1986  Pericyclus (Goniocyclus) Gordon: 21.
     2002  Goniocyclus.-Work: 187.

Type species: Goniatites blairi Miller & Gurley, 1896, p.35 [OD].

[= Nematocyclus GORDON, 1986, p.28, type Pericyclus (Goniocyclus) filaris GORDON, 1986, p.26, M (nom. nud.)].

A:   Conch form discoidal, ventral side broadly or narrowly rounded, umbilicus usually wide.
C:   Ribs rursiradiate, bending backward on outer flanks and meeting in an acute or slightly obtuse angle.
F:   Spiral ornamentation in some species; no constrictions.
G:   Suture as in Pericyclus, but sides of ventral lobe concave outward.