FIGURE 7. Mactrotoma fragilis (Gmelin, 1791), A–B: hinge description by using the nomenclature developed by Bernard and Munier Chalmas, scale bar = 1 cm, A: RV, B: LV; C–E: Ultrastructure of the shell, C: general aspect of radial section of a LV from close to hinge to ventral margin scale bar = 100 µm, D: detail of the outer layer with cross lamella structure, scale bar = 50 µm, E: detail of inner layer with the cross lamellar complex, scale bar = 20 µm.

Published as part of Signorelli, Javier H. & Pastorino, Guido, 2012, Taxonomic revision of Brazilian Mactridae Lamarck, 1809 (Bivalvia: Cardiida), pp. 30-53 in Zootaxa 3245 on page 41, DOI: 10.11646/zootaxa.3245.1.2, http://zenodo.org/record/6544861