FIGURE 17 in Revision of the Bivalvia from the Upper Jurassic Reuchenette Formation, Northwest Switzerland—Ostreoidea

FIGURE 17. Praeexogyra dubiensis (Contejean, 1859). 1–7. MC-27-E-112, lectotype, designated herein, Oxfordian, Bussurel near Montbéliard, France. 1. LV lateral, scanned from Contejean (1859, pl. 21, fig. 4); 2, LV interior, scanned from Contejean (1859, pl. 21, fig. 5); 3, LV lateral, with cylindrical attachment scar, probably from an algal stem; 4, interior; 5, dorsal view; 6, anterior view; 7, magnified portion of dorsal region. Scale bars 5 mm.