1948  Trapezopericyclus Turner: 51.
     1951  Ammonellipsites ? (Trapezopericyclus).-Schindewolf:
           306, 309.
     1957  Pericyclus (Trapezocyclus).-Treatise: L59 [sic !].
     1960  Pericyclus.-Ruzhentsev: 201.
     1962  Pericyclus.-Osnovy: 366.

Type species: Pericyclus trapezoidalis Crick,1899, p.432 [OD].

Pericyclids with longitudinal (spiral) ornamentation.