, the mesothorax and metathorax are fused together to form the synthorax. [1] [2]
The insect thorax has three segments: the prothorax, mesothorax, and metathorax. The anterior segment, closest to the head, is the prothorax; its major features are the first pair of legs and the pronotum. The middle segment is the mesothorax; its major features are the second pair of legs and the anterior wings, if any.
Bodianus mesothorax, the split-level hogfish, blackbelt hogfish, black-belt hogfish, coral hogfish, eclipse hogfish, eclipse pigfish, mesothorax hogfish or yellow-spotted hogfish, [3] is a species of wrasse native to the western Pacific Ocean and the eastern Indian Ocean.
The mesothorax is evolved to have more powerful muscles to propel moth or butterfly through the air, with the wing of said segment having a stronger vein structure. [ 33 ] : 560 The largest superfamily, Noctuidae , has the wings modified to act as tympanal or hearing organs [ 50 ] Modifications in the wing's venation include: [ 49 ]
In consequence of this morphological structure, the mesothorax represents the segment of greater development and complexity, while the prothorax and metathorax are considerably reduced. The halteres are club-shaped organs, used to balance the insect in flight, consisting of a proximal portion connected to a mechano-sensory organ.
The mesothorax is larger than the other metasomal segments. The mesonotum consists of 2 parts which are divided by the scuto-scutellar suture. The anterior part is divided into the mesoscutum and scapulae by longitudinal parapsidal striae, while the posterior side is divided into the axillae and scutellum.
Tegula (insect anatomy), a part of the wings attached to the mesothorax, in various insects Tegula (primate anatomy) , claw-like nails found in New World monkeys Imbrex and tegula , interlocking roofing tiles used in ancient Greek and Roman architecture