pt. 1939  Gonioloboceras.-Miller & Owen: 156.
     1975  Gonioloboceratoides Nassichuk: 74.

Type species: Gonioloboceratoides curvatus Nassichuk, 1975, p.75 [OD].

A:   Conch form discoidal and highly involute; umbilicus narrow. Umbilical shoulder narrowly rounded, umbilical walls flat.
G:   Venter rounded, at maturity slightly flattened. Fine growth striae with ventral and laterals sinus. Prongs of ventral lobe
broad and rounded during ontogeny, bluntly pointed at maturity. First lateral saddle asymmetric, rounded and twice as broad as adventitious lobe.

[Nassichuk, 1975, p.74: The conch of Gonioloboceratoides is discoidal and highly involute;
the umbilicus approximately 10 per cent of the conch diameter. The umbilical shoulder is
narrowly rounded and the walls are flat. The venter is generally evenly rounded throughout
ontogeny but may be slightly flattened at full maturity. Shell ornament consists of fine
growth lamellae that form ventral lateral sinuses.

Prongs of the ventral lobe are broad and rounded during early ontogeny but bluntly pointed at
maturity. The first lateral saddle is markedly asymmetric, rounded and is nearly twice as
broad as the asymmetric, V-shaped first lateral lobe].