2000  Goniocycloides Work & Nassichuk in Work, Nassichuk & Richards: 35.

Type species: Goniocycloides ochakensis Work & Nassichuk, 2000, p.35 [OD].

A:   Subdiscoidal with moderately large umbilicus and broadly arched venter.
C:   Persistant umbilical nodes give rise to strong transverse ribs that increase by bifurcation and intercalation and trace a deep angular hyponomic sinus.
G:   Ventral lobe chaaterized by divergent flanks and high attenuated median saddle, about a third in height of entire lobe. First lateral saddle wide and narrowly rounded.