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Rützler, K. (2002 [2004]). Family Placospongiidae Gray, 1867. Pp. 196-200. In: Hooper, J.N.A.; Van Soest, R.W.M. (eds) Systema Porifera. A guide to the classification of sponges. Kluwer Academic/ Plenum Publishers, New York, 1708 + xvliii. ISBN 978-1-4615-0747-5 (eBook electronic version).
Rützler, K. (2002 [2004]). Family Placospongiidae Gray, 1867. Pp. 196-200. In: Hooper, J.N.A.; Van Soest, R.W.M. (eds) Systema Porifera. A guide to the classification of sponges. Kluwer Academic/ Plenum Publishers, New York, 1708 + xvliii. ISBN 978-1-4615-0747-5 (eBook electronic version).
