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Fig. 6 | Zoological Letters

Fig. 6

From: Structure of a hinge joint with textured sliding surfaces in terrestrial isopods (Crustacea: Isopoda: Oniscidea)

Fig. 6

Ultrastructure of the contact surfaces in the propodus-dactylus joint. a Transmission electron micrograph of the propodal process inside the groove of the dactylus. The ridges on the propodal process are formed predominantly by the epicuticle (Ep), while its interior consists of the exocuticle (Ex). The epicuticle covering the groove of the dactylus is smooth and thicker. b Detail of the sliding surfaces of the propodus (top right) and the dactylus (bottom left). The denser outer epicuticle (Oe) covers the lighter inner epicuticle (Ie). The exocuticle (Ex) is visible in the innermost parts of the ridges on the propodus, while the ridges consist mostly of the epicuticle. The smooth epicuticle of the dactylus is thicker. Scale bars: 5 μm (a), 1 μm (b)

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Zoological Letters

ISSN: 2056-306X

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