Systema Porifera: A Guide to the Classification of Sponges
xlviii + 1708
Kluwer Academic / Plenum Publishers
New York, New York, USA
Published in two volumes: Volume 1 - Introductions and Demospongiae; Volume 2 - Calcarea, Hexactinellida, Sphinctozoa, Archaeocyatha, unrecognizable taxa, and Index of higher taxa
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