Peripetoceras

Peripetoceras is a genus in the Clydonautilacean family, Liroceratidae. It can be recognized by its smooth, involute shell with a deep small umbilicus with rounded shoulders and steep convex wall; whorl section with flattened venter, rounded ventral shoulders and convergent slightly convex flanks; suture with slight ventral and lateral lobes; and small siphuncle located dorsally of the center.

Peripetoceras Temporal range: L Carboniferous (Miss) - Permian
Scientific classification
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	Nautiloidea
Order:	Nautilida
Family:	†Liroceratidae
Genus:	†Peripetoceras Hyatt, 1894

Peripetoceras ranges from the Lower Carboniferous (Upper Mississippian) to the Permian and has been found in Europe (England and Germany), Russia and China.