L. William Stephenson, ?Larger invertebrate fossils of the Woodbine Formation (Cenomanian) of Texas?, Geological Survey Professional Paper, vol. 242, pp. 1-226, 1952.

F. T.  Fürsich and Werner, W., ?The Upper Jurassic Bivalvia of Portugal. Part 2. Pteriomorphia (Pterioida exclusive Ostreina)?, Comunicações dos Serviços Geológicos de Portugal, vol. 74, pp. 105-164, Submitted.

L. William Stephenson, ?Larger invertebrate fossils of the Woodbine Formation (Cenomanian) of Texas?, Geological Survey Professional Paper, vol. 242, pp. 1-226, 1952.