Reiswig, H.M. (2002). Order Hexactinosida Schrammen, 1903. pp. 1281. In: Hooper, J.N.A. & van Soest, R.W.M. (ed.) Systema Porifera. A guide to the classification of sponges (2 volumes). Kluwer Academic/ Plenum, NY 1708 + xvliii. ISBN 0-306-47260-0 (printed version).
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Reiswig, H.M.
2002
Order Hexactinosida Schrammen, 1903. pp. 1281. <i>In</i>: Hooper, J.N.A. & van Soest, R.W.M. (ed.) <i>Systema Porifera. A guide to the classification of sponges</i> (2 volumes). Kluwer Academic/ Plenum, NY 1708 + xvliii. ISBN 0-306-47260-0 (printed version).
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The PDF supplied here is a proof - NOT the definitive printed text - of a chapter of the Systema Porifera