FIGURE 16 in Revision of the Bivalvia from the Upper Jurassic Reuchenette Formation, Northwest Switzerland—Ostreoidea

FIGURE 16. Helvetostrea? caprina (Rollier, 1917) and H. oxfordiana (Rollier, 1917). 1. "Ostrea" caprina, refigured from Rollier (1917, pl. 39, fig. 2), LV, from Gösgen (Aargau), NE Switzerland (Geissberg Member, Late Oxfordian). 2–6.?Helvetostrea n. gen. caprina, same specimen as Fig. 16.1, here designated as lectotype, coll. ETHZ, Ve.S. 4563: 2, LV interior, hinge area poorly drawn in the original figure (compare Fig. 16.1); 3, LV, lateral; 4, RV, interior; 5, RV, lateral; ETH Zürich, photos by Dr. Pika-Biolzi (Zürich), specimen not whitened; 6. Lectotype, anterolateral (both valves re-articulated), refigured from Rollier (1917, pl. 40, fig. 2b). 7–9. Helvetostrea oxfordiana. Figured bivalved type specimen of Ostrea oxfordiana, cf. Rollier 1917, pl. 40, fig. 1a–c, ETHZ Ve.S. 5146, Klein-Kembs (Kleinkems) near Lörrach (Baden- Württemberg), Germany ("Terrain à Chailles", Lower Oxfordian, Cardioceras cordatum Zone: 7, LV, interior; 8, LV ventral view; 9, RV lateral. Scale bars 10 mm.