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

R. E.  Akers and Akers, T. J., ?Texas Cretaceous bivalves 2. Descriptions and illustrations of all named Texas genera and species?, Texas Paleontology Series, vol. 7, p. ???, 2002.

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