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Van Soest, R.W.M.; Hooper, J.N.A. 2002. Suborder Petrosina Boury-Esnault & Van Beveren, 1982. Pp. 891-892. In Hooper, J. N. A. & Van Soest, R. W. M. (ed.) Systema Porifera. Guide to the classification of sponges. 1 (Kluwer Academic/ Plenum Publishers: New York, Boston, Dordrecht, London, Moscow).