Exogyra

Exogyra
Temporal range: Jurassic–Cretaceous
Exogyra flabellata
(Owl Creek Formation, Late Cretaceous, Mississippi)
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Bivalvia
Order: Ostreida
Family: Gryphaeidae
Genus: †Exogyra
Say, 1820
Species

See text

Exogyra is an extinct genus of fossil marine oysters in the family Gryphaeidae, the foam oysters or honeycomb oysters.[1] These bivalves were cemented by the more cupped left valve. The right valve is flatter, and the beak is curved to one side. Exogyra lived on solid substrates in warm seas[citation needed] during the Jurassic and Cretaceous periods.[2]

  1. ^ "Evolution of Exogyra plexa". Archived from the original on 26 March 2008. Retrieved 25 March 2008.
  2. ^ Cite error: The named reference FWExogyra was invoked but never defined (see the help page).