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n. pl. pro·tho·rax·es or pro·tho·ra·ces (-thôr′ə-sēz′)
The anterior division of the thorax of an insect, bearing the first pair of legs.

pro′tho·rac′ic (-thə-răs′ĭk) adj.


(Zoology) relating to an insect's prothorax
References in periodicals archive ?
It has been suggested that the underlying neural network involved in the selective phonotaxis of female crickets is partly based in the prothoracic ganglion.
The chemical constituent of this pesticide interferes with the synthesis and the release of hormones (ecdysteroids) from the prothoracic gland, which leads to incomplete ecdysis in immature insects (Isman, 2006).
The presence of the prothoracic tergite, with a semi-sclerotic appearance, was notable.
Legs brown, hind legs darker; hind femur, hind tibia with basal paler ring; hind tibial comb with 7 spines; prothoracic tarsal ratio 1.
Thorax: Prosternum large, abutting proepisternum and prothoracic coxae; dorsal (anterior) margin of prosternum with distinct flange-like projection (75); mesonotum strongly humped; postmetacoxal area membranous; anatergites asetose; pulvilli well developed; alula highly reduced (130); anal lobe and alula reduced and without bordering vein (ie.
Conspicuous spatulate-tipped setae are present as follows: at anterior margin on prothoracic shield, in pairs dorsally on other segments (Fig.
Among neurohormones released by the CC are prothoracicotropic (activating the prothoracic glands to produce the ecdvsteroid molting hormone), diuretic, and antidiuretic hormones (neuroparsins, ion transport peptide, and other hormones controlling insect salt and water homeostasis) (Kind el al.
At the beginning of the 1940s, Fukuda first proposed that prothoracic ground (PG) secrets a molting hormone.