1848  Goniatites sulcatus.- Richter, p.32.
     1913  Postprolobites Frechi Wedekind, p.88, pl.8 fig.7-9, text-fig.5d.
     1913  Postprolobites Frechi.-Frech, p.33.
     1918  Postprolobites Frechi.-Wedekind, p.157, p.19 fig.12,13, textfig.50f.
     1923  Postprolobites Frechi.-Schindewolf, p.407, pl.16 fig.5.
     1929  Prionoceras frechi.-Lange, p.59.
     1950  Postprolobites frechi.-Termier & Termier, p.60, pl.146 fig.29-31, pl.53 fig.50-52.
     1956  Prionoceras frechi.-Müller, p.66, pl.2 fig.18.
     1958a Postprolobites frechi.-Chang: 85.
     1958b Postprolobites frechi.-Chang: 321.
     1959  Prionoceras frechi.-Petter, p.243, pl.18 fig.1-3,17, 18, textfig.56A.
cf. 1960  Prionoceras (Prionoceras) cf. frechi.-Kullmann, p.526,  pl.7 fig.2. [= Prionoceras sp., see TAX1344].
     1962  Prionoceras frechi.-Bogoslovskiy, pl.14 fig.7.
     1971  Prionoceras frechi.-Bogoslovskiy, p.184, pl.16 fig.1-3.    
     1992  Prionoceras frechi.-Korn: 31, pl.1.
     1994  Prionoceras frechi.-Korn, p.12, textfig.4F,G; 6D; 7C;  29A; 30D.
cf. 1997  Prionoceras cf. frechi.-Becker: 32.
     1999  Prionoceras frechi.-Korn: 166, pl.2 fig.7.
     2002  Prionoceras frechi.-Korn & Klug: 193, Fig.170 B, H, M, Fig.171 B.

Fig. TAX865 A (suture).