Stearn, Colin W., and Barry D. Webby. “Part E, Porifera (Revised), Vol. 4 & 5, Ch. 12, P. 781–844”. Treatise on Invertebrate Paleontology (January 1, 2015). Accessed November 21, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5763.