Figure 3 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 3 - Ultrastructure of anterior tergites in early premolt. A apolysis. The apical surface of the epidermal cell (e) is detached from the old cuticle (oc), but the ecdysial space is narrow. The apical plasma membrane of epidermal cells forms short protrusions (p) with electron dense tips. B the ecdysial space in early premolt. A sheet of fibrous and granular material (s) is located in the distal part of the ecdysial space (es). C section through the apical surface of an epidermal cell (e) in early premolt. Gaps (arrowheads) are present in the newly formed epicuticle (ep) that is formed over short protrusions (p) of the apical plasma membrane. A developing epicuticular scale (sc) is visible. D oblique section through the apical surface of an epidermal cell in early premolt. Gaps (arrowheads) in the newly deposited epicuticle (ep) appear to be perforations. E the epidermis in early premolt. Epidermal cells (e) contain numerous mitochondria (m) and a well developed RER (r). Scales (sc) are forming around elongated projections of the apical plasma membrane (cp)