File:Ephydatia gutenbergiana Fig1.png
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English: Ephydatia gutenbergiana (Müller, Zahn, and Maidhof, 1982), Spongillida: Spongillidae; middle Eocene, Messel, Germany. A. Five oxeas as represented in the original description. B. Entire gemmule. C. Skeletal network (line-like arranged megascleres). D. Megascleres. E. Gemmuloscleres, the transitional forms of the series a (bottom, right) could point out an origin of the birotules from oxeas with shortened shaft. F. Corroded gemmuloscleres. G, H. Two illustrations of gemmuloscleres that has been shifted from the genus Spongilla to the genus Ephydatia; insert in H shows gemmulosclere in phase contrast. I. Megasclere, original material with corrosion marks that are characteristic for Messel. Modified from: A, Müller et al. (1982); B, F, Richter and Wuttke (1999); G, H, Richter and Wuttke (1995); I, Richter and Baszio (2009) |
| Date | |
| Source | Pronzato, R., Pisera, A., & Manconi, R. (2017). "Fossil freshwater sponges: taxonomy, geographic distribution, and critical review". Acta Palaeontologica Polonica 62 (3): 467-495.. |
| Author | Pronzato, Pisera, & Manconi, 2017 |
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