mesothorax


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Related to mesothorax: mesothoracic

mesothorax

[¦me·zō′thȯ‚raks]
(invertebrate zoology)
The middle of three somites composing the thorax in insects.
References in periodicals archive ?
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.
Thorax brown, being darkest on top, and front spiracles and mesothorax as in Ph.
Pronotum long, not swollen above epomia, epomia itself strong but short, not reaching upper margin of pronotum; mesoscutum punctulate with setae, laterally with punctures finer and weaker; notauli present, but weak and shallow; mesopleuron mostly punctulate with setae; epicnemial carina rather sinuous, reaching anterior margin of mesopleuron, exceeding level of lower corner of pronotum; sternal part of mesothorax 1.
Flea bodies have three major parts: head (triangular in shape with club-shaped antennae and downward pointed mouthparts), thorax (contains three pairs of legs and has three distinct segments called the prothorax, mesothorax, and metathorax), and abdomen (contains 10 segments in adults with the caudal segment containing a dorsal sensilium that detects vibrations and temperature changes for host detection).
Spiracles: Located laterally in mesothorax and metathorax on papillae or tubercles, and on the first eight abdominal segments (Fig.
There is a relatively strongly supported sister group relationship between Hydrometridae and Hermatobatidae, which was diagnosed on the basis of upright egg deposition and a distinctly prolonged mesothorax (Damgaard, 2008b).
The medium-dorsal line is dark, continuous, with the borders a little lighter than the rest of the integument; part of the mesothorax extends continuously up to the ninth abdominal segment.
They described briefly the anterior margin of the sternum and the prosternal process, and use the term "closed coxal cavity" when the prothoracic sclerites expand behind the coxae, and "open coxal cavity" when the sclerite that closes behind the prothoracic coxal cavity is the mesothorax.