Abstract
This paper describes the ultrastructure of the site of mechanical stimulation of the cockroach campaniform sensillum. The cuticular “cap” of the sensillum has been studied by scanning electron microscopy (SEM) and high voltage transmission electron microscopy (HVEM). The SEM was used to study the upper and lower surfaces of the extracellular chitinous cap. The internal composition of the cap was analyzed by HVEM. Two significant structural features were observed: (1) the dome of the cap contains a reinforcing ring, the “cuticular collar,” as an integral part of its substructure; and (2) the dome of the cap is firmly attached to the surrounding exoskeleton at two specific points located at each end of the oval dome. The functional implications of these two structures is discussed.
Published Version
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