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Gryphaea | |
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Gryphaea arcuata from the Jurassic of England | |
Scientific classification | |
Unrecognized taxon (fix): | Gryphaea |
Gryphaea (the Devil's toenail) is a genus of extinct oysters which were once very common. Their fossils are common on the Jurassic Coast in southern England, and in the margins of the old Sundance Sea in the United States. It is a marine bivalve mollusc in the family Gryphaeidae.