1874  Goniatites postcarbonarius Karpinskiy: 291, pl.12
           fig.6-8.
     1889  Pronorites postcarbonarius var. tetragonus Karpinskiy:
           14.
     1890  Pronorites postcarbonarius var. tetragonus.-
           Karpinskiy: 23.
     1938  Sakmarites postcarbonarius.-Ruzhentsev: 239, pl.1 fig.
           14,15, textfig.4.
     1939  Pronorites postcarbonarius var. tetragonus.-  
           Chernov, 162, pl.41 fig.2.
     1945  Pronorites postcarbonarius var. tetragonus.-
           Karpinskiy: 46.
     1945  Goniatites postcarbonarius.-Karpinskiy: 18, pl.1 fig.
           6-8.
     1949  Sakmarites postcarbonarius.-Ruzhentsev: fig.41a,42.
     1951  Sakmarites postcarbonarius.-Ruzhentsev: 80.

Fig. TAX3167 A (cross-section).