Gaster (1924, 1927, 1929, 1932, 1937, 1941, 1944) - Stauronema carteri Subzone

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Biostratigraphical correlation: Inferred to equate with all or part of the N. carcitanense Subzone.

Lithostratigraphical correlation: Equates with the basal part of the West Melbury Marly Chalk Formation.

Age: Earliest Cenomanian