1951  Pericyclus (Helicocyclus) Schindewolf, p.76, 79.
     1951  Ammonellipsites (Helicocyclus).-Schindewolf: 309.
     1957  Helicocyclus.- Treatise, p.L59.
     1960  Helicocyclus.- Ruzhentsev, p.201.
     1962  Helicocyclus.- Osnovy, p.366.
     1980  Helicocyclus.- Kuzina: 65.
     1996  Helicocyclus.- Riley: 73.

Type species: Pericyclus (Helicocyclus) gracillimus Schindewolf, 1951, p.79 [OD].

A:   Conch form discoidal, mostly with wide umbilicus.
C:   Sculpture consisting of faint, densely spaced, usually unsplit ribs, crossing radially flanks and venter; no umbilical
nodes.
B:   Growth lines linear, with weak ventral salient.
G:   Ventral lobe with subparallel and slightly sinuous, in some species somewhat divergent sides. Adventitious lobe
acute, with flexed sides.