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The mesothorax and metathorax each have a pleural suture (mesopleural and metapleural sutures) that runs from the wing base to the coxa of the leg. The sclerite anterior to the pleural suture is called the episternum (serially, the mesepisternum and metepisternum).
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 suture separates two regions: 1. the upper one is the frontal region, which has continuity with the apex, the orbital region and the gena, 2. the lower one, the face or clypeus, contains the insertion of the antennae and ends with the epistomal edge which comprises the upper lip.
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 ...
Metapleural glands (also called metasternal or metathoracic glands) are secretory glands that were considered unique to ants and basal in the evolutionary history of ants. They are responsible for the production of an antibiotic fluid that then collects in a reservoir on the posterior of the ant's alitrunk .
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The wings, head parts of thorax, and abdomen of Lepidoptera are covered with minute scales, from which feature the order Lepidoptera derives its names, the word lepidos in Ancient Greek meaning "scale". Most scales are lamellar (blade like) and attached with a pedicel, while other forms may be hair like or specialised as secondary sexual ...
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