prothorax


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Related to prothorax: pronotal, Pronotum, 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 ?
This species is easily separated from all other members of the Ranatra gracilis species group by the distinctive structure of the dorsal prothorax, with a pair (1 + 1) of small tubercles along the transverse sulcus between the anterior and posterior pronotal lobes, and another pair (1 + 1) of larger tubercles on the posterior projections of the posterior lobe; these latter tubercles also bear small, transverse pits across their tops.
Antennae extending to the apical side of the prothorax, first tarsal segment shorter than length of 2nd and 3rd together ...
Thorax: Prothorax quadrate, smaller than head; pterothorax trapezal or pentagonal bearing eight to eighteen posterior to lateral setae on pterothorax.
In male stag beetles with exaggerated mandibles as weapons, supportive traits of the weapons (head or prothorax) are also enlarged [17,18].
Gorochov (2015) created a new tribe, Cestrophorini, involving two other possibly related agraeciine genera, Cestrophorus and Acanthacara: these species share Erechthis' produced and acuminate fastigium verticis, but differ in other features (open eardrums, a shallow prothorax).
This new species is distinguishable from its closely related species Tettigonia viridissima (Linnaeus, 1758) by U" shaped markings at posterior sulcus of the pronotum and two thin spines on the ventral surface of the prothorax. Beside this, Tettigonia caudata (Charpentier, 1842) was constructed as new record for this region.
of the described species are: larval prothoracic spatula absent, collar segment with two very large papillae without setae in dorsal region; dorsal sclerotized plate occupying pro and mesothorax, lacking central papillae in mesothorax; pleural papillae very well developed in prothorax; terminal segment with four pairs of setose papillae (one setae long, one median and two short) not placed in lobes.