2007  Nigrocyclus Korn & Feist: 112.

Type species: Pericyclus niger Delepine, 1935, p.    [OD].

Korn & Feist, p.112: Pericyclidae with lenticular conch and narrow umbilicus. Sharp ribs with convex course in juveniles and biconvex course in adults; ventral sinus chevron-shaped. Suture line with V-shaped, narrow external lobe.

Genus uncertain, type species (the only specimen known) very small and poorly preserved.