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Guide to Amphora bicapitata

M.H.Hohn and Hellerman 1966

Amphora Bicapitata Guide
Credit: Ian Bishop
  1. Ventral axial area large
  2. Axial plate present
  3. Dorsal striae coarse
  4. Apices protracted

Valves with a convex dorsal margin and linear to weakly convex ventral margin. Apices are protracted, capitate and deflected ventrally. Dorsal striae are coarse. Ventral striae are short. The axial area is minimal dorsally and expanded ventrally. An underlying partial axial plate is present at mid-valve.