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Gryphaeidae Family Fossils

Class: Bivalvia-Oysters
Order: Ostreida
Family: Gryphaeidae
Common: Foam Oysters

Genus List: Ceratostreon, Exogyra, Gryphaea, Texigryphaea, Texigryphia
Formation List: Austin Chalk, Del Rio, Eagle Ford, Edwards Limestone
Age List: Albian, Cenomanian, Cenomanian Turonian, Santonian Coniacian

Texigryphaea washitaensis

Formation: Eagle Ford
Williamson County | 584
Age: Cenomanian Turonian
Texigryphaea washitaensis - None

Small Oyster

Formation: Austin Chalk
Williamson County | W1-682
Age: Santonian Coniacian
Small Oyster - None

Gryphaea Sp.

Formation: Austin Chalk
Williamson County | W1-683
Age: Santonian Coniacian
Gryphaea Sp. - None

Exogyra Ponderosa

Formation: Austin Chalk
Travis County | T3-2
Age: Santonian Coniacian
Exogyra Ponderosa - Pflugerville

Gryphaea aucella

Formation: Austin Chalk
Williamson County | 3
Age: Santonian Coniacian
Gryphaea aucella - Hutto

Exogyra tigrina

Formation: Austin Chalk
Travis County | 36
Age: Santonian Coniacian
Exogyra tigrina - Little Walnut Creek

Exogyra laeviuscula

Formation: Austin Chalk
Travis County | 75
Age: Santonian Coniacian
Exogyra laeviuscula - Travis County

Texigryphaea mucronata

Formation: Del Rio
Travis County | T2-69
Age: Cenomanian
Texigryphaea mucronata - Shoal Creek

Exogyra sp.

Formation: Del Rio
Edwards County | 72
Age: Cenomanian
Exogyra sp. - Edwards County

Texigryphaea roemeri

Formation: Del Rio
Travis County | 583
Age: Cenomanian
Texigryphaea roemeri - None

Exogyra arietina

Formation: Del Rio
Travis County | T2-13
Age: Cenomanian
Exogyra arietina - Travis County

Ceratostreon texana

Formation: Edwards Limestone
Kerr County | K1-14
Age: Albian
Ceratostreon texana - Hunt

Resources

Cretaceous Atlas Link

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