Lecompte, Marius, R. C. Moore, Dorothy Hill, H. J. Harrington, Eugenia Montanaro-Gallitelli, Frederick M. Bayer, and J. W. Wells. “Part F, Coelenterata, Ch. 2, P. 107-231”. Treatise on Invertebrate Paleontology (January 1, 1956). Accessed November 21, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5537.