Superfamily Ostreoidea Rank Species | Order Pterioidea | |
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Similar Gryphaea, Gryphaea dilatata, Gryphaeidae, Plagiostoma, Exogyra | ||
Gryphaea arcuata is an extinct species of foam oyster, a bivalve mollusk in the family Gryphaeidae from the Early Jurassic of Europe.
It is commonly referred to in English folklore as the 'Devils Toenail' due to its supposed resemblance to the devil's 'cloven hoof'.
References
Gryphaea arcuata Wikipedia(Text) CC BY-SA