Prothoracic gland
Encyclopedia
The prothoracic glands are either of a pair of endocrine glands located in the prothorax
of certain insects and regulating molting. They have a ectodermal origin and secrete ecdysteroids, such as ecdysone and 20-hydroxyecdysone.
Prothorax
The prothorax is the foremost of the three segments in the thorax of an insect, and bears the first pair of legs. Its principal sclerites are the pronotum , the prosternum , and the propleuron on each side. The prothorax never bears wings in extant insects, though some fossil groups possessed...
of certain insects and regulating molting. They have a ectodermal origin and secrete ecdysteroids, such as ecdysone and 20-hydroxyecdysone.