According to the taxonomy of the Gastropoda by Bouchet & Rocroi the family Obtortionidae has been recognized as a synonym of family Scaliolidae within clade Caenogastropoda/clade Sorbeoconcha/Superfamily Cerithioidea. Finellidae has been also a synonym of Scaliolidae.
2006 taxonomy
Bandel have classified Obtortionidae in superfamily Cerithioidea within clade Cerithimorpha in the order Palaeo-Caenogastropoda Bandel, 1993 within subclass Caenogastropoda.