1914  Gomi-re-monomeroceras (Tornoceras) simplificatum Sobolev: 64, pl.9 fig.27-28, text-fig.116.
     1970  Protornoceras simplificatum.-House, pl.125 fig.9-19.
     2002  Protornoceras simplificatum.-Korn & Klug: 165, Fig.150 C.