mesothorax

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Definitions (3)

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  1. noun The middle of the three divisions of the thorax of an insect, bearing the middle pair of legs and the first pair of wings.

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Examples

  • Many of the names which he proposed are still in use; it was he who introduced the terms prothorax, mesothorax, and metathorax, for the three segments of the insect's thorax. —  Form and Function A Contribution to the History of Animal Morphology
  • Thorax: the disk expanded, slightly convex above, with the margins acute and curving upwards; the anterior margin transverse, rather wider than the head, with the lateral angles slightly curved forwards, and very acute; the lateral margins of the prothorax curved backwards and inwards; the margins of the mesothorax are rounded; the pro - and mesothorax highly polished above, forming an escutcheon-shaped disk; the metathorax opake, and sprinkled with a few short glittering hairs, armed posteriorly with two long very acute spines, divergent and directed backwards. —  Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology
  • Black; head, pro - and mesothorax, as well as the scutellum, glassy-smooth and shining; the face covered with silvery-white pile; the antennæ, tips of the mandibles, and the legs ferruginous; the palpi elongate and pale rufo-testaceous. —  Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology
  • Head and thorax black; the face densely clothed with pale golden pubescence; the labrum and mandibles highly polished, very smooth and shining; a thin pale pubescence is scattered over the head, pro - and mesothorax, the latter obscurely chalybeous above, shining, and finely and closely punctured, with an abbreviated, deeply impressed line in the middle anteriorly; the posterior margin of the prothorax covered with shining silvery pubescence; the metathorax opake, and clothed with black pubescence; wings fusco-hyaline, the anterior pair darkest towards their base, the nervures dark fusco-ferruginous, nearly black. —  Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology
  • Thorax: the margins of the prothorax, two longitudinal stripes on the mesothorax, the scutellum, postscutellum, and sides of the metathorax broadly, yellow; the legs beneath, the coxæ and the sides of the thorax spotted with yellow; the intermediate and posterior coxæ spotted with ferruginous or fusco-ferruginous; the metathorax finely striated transversely; the wings hyaline with the nervures ferruginous. —  Journal of the Proceedings of the Linnean Society - Vol. 3 Zoology
 

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Etymologies (1)

Toggle Century etymologies Century Dictionary (1)

  1. New Latin, from Greek μέσος, middle, + θώραξ, chest: see thorax.
 

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/mɛsəˈθoʊræks/
by American Heritage

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