(Sanfilippo and Riedel in Saunders et al., 1985)
The top of the zone is defined by the morphotypic first appearance of Calocyclas bandyca and is coincident with the lower limit of the Calocyclas bandyca Zone.
Events included in this zone are:
- Calocyclas hispida -> Calocyclas turris
The base of the zone is defined by the morphotypic first appearance of Cryptocarpium azyx and is coincident with the upper limit of the Podocyrtis goetheana Zone.
Reference slides R 38.1, R 38.2 and R 38.3 from Sample 8-69A-10-6, 130-132 cm.