1884  Prionoceras Hyatt: 328.
     1897  Brancoceras.- Foord & Crick: 131.
     1900  Haugiceras.- Cossmann.
     1913  Postprolobites.- Wedekind: 87.
     1918  Postprolobites.- Wedekind: 157.
     1920  Prionoceras.- Buckman.
     1923  Postprolobites.- Schindewolf: 402.
     1924  Aganides.- Schmidt: 116, 148.
     1928  Prionoceras.- Schindewolf: 313.
     1929  Prionoceras.- Lange: 58.
     1931  Prionoceras.- Matern: 51.
     1941  Imitoceras.- Librovitch: 137.
     1947  Prionoceras.- Nalivkina: 172.
non1947  Imitoceras.- Nalivkina: 173 [= Dimeroceras].
     1952  Prionoceras.- Schindewolf: 289.
     1956  Prionoceras.- Müller: 64.
     1957  Prionoceras.- Treatise: L49.
     1959  Prionoceras.- Petter: 241.
     1960  Prionoceras.- Kullmann: 68.
     1960  Prionoceras.- Vöhringer: 113. 175.
     1960  Imitoceras.- Vöhringer: 113.
     1960  Prionoceras.- Ruzhentsev: 172.
     1961  Prionoceras.- Kullmann: 246.
     1962  Prionoceras.- Kullmann: 72.
     1962  Prionoceras.- Osnovy: 362.
     1963  Prionoceras.- Kullmann: 306.
     1971  Prionoceras.- Bogoslovskii: 181.
     1994  Prionoceras.- Korn: 11.
     2002  Prionoceras.-Korn: 569.
     2002  Prionoceras.-Korn & Klug: 190.
     2009  Prionoceras.-Kullmann in Furnish et all: 2.

Type species: Goniaites divisus Münster, 1832, p. 24 [OD], [non BUCKMAN, 1920, p.155]. [Haugiceras COSSMANN, 1900, p.43, nom. subst. (obj.); = Postprolobites WEDEKIND, 1913, p.87 (type P. yakowlewi WEDEKIND, 1913, p.87, SD WEDEKIND, 1918, p.157, = Goniatites divisus Münster 1832 (subj.), for discussion see SCHINDEWOLF, 1923, p.402)].

A:   Conch form subdiscoidal to subglobular, involute, with punctiforme umbilicus.
B:   Growth lines fine and linear, with hyponomic sinus.
D:   Adult whorls with 3 - 4 weak constrictions, beginning at umbilicus, rather deep on flanks, usually not crossing the venter.
G:   Ventral lobe with diverging or parallel sides.