Crassostrea glabra Meek and Hayden, 1857

Remarks

• Collector:    Dale Chadwick

• Formation:  Montana Group, Pierre Shale, Rocky Ridge Member

• Location:     Larimer County, CO

General Info

Synonyms (older names and misidentifications in the literature)

• 1857 Ostrea glabra Meek and Hayden
• 1876 Ostrea glabra Meek and Hayden
• 1913 Ostrea glabra Meek and Hayden; Bose
• 1932 Ostrea glabra Meek and Hayden; Adkins
• 1944 Ostrea glabra Meek and Hayden; Shimer and Shrock
• 1975 Crassostrea glabra Meek and Hayden; Kauffman
• 1982 Crassostrea glabra Meek and Hayden; Offeman et al.
• 2002 Crassostrea glabra Meek and Hayden; Akers and Akers

Stratigraphic Occurrence

• Montana Group, Pierre Formation, Rocky Ridge Member of Colorado
• Montana Group, Pierre Formation of Wyoming
• Navarro Group, Nacatoch Formation of north Texas
• Navarro Group, Escondido Formation of south Texas
• Navarro Group, Escondido Formation of Coahuila, Mexico

Age

• Crassostrea glabra Meek and Hayden occurs in the lower Maastrichtian rocks of the Western Interior and Gulf Coast (~71 mya).

Geographic Occurrence (not an all-inclusive list)

• Coahuila, Mexico
• Larimer County, CO
• Navarro County, TX
• Uvalde County, TX
• Wyoming (county ?)

Remarks

         For identification and descriptions, see:

• Meek, F. B.; Hayden, F. V.  1857.  Descriptions of New Fossil Species of Mollusca Collected by Dr. F. V. Hayden, in Nebraska Territory; Together wit a Complete Catalog of all the Remains of Invertebrata Hitherto Described and Identified from the Cretaceous and Tertiary Formations of that Region.  Proceedings of the Academy of Natural Sciences of Philadelphia 8, 265–286.