Furnish, William M., Zhou Zuren, and Brian F. Glenister. “Part L, Mollusca 4 (Revised), Vol. 2, Ch. 2, P. 52-107”. Treatise on Invertebrate Paleontology (January 1, 2009). Accessed April 2, 2025. https://journals.ku.edu/InvertebratePaleo/article/view/5272.