Do you see any obvious red fkag with this one? It is described as Zanthopsis dufouri, 8×7×5 cm, Eocene (47.8-56 m/y), from the French region of Aude. It llooks very nice, but what both attracts and puzzles me it that it appears ti be "sitting" onto its matrix, like a jewel on a silk cushion. What do you thing? An excellent prep work, or...?
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