Exogyra drakei Cragin, 1893

Remarks

• Collector:    Keith Minor

• Formation:  Washita Group, Grayson Formation

• Location:     Tarrant County, Texas

General Info

Synonyms (older names and misidentifications in the literature)

• 1893 Exogyra drakei Cragin

• 1919 Exogyra drakei Cragin; Böse

• 1928 Exogyra drakei Cragin; Adkins

• 1947 Exogyra drakei Cragin; Stanton

• 1955 Exogyra drakei Cragin; Perkins & Albritton

• 1960 Exogyra drakei Cragin; Perkins

Stratigraphic Occurrence

• Washita Group, Grayson Formation

• Washita Group, Del Rio Formation

• Washita Group, Mainstreet Formation

Age

• Exogyra drakei Cragin ranges from about the Mariella (Wintonia) brazoensis (Roemer) Zone to about the Graysonites adkinsi Young Zone, very Early Cenomanian Stage (~97 mya).

Geographic Occurrence (not an all-inclusive list)

• Bell County, Texas

• Denton County, Texas

• Johnson County, Texas

• McLennan County, Texas

• Tarrant County, Texas

• Travis County, Texas

• Williamson County, Texas

Remarks

         For identification and descriptions, see:

• Stanton, T. W.  1947.  Studies of Some Comanche Pelecypods and Gastropods.  Unites States Geological Survey Professional Paper 211, 32; plate 22, fig's 1, 2, 9 and 10; and plate 23, fig's 2, 3 and 5.