Teichert, Curt, R. C. Moore, D. E. Nodine Zeller, W. M. Furnish, H. B. Stenzel, Bernhard Kummel, and Brian F. Glenister. 1964. “Part K, Mollusca 3, Complete Volume”. Treatise on Invertebrate Paleontology, January. https://doi.org/10.17161/dt.v0i0.5262.