1987  Aulatornoceras (Truyolsoceras) Montesinos: 121.
     1993  Truyolsoceras.-Becker: 217.
     2002  Truyolsoceras.-Korn & Klug: 161.

Type species: Goniatites retrorsus var. undulatus G. & F. Sandberger, 1850/51, non  Brown,1841, = Tornoceras sandbergeri
Foord & Crick,1897, p.122.

A:   Conch lenticular, with moderately high aperture, involute, with narrow umbilicus.
B:   Growth lines ventrally and laterally riblet-like, with distinct ventro-lateral furrows.
G:   Adventitious lobe rounded. Sutural formula: [Germ.] EALI.