Oldest record of freshwater sponges (Porifera: Spongillina) — spiculite finds in the Permo-Carboniferous of Europe

@article{Schindler2008OldestRO,
  title={Oldest record of freshwater sponges (Porifera: Spongillina) — spiculite finds in the Permo-Carboniferous of Europe},
  author={Thomas Schindler and Michael Wuttke and Markus J. Poschmann},
  journal={Pal{\"a}ontologische Zeitschrift},
  year={2008},
  volume={82},
  pages={373-384}
}
Up to now the oldest freshwater siliceous sponges are known from Jurassic deposits of Europe and North America. In this paper stratigraphically older Permo-Carboniferous freshwater siliceous sponges are reviewed/reported. Largely overlooked occurrences originate from the French Massif Central (Stefanian B), new discoveries come from the Saar-Nahe Basin (Stefanian C and Autunian) in south-west Germany. All Permo-Carboniferous finds originate from freshwater lake deposits situated hundreds of… 

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