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Related to prothorax: pronotal, Pronotum, Propleuron


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.


n, pl -thoraxes or -thoraces (-ˈθɔːrəˌsiːz)
(Zoology) the first segment of the thorax of an insect, which bears the first pair of walking legs. See also mesothorax, metathorax


(proʊˈθɔr æks, -ˈθoʊr-)

n., pl. -tho•rax•es, -tho•ra•ces (-ˈθɔr əˌsiz, -ˈθoʊr-)
the anterior division of the thorax of an insect, bearing the first pair of legs.
[1820–30; < New Latin; see pro-1, thorax]
pro`tho•rac′ic (-θɔˈræs ɪk, -θoʊ-) adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.prothorax - the anterior part of an insect's thoraxprothorax - the anterior part of an insect's thorax; bears the first pair of legs
thorax - part of an insect's body that bears the wings and legs
References in periodicals archive ?
A medium-line, opaque, oil-based paint marker was used to paint a mark on the insect's prothorax.
Margin of prothorax ocher with a white spot dorsally on mesothorax, and a conspicuous black spot dorsally on A4 to A5 abdominal segment.
20,23) They are morphologically similar, with a narrow body, black head, at least two abdominal segments, and the prothorax and the first 5 abdominal segments are russet coloured (14) (Fig.
Peritrich colonies with a maximum of five or six branches were observed attached to the venter of the extended nasale, on the mouthparts, ventrally at the union of the cranium and prothorax, and on the seventh abdominal segment.
4) combined with an adult insect prothorax showed that this internal wood damage was caused by metallic wood borers (Buprestis aurulenta).
Morphometric variables were body length (BL) (from the phastigium to the articulation of the 3rd femur), 3rd femur length (FL), 3rd tibia length (TiL), pronotum length (TxL), prothorax height (TxH), and tegmen length (TgL).
Head and prothorax continuously covered by appressed tomentum; prothorax with a deep, dense and regular punctation.
After 80 h, the black discoloration spread toward the metathorax, mesothorax, prothorax, and pleural region, and the abdomen was completely compressed and dehydrated.
No macropterous form is known for any of the two species of Paraphrynovelia, and Damgaard (2008b) could not find any convincing morphological characters to diagnose Paraphrynoveliidae, whereas Macroveliidae was diagnosed by the presence of paired, longitudinal ridges of the basal abdominal tergites and two characters also found in Hydrometridae: Eyes distinctly removed from the anterior margin of prothorax and the dorsally placed metathoracic spiracle.
The prothorax was characterized by small paired sternites and a notum bearing hair-like sensilla anteriorly and on lateral margins.
Females similar to males, but devoid of secondary sexual characteristics (frontoclypeal horn, pronotal plate and abdominal sex patch) on head, pronotum or abdomen; the prothorax is narrower at the anterior portion, its anterior edge broadly rounded and anterior angles more obtuse than those of males.