1889  Popanoceras walcotti White: 117, pl.1 fig.9-11.
     1891  Popanoceras walcotti.-White: 21, pl.1 fig.9-11.
     1902  Popanoceras Walcotti.-Frech: 472 textfig.2.
     1903  Popanoceras walcotti.-Smith: 134, pl.22 fig.9-11.
     1937  Popanoceras walcotti.-Plummer & Scott: 166, pl.40
           fig.1-3.
     1988  Popanoceras walcotti.-Glenister & Furnish: 56,
           text-fig.3, tab.2, pl.1 fig.1.

Fig. TAX3867 C (suture).