Chalk Biozone 14 - Palaeohystrichophora infusorioides
Age: Latest Campanian.
Macrofaunal correlation: The uppermost B. mucronata Zone.
Definition: The interval between the FAD of Areoligera senonensis to the LAD of Palaeohystrichophora infusorioides.
Comments: An alternative index for the top of this biozone is the LAD of Senoniasphaera protrusa (see Costa & Davey, 1992; Wilkinson et al., 1993).
Lithostratigraphical correlation: The Portsdown Chalk Formation (Southern Province), the Rowe Chalk Formation (Northern Province) and the Mackerel Formation (North Sea).