Bayer, Frederick M., Horacio J. Harrington, John W. Wells, Erwin C. Stumm, Libbie H. Hyman, Raymond C. Moore, Hilbrand Boschma, Eugenia Montanaro-Gallitelli, Marius Lecompte, and Dorothy Hill. “Part F, Coelenterata, Complete Volume”. Treatise on Invertebrate Paleontology (January 1, 1956). Accessed May 4, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5541.