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Hooper, J.N.A.; van Soest, R.W.M.; Debrenne, F. (2002). Phylum Porifera Grant, 1826, <B><I>in</I></B>: Hooper, J.N.A.; van Soest, R.W.M. (Ed.) (2002). <i>Systema Porifera: a guide to the classification of sponges.</i> pp. 9-14