Type
Zone
Age range
193.8–192.8 Ma
Early Jurassic
Pliensbachian
Sinemurian
Echinoceras raricostatum
Oxynoticeras oxynotum
Asteroceras obtusum
193.8193.8193.7193.7193.6193.6193.5193.4193.4193.3193.3193.3193.2193.2193.1193.1193.0192.9192.9192.8192.8