'Lithistid' Demospongiae. Pp. 299-301. - Pisera, A.; Lévi, C. (In: Hooper, J.N.A. & Van Soest, R.W.M. (2002 [2004]) Systema Porifera. A guide to the classification of sponges. 1 (Kluwer Academic/ Plenum Publishers) NY, 2002)