Abstract
From an analysis of the fauna from an Oxfordian reef near Auerbach in Oberpfalz R. Meyer and L. Übelacker found a great number of irregularly shaped clumps (Meyer et al. 1987). These clumps were determined to be basal fragments of Tremadictyon radicatum (Fig. 1). This large siliceous sponge is the only described form from the Upper Jurassic which built root knots to anchor itself in soft sediment. This species may be one of the hypothetical “pioneer sponges” which contributed to the establishment of new reefs. The following description supports this supposition.
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Müller, W. (1991). Observations on the Jurassic Hexactinellid Sponge Tremadictyon radicatum (Quenstedt). In: Reitner, J., Keupp, H. (eds) Fossil and Recent Sponges. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-75656-6_4
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DOI: https://doi.org/10.1007/978-3-642-75656-6_4
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