The ultrastructure of cell junctions in the epidermis of tergites of a P. scaber adult animal A semithin section of the tergite: The integument of adult animals consists of flattened epidermal cells covered by a thick cuticle B ultrastructure of an AJ and a pleated SJ with clearly resolved septa. SJs in adult animals are in the form of long continuous arrays of septa C an AJ in the subapical region of lateral cell membranes and a pleated SJ situated basally to the AJ. Further along the lateral membranes a close apposition of membranes is discernible (asterisk). Abbreviations: AJ: adherens junction; AM: apical membrane; CU: cuticle; E: epidermis; SJ: septate junction. Scale bars: 20 µm (A); 500 nm (B, C).