prothoraxn.
/ˌprəʊˈθɔːraks/, U.S. /ˌproʊˈθɔˌræks/ Entomology.
The first, anterior segment of the thorax of an insect, bearing the forelegs. Cf. mesothorax n., metathorax n.
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the world > animals > invertebrates > phylum Arthropoda > class Insecta > parts of insects > [noun] > thorax > prothorax
collar1826
manitrunk1826
prothorax1826
1826 W. Kirby & W. Spence Introd. Entomol. III. xxxv. 531 I adopt likewise the terms..prothorax, mesothorax, metathorax, to signify the three segments into which the thorax of Linné, or the upper side of the trunk, is resolvable.
1877 T. H. Huxley Man. Anat. Invertebrated Animals vii. 437 The longicorn Beetles produce a sound by the friction of the tergum of the prothorax upon a process of that of the mesothorax.
1930 H. G. Newth Marshall & Hurst's Junior Course Pract. Zool. (ed. 11) x. 173 The prothorax is the first and longest segment of the thorax.
1944 R. Matheson Entomol. for Introd. Courses xiv. 275 The prothorax bears a dorsal sclerite known as the cervical shield.
1994 Cell & Tissue Res. 275 63 The ear is located on the frontal face of the prothorax, directly behind the head capsule.
This entry has been updated (OED Third Edition, September 2007; most recently modified version published online March 2022).
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