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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.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


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
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(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.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
5b) Puente maxilar ausente, estiletes maxilares retraidos hasta el nivel de las sedas postoculares y muy cercanos entre si (distancia entre ellos menor a un cuarto del ancho de la cabeza), cono bucal largo y puntiagudo extendiendose mas alla del prosterno, propleuron dividido en dos escleritos y con un par de sedas notopleurales, basantra prosternal ausente Hoplandrothrips Hoplandrothrips sp.
The only difference found when compared with the type series was in the color of propleuron, which is completely orange in the Ecuadorian specimen, as compared with mostly black in the Brazilian specimens.
1); mandible with 3 similarly sized teeth; pronope medium-sized to obsolescent; propleuron glabrous or setose; notauli incomplete; metanotum with a distinct acute median spine or triangular protuberance; vein 1-SR of fore wing 3 to 7 times as long as its minimum width (Fig.
Propleuron and anterior margin of pronotum brownish yellow to reddish brown.
Midlobe: Continuing laterad, delimited from short propleuron by horizontal notopleural sulcus anterior to supracoxal lobes; a depression delimiting the "proepimeral lobe" (=ventral continuation of posterior lobe of pronotum) short, pointed, contacting posterior prosupracoxale and bearing a groove starting in front of humeral angles and terminating at the posterior margin of "proepimeral lobe." MESOSCUTTELLUM (Fig.
Mesosoma mostly orange, mesoscutum with two ferruginous spots (submedial one bigger than posterior one); propleuron, mesopleuron and metapleuron light orange.
Body 26 mm long, obscure dull red with following black markings: vertex, extending to occiput usually at the apex of antennae, propleuron, mesopleuron except two red patches, metapleuron except a red patch on upper metapleuron, mesoscutum, base of petiole, apical half of second tergite and whole of the remaining tergites.
el material recolectado corresponde a machos grandes, con setas fuertes y gruesas en la parte del propleuron, pronoto ancho con forma de armadura y presentan el par de setas anteroangulares del pronoto muy desarrolladas (Mound & Tree 2013, Mound et al.
Pronotum: Pale green to pale straw colored, with double longitudinal fuscous line medially and single longitudinal black line on each side between lateral margin and midline; mesoscutum and scutellum pale greenish yellow to straw colored, with continuation of dark medial and lateral lines from pronotum; posterolateral area of mesoscutum dark, lateral lines mark lateral margin of scutellum; propleuron dark anterior of coxal cleft and pale yellow to straw colored, with variable broad slightly dusky to dark brown medial.