1914  Adelphoceratidae Wedekind: 10 [nomen oblitum].
     1918  Girtyoceratinae Wedekind: 139 [nom. subst. pro
           Adelphoceratidae Wedekind, 1914, p.10 (nom. oblitum).
     1937  Adelphoceratidae.- Plummer & Scott.
  ?  1946  Girtyoceratinae.- Moore: 391. (nov. nom.).
     1957  Girtyoceratidae.- Ruzhentsev: 57. [nom. transl.].
     1960  Girtyoceratidae.- Ruzhentsev: 204.
     1962  Girtyoceratidae.- Osnovy: 368.
     1964  Girtyoceratidae.- McCaleb, Quinn & Furnish: 11.
     1971  Girtyoceratidae.- Ruzhentsev & Bogoslovskaia: 168.
     1996  Girtyoceratidae.- Riley: 25. [included in Superfam.
           Girtyocerataceae Riley,1996, p.25].
     1999  Girtyoceratidae.- Korn, Klug & Mapes: 353.

A:   Conch form subdiscoidal to subglobular, moderately to
completely involute, with moderately wide to small umbilicus.
B:   Sculpture variable within wide range: transverse striae
prominent or weak, usually biconvex, with ventro-lateral salient
and ventral sinus.
D:   Constrictions common.
E-F: Longitudinal lirae and / or ventro-lateral grooves may be
present.
G:   Ventral lobe moderately wide to wide, with diverging sides;
first lateral saddle usually well rounded, rarely pointed.
Adventitious lobe V-shaped, frequently with sinuous sides.
Sutural formula:
     [Germ.] (E1EmE1)AL:UI, [Russ.] (V1V1)LU:ID.