1978 Periptychoceras Zhao, Liang & Zheng: 97, 178.

Type species: Periptychoceras compressum Zhao, Liang & Zheng, 1978, p.97; OD.

[Zhao et al., 1978]: Shell rather large, evolute, thinly discoidal and elliptical in coiling. Whorl section high
helmet-shaped. Venter narrow and carinate. Sides flattened or slightly convex.Umbilicus wide and shallow bordered by
steeply inclined walls and flared shoulders, which are marked by short folds or wrinkles. Suture line ceratitic, with rather
wide ventral lobe and slender laterals.