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Guide to Amphora ovalis

(Kütz.) Kütz. 1844

Amphora Ovalis Guide
Credit: Josh Stepanek
  1. Dorsal fascia absent
  2. Proximal raphe ends dorsally deflected
  3. Raphe ledge distinct
  4. Dorsal striae interrupted by intercostal ribs
  5. Ventral striae uninterrupted

Valves semi-elliptic with a smoothly arched dorsal margin and slightly concave ventral margin. An uninterrupted raphe ledge is present. The striae are interrupted dorsally by intercostal ribs. Dorsal fascia absent, ventral fascia present and extending to the valve margin.