Rastellum carinatum (Lamarck, 1806)

Remarks

• Collector:    Keith Minor
• Formation:  Washita Group, Georgetown Limestone
• Location:    Williamson County, TX

General Info

Synonyms (older names and misidentifications in the literature)

• Commonly called a "Denture Clam", although it's in the oyster family.
• 1806 Ostrea carinata Lamarck
• 1849 Ostrea carinata Lamarck; Roemer
• 1852 Ostrea carinata Lamarck; Roemer
• 1857 Ostrea carinata Lamarck; Conrad
• 1869 Ostrea carinata Lamarck; Coquand
• 1884 Ostrea carinata Lamarck; White
• 1901 Ostrea (Alectryonia) carinata Lamarck; Hill
• 1910 Ostrea (Alectryonia) carinata Lamarck; Böse
• 1910 Alectryonia (Arctostrea) carinata (Lamarck); Pervinquière
• 1911 Alectryonia carinata Lamarck; Whitney
• 1913 Ostrea diluviana Linnaeus (part); Woods
• 1920 Ostrea (Alectryonia) carinata Lamarck; Adkins
• 1920 Ostrea carinata Lamarck; Adkins and Winton
• 1925 Ostrea carinata Lamarck; Winton
• 1927 Ostrea carinata Lamarck; Bybee and Bullard
• 1928 Alectryonia (Arctostrea) sp. aff. A. carinata (Lamarck); Adkins
• 1947 Alectryonia (Arctostrea) carinata (Lamarck); Stanton
• 1947 Ostrea (Alectryonia) carinata Lamarck; Shimer and Shrock
• 1982 Ostrea (Alectryonia) carinatum (Lamarck); Offeman et al.

Stratigraphic Occurrence

• Uppermost Washita Group, Buda Formation of Central Texas
• Upper Washita Group, Grayson Formation of North Texas
• Upper Washita Group, Del Rio Formation of Central and West TX
• Upper Washita Group, Mainstreet Formation of North Texas
• Upper Washita Group, Pawpaw Formation of North Texas
• Upper Washita Group, Weno Formation of North Texas
• Lower Washita Group, Denton Formation of North Texas
• Lower Washita Group, Fort Worth Formation of North Texas
• Washita Group, Georgetown Formation of Central Texas
• Lower Chalk of England
• Cenomanian rocks of Germany
• Cenomanian rocks of France
• Cenomanian rocks of India

Age

• Rastellum carinatum (Lamarck) ranges from the Mortoniceras (Angolaites) lasswitzi (Young) zone to the Budaiceras hyatti (Shattuck) zone, middle Upper Albian to Lower Cenomanian Stage (~100 to 97 mya).

Geographic Occurrence (not an all-inclusive list)

• Bell County, TX
• Cooke County, TX
• Coryell County, TX
• Denton County, TX
• France
• Germany
• Grayson County, TX
• Hudspeth County, TX
• India
• McLennan County, TX
• Tarrant County, TX
• Travis County, TX

Remarks

         For identification and descriptions, see:

• Stanton, T. W.  1947.  Studies of Some Comanche Pelecypods and Gastropods.  United States Geological Survey Professional Paper 211.