Vacelet, Jean, and Philippe Willenz. “Part E, Porifera (Revised), Vol. 4 & 5, Ch. 1, P. 1–80”. Treatise on Invertebrate Paleontology (January 1, 2015). Accessed December 10, 2024. https://journals.ku.edu/InvertebratePaleo/article/view/5752.