Histological sections of <i>P</i>. <i>versicolor</i> Van der Vecht organ stained with toluidine blue.

<p><b>A)</b> Transversal section showing the two masses of tegumental glandular cells (GC) and the cuticular excretory area (between the black arrow heads). <b>B-D)</b> Magnifications showing a glandular cell with its excretory duct (black arrow in B), the funnell-shaped duct orifice (black arrow head in C) opening in the cuticular excretory area (CEA), and the transition region between the cuticular excretory area and the adjacent cuticle (AC). EC = Epithelial cells.