West, Ronald R., et al. “Treatise Online No. 58: Part E, Revised, Volume 4, Chapter 4A–B: Hypercalcified Extant and Fossil Chaetetid-Type and Post-Devonian Stromatoporoid-Type Demospongiae: Systematic Descriptions”. Treatise Online, Feb. 2013, https://doi.org/10.17161/to.v0i0.4447.