metathorax

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metathorax

[¦med·ə′thȯr‚aks]
(invertebrate zoology)
Posterior segment of the thorax in insects.
References in periodicals archive ?
Posterior margin of metanotum with glandular thickening; metanotal gland present, cluster of bristles seems to form a unique cluster on median region, the projections short (Fig.
5x as wide as long (35/10), 4x across lateral projections (40/ 10); lateral margins with a posterolaterally directed projection; median ridge fused to and continuing on metanotum, laterally with ovate callosities, posterior margin convex, separated from metanotum by a laterally distinct groove except on median ridge.
Metanotum rectangular, lateral surfaces smooth; distally with 1+1 tubercles directed backwards.
Metanotum without posterodorsal suture; width of ocularium less than or subequal to diameter of first antennal segment.
Scutellum and metanotum shiny, smooth, weakly punctate, without sculpture among punctae.
Notauli indistinct, metanotum smooth, propodeum smooth with a longitudinal carina diverging distally, pronotum with longitudinal carina, mesopleuron and metapleuron smooth and shiny.
Mesonotum and metanotum short, transverse, with fairly long setigerous tubercles laterally, posterior margins thickened, forming transverse carinae.
Mafulemesa schuhi differs from the type species in its wing and body colouration, the male genitalia (straighter, less swollen paramere, relatively shorter phallothecal sclerite), and the lack of rugosity on the ventral surface of the mesonotum and metanotum.
The second pair of spiracles occurs on the anterior margin of the metapleuron near the metanotum.
1), posterior margin gently sinuate, scutellum triangular with slightly raised marginal carina (Figs 1, 6A), metanotum posteriorly with prominent paired sclerites (Fig.
Dorsum with numerous very small short rounded papillae scattered; the metanotum with a pair of dorsal tubercles, the first abdominal segment with median tubercles, the thoracic tracheal fold not distinct, with the cleft deeper and narrowed distally multipori (Takahashi) * --.