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Agerostrea falcata Morton, 1830
Remarks
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Collector: Ralph Johnson (M.A.P.S. collection)
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Formation: Matawan Group, Merchantville Formation
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Location: New Castle County, DE
General Info
Synonyms (older names and misidentifications in the literature)
- 1830 Ostrea falcata Morton
- 1868 Ostrea larva Lamarck; Cook
- 1886 Ostrea larva Lamarck; Whitfield (in part)
- 1907 Ostrea falcata Morton; Weller
- 1916 Ostrea larva var. falcata Morton; Gardner
- 1923 Ostrea falcata Morton; Stephenson
- 1926 Ostrea falcata Morton; Wade
- 1941 Ostrea falcata Morton; Stephenson
- 1923 Ostrea falcata Morton; Groot, Organist, and Richards
- 1982 Agerostrea falcata (Morton); Offeman et al.
- 1989 Agerostrea falcata (Morton); Finsley
Stratigraphic Occurrence
- Monmouth Group, Navesink Formation of New Jersey
- Monmouth Group, Mount Laurel Formation of New Jersey
- Matawan Group, Marshalltown Formation of New Jersey and Delaware
- Navarro Group, Neylandville Formation of North Texas
- Navarro Group, Saratoga Formation (?) of South–West Arkansas
- Navarro Group, Arkadelphia Formation of South–West Arkansas
- Lower Taylor Group, Sprinkle Formation of Central Texas
- Upper Selma Group, Demopolis Chalk of Mississippi and Tennessee
- Middle Selma Group, Annona Chalk of Mississippi
- Selma Group, Coffee Sand of Mississippi
- Ripley Formation of Mississippi
- Prairie Bluff Formation of Mississippi
- Black Creek Formation of North Carolina
Age
- Agerostrea falcata (Morton) ranges from about the Menabites (Delawarella) sabinalensis Young zone to about the Nostoceras (Nostoceras) draconis Stephensonzone (upper Lower Campanian to lower Maastrichtian, ~81–69 mya).
- It may well range into the Middle Maastrichtian Stage.
Geographic Occurrence (not an all-inclusive list)
- Alabama (counties ?)
- Alcorn County, MS
- Bladen County, NC
- Chickasaw County, MS
- Clay County, MS
- Dallas County, AL
- Hempstead County, AR
- Kemper County, MS
- Lamar County, TX
- Lee County, MS
- Maryland (no county given)
- McNairy County, TN
- Monmouth County, NJ
- New Castle County, DE
- New Hanover County, NC
- Noxube County, MS
- Oktibbeha County, MS
- Pitt County, NC
- Prentiss County, MS
- South Carolina (no county given)*
- Stewart County, GA
- Travis County, TX
Remarks
For identification and descriptions, see:
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