Fig. 6

Ultrastructure of P. duboscqi SG showing the secretory cells, respectively, of type I (a), type II (b) and type III (c). Several vesicles are close to the basal lamina of all cell types (black arrows). Also, observe the aspect of the large cytoplasmic projections over the cell surfaces presenting a dark staining (white arrows). Abbreviations: Sr, saliva reservoir; N, nuclei; V, cytoplasmic vesicles. Scale-bars: 2.5 µm