Type
Subzone
Age range
5.56–3.665 Ma
Pliocene
Piacenzian
Zanclean
Miocene
Messinian
Neodenticula koizumii - Neodenticula kamtschatica
Thalassiosira oestrupii
N. kamtschatica - Nitz. rolandii
5.65.55.45.35.25.15.04.94.84.74.64.54.44.34.24.14.03.93.83.73.6