1996  Parahammatocyclus Riley: 78.

Type species: Parahammatocyclus chaigleyensis Riley, 1996, p.78 [OD].

A:   Conch small, pachycone, on early growth stages widely umbilicate.
B:   Simple, coarse growth lines, radial, with weak ventral sinus.
C:   On middle growth stage with umbilical tubercles which disappear on later growth stages.
G:   Ventral lobe wide, with slightly divergent sides and low median saddle. First lateral saddle broadly rounded;
adventitious lobe deep and broad, with flexed sides and an acute mammilate termination.