mesothorax

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mesothorax

[¦me·zō′thȯ‚raks]
(invertebrate zoology)
The middle of three somites composing the thorax in insects.
References in periodicals archive ?
Thorax darkish brown with grey microtomentum, except mesonotum glossy darkish brown with sparse black microtomentum; scutellum darkish brown with gray microtomentum.
2 black npl (the only black setae on mesonotum, other macrosetae weakly developed), general setae longish white.
Pronotum: Distinctly wider than long, lateral margins with a vertical projection, separated from mesonotum by a deep suture.
Mesonotum subrectangular, lateral margins armed with minute claviform-like setae, and distally with 1+1 tubercles directed backwards.
Femora extensively dark red-brown but with orange proximal parts 10 10 Large species (wing > 4mm); mesonotum fairly uniformly pruinose and lacking obvious apruinose bands medially; microtrichia of wing confined to distal margins distal cells (Fig.
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.
Center of mesonotum with quadrate yellow patch anteriorly, scutellum with median triangular yellow patch and pair of smaller marginal patches, scutoscutellar sulcus black brown.
Mesonotum blackish, silver pruinose except for large lateral areas and medial band which are somewhat brownish pruinose, all fine setae white; macrosetae weakly developed, orange (2 notopleurals, 1 supra-alar, 1 postalar), acrostichals not evident, dorsocentrals weakly developed posterior of transverse suture only.
Thorax -- Pronotum trapezoidal, widest at posterior margin, bearing widely dispersed sensilla on margins and shorter sensilla widely distributed discally, two obscure sternites, each posterior to a series of four small setae; meso- and metanota subequal in length; spiraclein pleural region of mesonotum near each anterolateral margin of tergite.
kunashirica Shatalkin, 1992 and Minettia (F) martineki Ceianu, 1991) on lower margin; mesonotum often with blackish gray pruinose stripes; scutellum often grayish white pruinosity on posterior margin; legs often black, rarely entirely yellow (in Minettia (F.
5): Ground colour wholly dark or to varying extent ochre-yellow on prothoracic parts, covered in thick light grey to olive-grey dusting, on middle third of mesonotum sometimes with a median brown vitta.