Pliensbachian

The Pliensbachian is roughly coeval with the Charmouthian regional stage of North America.

The Pliensbachian takes its name from the hamlet of Pliensbach in the community of Zell unter Aichelberg in the Swabian Alb, some 30 km east of Stuttgart in Germany.

The name was introduced into scientific literature by German palaeontologist Albert Oppel in 1858.

The base of the Pliensbachian is at the first appearances of the ammonite species Bifericeras donovani and genera Apoderoceras and Gleviceras.

[6] The top of the Pliensbachian (the base of the Toarcian Stage) is at the first appearance of ammonite genus Eodactylites.