Oyster fossil (Gryphaea arcuata),found worldwide from the Upper Triassic to the Upper Jurassic. Gryphaea was a sedentary oyster with very unequal valves; one is large and curved,the other,small and almost flat. It grew to 160 mm long,and lived in shallow water | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Biophoto Associates |
Taille de l’image : | 5148 px × 3393 px |
Model Release : | Non requis |
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