Exogyra collection of C. Newsom

Collected from Texas, Alabama, New Jersey, Utah and Nevada

Name Age Stage Formation Member Comment
Exogyra costata costata
Say, 1820
Cretaceous Maestrichtian Corsicana Marl - -
Exogyra costata spinifera
Stephenson, 1941
Cretaceous Maestrichtian Peedee upper Found in North Carolina
Exogyra cancellata
Stephenson, 1914
Cretaceous Lower Maestrichtian Demopolis Chalk - Demopolis Type Locality
Exogyra ponderosa ponderosa
Roemer 1849
Cretaceous Campanian Taylor Sprinkle Clay -
Exogyra tigrina
Stephenson
Cretaceous Santonian Austin Chalk Dessau Chalk Found a few cm above the E. laeviuscula layer
Exogyra laeviuscula
Roemer
Cretaceous Middle Santonian Austin Chalk Dessau Chalk Found a few cm above the E. ponderosa erraticosta
Exogyra ponderosa erraticostata
Stephenson, 1914
Cretaceous Middle Santonian Austin Chalk Dessau Chalk Found about 1.5m below Burditt/Dessau contact
Exogyra upatoiensis
Stephenson, 1914
Cretaceous Santonian Eutaw Tombigbee Sand upper part of formation
Exogyra aquilliana
Stephenson
Cretaceous Uppermost Cenomanian Woodbine - found with E. columbella
no photo yet
Exogyra columbella levis
Meek
Cretaceous Uppermost Cenomanian Woodbine - found with E. aquilliana
(photo blurred)
Exogyra whitneyi
Bose
Cretaceous Upper Cenomanian Grayson Upper Marl Found within 1m of Grayson/Woodbine contact
Exogyra clarki
Shattuck
Cretaceous Upper Cenomanian Grayson Upper marl Found within 1m of Grayson/Woodbine contact
Exogyra drakei
Cragin
Cretaceous Upper Cenomanian Grayson Upper marl Found within 1m of Grayson/Woodbine contact
Exogyra olisiponensis
Sharpe
Cretaceous Middle Cenomanian Dakota Sandstone Gryphaea -
Exogyra plexa
Cragin
Cretaceous Lower Cenomanian Kiamichi - -
Exogyra paupercula
Cragin
Cretaceous Lower Aptian Glen Rose Unit 4
(Barnes, Austin West quad)
-
Exogyra guadalupe
n. sp.

-
Cretaceous Lower Aptian Glen Rose Unit 2
(Barnes, Austin West quad)
New Species
not E. aquila
or
E. quitmanensis
Exogyra aquila
(Brongniart)
Cretaceous Upper Aptian Hensell Sand - Found within 1m of Cow Creek/Hensell contact
Exogyra cartledgei
(?)
Cretaceous Upper Aptian Glen Rose Basal 15m Need photo

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