prothorax

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Related to Prosternum: Propleuron

prothorax

(prō-thôr′ăks′)
n. pl. pro·thoraxes or pro·thoraces (-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.

prothorax

the first thoracic segment in insects.
References in periodicals archive ?
Prosternal process: portion of the prosternum extending posteriorly between the procoxae.
Setae A2 and M2 on prosternum and seta A2 on thoracic sterna short, sensilliform; length of prosternal A2 = 3 [micro]m, of prosternal M2 = 1 [micro]m (Figs.
--Antennal style lacking long setae; prosternum small, disassociated from proepisternum and prothoracic coxae; alula moderately well developed 18
2B, D); labium slightly surpassing posterior margin of prosternum, but not reaching middle of mesosternum (Fig.
1d); lateral prothoracic carina extending from base to 0.44 to 0.50 distance to coxal cavity; without short median impressed line on median basal lobe; prosternum separating procoxae for 0.70 to 0.83 their length.
Pleura light brown, with posterior margin of each sclerite blackish; prosternum light brown, with darker margins ; meso- and metasternum brown, with darker margins .
11 Prosternum bare; 3 or 4 pairs of postsutural dorsocentral setae; acrostichals 3:3, strongly developed; 1 species ...
Venter: generally reddish to dark-reddish; pale to whitish on prosternum, extensive areas on propleura and abdominal sternites 3-7; mostly dense with semi-erect to erect golden yellow hairs.
Some characteristics are strikingly similar, such as the shape and size of the fastigium and the subgenital plate or the prothorax coloration, with distinct and bright lateral bands on the pronotum and on the median zone of the prosternum.
Morphology and evolution of the insect thorax) the prosternum in Chauliognathus consists of a short basisternum which is continuous with the furcasternum bearing simple, paired furcae.