Pycnodonte (Phygraea) vesiculare mellaheni
On the variability of the Campanian Pycnodonte (Phygraea) vesiculare (Lamarck). Neues Jahrbuch fuer Geologie und Palaeontologie Monatshefte, 1, Januar 1998: 42-54. 50 [Zoological Record Volume 135]