Gryphaea
Sign in to savethumb|350x350px|Silicified Gryphaea sp. from the Lower Jurassic. Le Liquier, Aveyron, France. Max Rouger collection. Gryphaea, one of the genera known as '''devil's toenails''', is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae.
Article
3 sectionsContents
- Selected species
- References
- External links
thumb|350x350px|Silicified Gryphaea sp. from the Lower Jurassic. Le Liquier, Aveyron, France. Max Rouger collection. Gryphaea, one of the genera known as '''devil's toenails', is a genus of extinct oysters, marine bivalve mollusks in the family Gryphaeidae.
These fossils range from the Triassic period to the middle Paleogene period, but are mostly restricted to the Triassic and Jurassic. They are particularly common in many parts of Britain.