Histological and ultrastructural aspects of the brindley's glands of panstrongylus megistus burmeister 1835 hemiptera reduviidae

Santos-Mallet, J.R.D.; Souza, W.D.

Memorias do Instituto Oswaldo Cruz 85(2): 141-152


ISSN/ISBN: 0074-0276
Accession: 007402660

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The Brindley's glands of Panstrongylus megistus were studied under the anatomic, histologic and ultrastructural point of view. These glands located in the insect's methathorax are paired and have an opening near the third pair of the feet. Beside this aperture, there are evaporation areas. Shape, size and aspect of the gland vary according to the feeding status. The glands are composed by a tubular part corresponding to the duct and a sack-like portion corresponding to the secretory part. By electron microscopy we observed that the basal part of the epithelium has many interdigitations associated with mitochondria. On the apical surface where epicuticular foldings are located an electronlucent space is often seen. The glands are composed of the following elements: 1) superficial epithelial cells, located just below the apical surface foldings; 2) secretory cells; which are long and have an intracellular canalicule which changes according to the functional state of the cell; 3) a collecting duct connected to the secretory cells and covered with an epicuticle, reaching up to the gland's lumen; and 4) cells around the duct.