| Phymosoma Temporal range: Cretaceous-Eocene | |
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| Phymosoma granulosum fossil, Geological museum, Copenhagen | |
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| Genus: | Phymosoma |
Phymosoma is an extinct genus of echinoids that lived from the Cretaceous to the Eocene. Its remains have been found in Asia, Europe, and North America.
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The infraclassis Carinacea includes most living species of regular sea urchin, and fossil forms going back as far as the Triassic.
The Kristianstad Basin is a Cretaceous-age structural basin and geological formation in northeastern Skåne, the southernmost province of Sweden. The basin extends from Hanöbukten, a bay in the Baltic Sea, in the east to the town of Hässleholm in the west and ends with the two horsts Linderödsåsen and Nävlingeåsen in the south. The basin's northern boundary is more diffuse and there are several outlying portions of Cretaceous-age sediments. During the Cretaceous, the region was a shallow subtropical to temperate inland sea and archipelago.