1935  Propinacoceras ajense Maksimova: 274, fig.1-5.
     1956  Propinacoceras ajense.-Ruzhentsev: 99.
     1949  Propinacoceras ajense.-Tumanskaya: 80, textfig.37.
     1962  Propinacoceras ajense.-Bogoslovskaya: 43, pl.1 fig.9,
           text-fig.11-12.
     1963  Propinacoceras ajense.-Tumanskaya: 90, pl.19 fig.1-6.
     1989  Propinacoceras ajense.-Leonova in Leonova & Dimitriev:
           fig.12,13.

Fig. TAX3808 A-F (sutural development).