''Lobolytoceras'' is an extinct genus of ammonite in which only the inner whorls have large swollen ribs, later whorls have wrinkled growth lines which coarsen somewhat, near the aperture. The genus is known from the Lower Jurassic

Toarcian The Toarcian is, in the ICS' geologic timescale, an age and stage in the Early or Lower Jurassic. It spans the time between 182.7 Ma (million years ago) and 174.1 Ma. It follows the Pliensbachian and is followed by the Aalenian. The Toarc ...

of Europe. The type species ''L. siemensi'' (Denck) came from the Upper Toarcian of Germany.

References

Jurassic ammonites Fossils of Germany Toarcian life Ammonitida genera Lytoceratidae {{ammonitida-stub