1955  Waagenoceras umbilicatum Chao: 139, 150, text-fig.2-1,
           pl.1 fig.12-13.
     2000  Shengoceras umbilicatum.-Zhou, Glenister & Furnish:
           78, text-fig.2a,b, pl.1 figs. 1-4.

[Species based originally on holotype NIGP 7464, a fragmentary
and immature specimen, entirely septate.]

Fig. TAX6352 (suture).