West, Ronald R. “Treatise Online, No. 22: Part E, Revised, Volume 4, Chapter 2C: Classification of the Fossil and Living Hypercalcified Chaetetid-Type Porifera (Demospongiae)”. Treatise Online (January 25, 2011). Accessed March 31, 2025. https://journals.ku.edu/treatiseonline/article/view/4139.