1998 Yongpingoceras yanshanense Ma & Li: 86, text-fig.1 D a, pl.2 fig.11-18.
      -----  Nodogastrioceras discum Ma & Li: 83, textfig.1 A, pl.1 fig.1-14.

C:   Sculptured.
G:   Lanceolate prongs of V-shaped ventral lobe.