1965  Syrdenites Nassichuk, Furnish & Glenister: 46.
     2002  Syrdenites.-Leonova: S.22.

Type species: Syrdenites stoyanowi Nassichuk, Furnish & Glenister, 1965, p.46 [OD].

Diagnosis Nassichuk et al., p.46:  Advanced medlicottiins lacking prominent shell sculpture and with whorls similar to Medlicottla.  Lateral saddles of suture possess prominently trifid pattern that extends into secondary elements of the high adventitious first lateral saddle in the ventrolateral area (Text-figure 15B).  A most distinctive feature is the ventral sigmoid continuity of the over-all sutural trace.