1937  Gastrioceras prone Miller & Owen: 415, pl.52 fig.1-3.
     1950  Pronoceras prone.-Plummer: pl.19.
     1962  Gastrioceras prone.-Unklesbay: 75, pl.10 fig.1,2.
     1994  Trochilioceras prone.-Boardman,Work,Mapes & Barrick:
           67, pl.5 fig.18,19.