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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.
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.
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]
Dipteran morphology differs in some significant ways from the broader morphology of insects. The Diptera is a very large and diverse order of mostly small to medium-sized insects. They have prominent compound eyes on a mobile head, and (at most) one pair of functional, membraneous wings, [ 1 ] which are attached to a complex mesothorax.
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 ]
The metathorax is the posterior of the three segments in the thorax of an insect, and bears the third pair of legs.Its principal sclerites (exoskeletal plates) are the metanotum (), the metasternum (), and the metapleuron on each side.
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.
mesothorax the middle segment of the thorax, between the prothorax and the metathorax. metalmarks small metallic-looking spots commonly found on the wings of Riodinidae. metathorax The third and last segment of the thorax after the mesothorax. micropterous Having short elytra, shorter than the abdomen. mixomycetophagy feeding on myxomycetes ...