File:Lutetiospongilla heili Fig1.png
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English: Lutetiospongilla heili Richter & Wuttke, 1999, Spongillida: Spongillidae; Eocene, Messel oil shale, Germany. A. Holotype, SMF ME I 5143, carpet of closely bound gemmules with evident lumina and large radial gemmuloscleres. B. Single gemmular theca, firmly sessile on the surface of a woody plant, oblique view. Gemmular lumen (top right). C. Broken gemmule in the sediment with gemmular theca mainly formed of small more or less radially arranged gemmuloscleres. D. Broken-up lumen of a gemmule. Numerous mixed inner ends of large and small gemmuloscleres. E. Megasclere and large gemmuloscleres. F. Scattered sample with numerous huge gemmuloscleres. G. Megascleres originally finely spiny. Here, the pores are further apart and are narrower than in H. H. Gemmuloscleres from Messel with corrosion canals of original dense spines. SEM images. Modified from: A–D, Richter and Wuttke (1999); E, F, Richter and Baszio (2009); G, H, Richter and Baszio (2000) |
| 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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