(Moore, 1971, emend. Riedel and Sanfilippo, 1978a)
The top of the zone is defined by the morphotypic first appearance of Cryptocarpium azyx and is coincident with the lower limit of the Cryptocarpium azyx Zone.
Events included in the zone are:
- Tm Spongatractus pachystylus
- Bm Thyrsocyrtis bromia
- Bm Thyrsocyrtis tetracantha; Bm Dictyoprora pirum; Tm Theocotylissa ficus
- Tm Sethochytris triconiscus
- Bm Dictyoprora armadillo
- The lower limit of the zone is approximately synchronous with Lithocyclia ocellus group -> Lithocyclia aristotelis group
The base of the zone is defined by the morphotypic first appearance of Podocyrtis goetheana and is coincident with the upper limit of the Podocyrtis chalara Zone.
Reference slides R 39.1, R 39.2 and R 39.3 from Sample 16-162-6-2, 126-134 cm.