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Curator’s Choice
Form and Function:
A Tribute to Adolf Seilacher
Rudists as Bivalvian Dinosaurs
Requienia ammonia Nathorst
Early Cretaceous, France
YPM.35724
| Requienia was not permanently attached, but lived in soft-bottom sediments. Unlike in the thin-shelled Toucasia, the larger valve was thicker to provide weight to anchor it in the sediment. |