Figure 4 from: Vittori M, Kostanjšek R, Žnidaršič N, Strus J (2012) Molting and cuticle deposition in the subterranean trichoniscid Titanethes albus (Crustacea, Isopoda). ZooKeys 176: 23-38. https://doi.org/10.3897/zookeys.176.2285

Figure 4 - Ultrastructure of anterior tergites in late premolt and intramolt. A early stage of exocuticle formation. The distal dense layer (dl) is deposited. The apical plasma membrane of epidermal cells forms finger-like extensions (fe). The Golgi apparatus (g) is well developed. B anterior tergite in late premolt. Several lamellae of the new exocuticle (ex) are deposited. Epidermal cells contain a well developed RER (r), numerous mitochondria (m) and small electron dense vesicles (sv) in their apical cytoplasm. The epicuticle (ep) with scales (sc) is fully formed. C the apical plasma membrane of an epidermal cell in late premolt forms numerous invaginations (arrow). Cytoplasmic extensions reach into pore canals (pc). D anterior tergite in intramolt. The new exocuticle is almost fully deposited. The apical cytoplasm of epidermal cells contains electron dense vesicles (sv), numerous mitochondria (m) and a well developed RER (r). Long cytoplasmic extensions reach into pore canals (pc). H oblique section through the apical surface of an epidermal cell in intramolt. Pore canals (pc) in the new cuticle contain cytoplasmic extensions of epidermal cells. Numerous short protrusions (p) of the apical plasma membrane with dense tips are visible. es ecdysial space. nu nucleus.