Foto de stock - Fossils of extinct Spongites species. Handcolored lithograph from Dr. F.A. Schmidt's Petrefactenbuch, published in Stuttgart, Germany, 1855 by Verlag von Krais & Hoffmann. Dr. Schmidt's Book of Petrification introduced fossils and palaeontology to both the specialist and general reader.

Imagen: Fossils of extinct Spongites species. Handcolored lithograph from Dr. F.A. Schmidt's Petrefactenbuch, published in Stuttgart, Germany.

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