Furnish, William M., Zhou Zuren, and Brian F. Glenister. “Part L, Mollusca 4 (Revised), Vol. 2, Ch. 3, P. 108-157”. Treatise on Invertebrate Paleontology (January 1, 2009). Accessed April 27, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5273.