Image: Rudist bivalve, Sphaerulites sp.

Rudist bivalve, Sphaerulites sp.

Rudist bivalve (mollusc). France, Late Jurassic, 150 million years ago.

Illustrator:
Anne Musser
Rights:
© Australian Museum

Additional information

Rudist bivalves were the main reef-builders in the Jurassic and Cretaceous. Modern bivalves, like oysters and clams, are still common in shallow marine areas today.

Last Updated:

Tags rudist, bivalves, reefs, Late Jurassic, dinosaur world,