1900  Pericyclidae Hyatt: 551 ( in Zittel-Eastmann ).
     1957  Pericyclinae.- Miller & Furnish: L58.
     1960  Pericyclidae.- Ruzhentsev: 201.
     1962  Pericyclidae.- Osnovy: 366.
     1980  Pericyclidae.- Kuzina: 62.
     1996  Pericyclidae.- Riley: 69.
     2000  Pericyclidae.- Work, Nassichuk & Richards: 34.

Superfamily Pericyclaceae:

Conch form variable. Shell surface smooth or with faint or prominent transverse sculpture; constrictions may be present.
Ventral lobe commonly narrow or moderately wide, median saddle relatively low. Adventitious lobe on ventrolateral
portion of flanks; lateral lobe usually smaller than other lobes. Sutural formula:
[Germ.] (E1EmE1)AL:UI, [RUSS.] (V1V1)LU:ID.

Family Pericyclidae:
Conch form variable. With prominent transverse sculpture; some species with spiral ornamentation. Ventral lobe with
parallel or orad diverging sides. First lateral saddle rounded or subacute, rarely acute; adventitious lobe acute.
[Phylogenetic relationship uncertain; may be artificial grouping].

Subfamily Ammonellipsitinae Riley,1996:
Ventral lobe with orad diverging sides; first lateral saddle acute to subacute.

Subfamily Pericyclinae Hyatt,1900:
Ventral lobe with parallel or subparallel sides; first lateral saddle well rounded.