Oosterella is an extinct ammonoid cephalopod genus belonging to the family Oosterellidae.

These fast-moving nektonic carnivores [1] lived during the Cretaceous, from the upper Valanginian age to the lower Hauterivian age.

[2] [1] Fossils of species within this genus have been found in the Cretaceous sediments of Argentina, Austria, Colombia, Czech Republic, France, Hungary, Italy, Mexico, Morocco, Romania and Slovakia.

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