The pronotum is a prominent plate-like structure that covers all or part of the thorax of some insects. The pronotum covers the dorsal surface of the thorax.
In some beetles the pronotum covers the whole thoracic region. In cockroaches the pronotum often covers just the first part of the thorax.
The American Cockroach (Periplaneta americana) is a common pest species found in the home. The pronotum is visible as the light brown area at the anterior (head) end of the insect. Photograph by Gary Alpert, used under GFDL
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