Reiswig, H.M. (2002). Class Hexactinellida Schmidt, 1870. pp 1201-1202 In Hooper, J.N.A. & van Soest, R.W.M. (ed.) Systema Porifera. A guide to the classification of sponges. 2 (Kluwer Academic/ Plenum Publishers: New York, Boston, Dordrecht, London, Moscow. ISBN 0-306-47260-0 (printed version).
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Reiswig, H.M.
2002
Class Hexactinellida Schmidt, 1870. pp 1201-1202 <i>In</i> Hooper, J.N.A. & van Soest, R.W.M. (ed.) Systema Porifera. A guide to the classification of sponges. 2 (Kluwer Academic/ Plenum Publishers: New York, Boston, Dordrecht, London, Moscow.
ISBN 0-306-47260-0 (printed version)
Publication
The PDF supplied here is a proof - NOT the definitive printed text - of a chapter of the Systema Porifera