1985  Anuitidae Andrianov: 154.

[Andrianov 1985, p. 154: Conch varies little:  Subcadicone to cadicone.  
Whorls moderately evolute.  Umbilicus quite wide, stairstep-like.  
Sculpture reticulate.  Folds or nodes present in pre-umbilical area.  
Constrictions with ventral sinus.  Ventral lobe widens during phylogeny.  
Lateral lobe very wide.  Umbilical lobe shows threefold division: from weakly
developed to distinct.]

Anuitidae are regarded herein as belonging to Fam. Metalegoceratidae (Spirolegoceratinae).