FIGURE 3. Mactra fuegiensis, A–B in Revision of the Magellanic Mactridae Lamarck, 1809 (Bivalvia: Heterodonta)

FIGURE 3. Mactra fuegiensis, A–B: hinge description according to the nomenclature developed by Bernard & Munier Chalmas, scale bar = 1 cm; C–D: Ultrastructure of the shell, C general aspect, ol: outer layer, il: inner layer; D: detail of the inner layer with the cross lamellar complex, scale bar = 100 µm.