(Riedel and Sanfilippo, 1978a)
The top of the zone is defined by the morphotypic last appearance of Theocyrtis annosa and is coincident with the lower limit of the Stichocorys delmontensis Zone.
Events included in the zone are:
- The lower limit of the zone is approximately synchronous with Bm Calocycletta serrata; Bm Calocycletta virginis; Tm Artophormis gracilis; Bm Botryostrobus miralestensis
The base of the zone is defined by the morphotypic first appearance of Cyrtocapsella tetrapera and is coincident with the upper limit of the Lychnocanoma elongata Zone.
Reference slides R 27.1, R 27.2 and R 27.3 from Sample 85-573B-17-3, 60-62 cm.