Type
Zone
Age range
432.3–431.8 Ma
Wenlock
Sheinwoodian
Kockelella walliseri
Ozarkodina sagitta rhenana
Kockelella ranuliformis
432.32432.30432.28432.26432.24432.22432.20432.18432.16432.14432.12432.10432.08432.06432.04432.02432.00431.98431.96431.94431.92431.90431.88431.86431.84431.82431.80431.78