FIG. 3 in Upper Oligocene (Chattian) brachiopod fauna from the Aquitaine Basin, southwestern France and its paleoenvironmental implications

FIG. 3. — Megathiris detruncata (Gmelin, 1791), Upper Oligocene, Abesse: A, B, D, dorsal views of complete specimens, MNHN.F.A46491-A46493;C, inner view of ventral valve,MNHN.F.A46494;E, inner view of dorsal valve of young individual,MNHN.F.A46495; F-M, inner and oblique views of dorsal valves, and enlargements (H, M) to show details of septa and loop, MNHN.F.A46496-A46498. All SEM. Scale bars: A, H, 500 µm; B, D-G, K-M, 1 mm; C, I, J, 2 mm.