Lobolytoceras

Lobolytoceras is an extinct genus of ammonite^[2] 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 of Europe. The type species L. siemensi (Denck) came from the Upper Toarcian of Germany.^[2]

Lobolytoceras Temporal range: Toarcian[1] PreꞒ Ꞓ O S D C P T J K Pg N
Lobolytoceras siemensi
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Family:	†Lytoceratidae
Subfamily:	†Alocolytoceratinae
Genus:	†Lobolytoceras Buckman, 1923