Part E, Porifera (Revised), vol. 4 & 5, ch. 6, p. 321–416 - Webby, Barry D.; Wood, Stephan; Stearn, Colin W.; West, Ronald R.; Willenz, Philippe; DeBrenne, F.; Nestor, Heldur; Stock, Carl W.; Rigby, J. Keith; Kruse, P. D.; Vacelet, Jean; Zhuravlev, A. Yu (Treatise on Invertebrate Paleontology, 2015)