West, R. R.; Vacelet, J.; Hartman, W. . . . . . . . . . . D.; Wood, R. A. Part E, Porifera (Revised), Vol. 4 & 5, Ch. 4, P. 209–292. InvertebratePaleo 2015. https://doi.org/10.17161/dt.v0i.5755.