TY - CHAP A1 - Rützler, K. JO - In: Hooper, J.N.A.; Van Soest, R.W.M. (eds) Systema Porifera. A guide to the classification of sponges. 2 volumes N1 - The PDF supplied here is a proof - NOT the definitive printed text - of a chapter of the Systema Porifera C1 - Kluwer Academic/ Plenum Publishers, New York, 1708 + xvliii. ISBN 0-306-47260-0 (printed version) TI - Family Spirastrellidae Ridley & Dendy, 1886. Pp. 220-223 UR - https://www.marinespecies.org/porifera/porifera.php?p=sourcedetails&id=8985 PY - 2002 Y2 - 2024-03-28 ER -