Gervillaria Temporal range: Triassic - Cretaceous | |
---|---|
Scientific classification | |
Kingdom: | Animalia |
Phylum: | Mollusca |
Class: | Bivalvia |
Order: | Pteriida |
Family: | † Bakevelliidae |
Genus: | †Gervillaria Cox, 1955 |
Gervillaria is an extinct genus of saltwater clams, marine bivalve molluscs that lived from the Triassic to the Cretaceous in Asia, Europe, North America, and South America.
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Bakevelliidae is an extinct family of prehistoric bivalves that lived from the Late Mississippian until the Middle Eocene. Bakevelliidae species are found worldwide, excluding Antarctica. Living a stationary life attached to substrate in marine and brackish environments, they formed shells of an aragonite composition with a low amount of magnesium calcite. The family was named by King in 1850. At least one genus in the family, Hoernesia, has a notably twisted commissure join.
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