Obtortionidae is a family of sea snails, marine gastropod molluscs in the superfamily Cerithioidea, that is within the clade Cerithimorpha[1] or in clade Sorbeoconcha.
[1] According to the taxonomy of the Gastropoda by Bouchet & Rocroi (2005) the family Obtortionidae has been recognized as a synonym of family Scaliolidae within clade Caenogastropoda/clade Sorbeoconcha/Superfamily Cerithioidea.
[2] Finellidae has been also a synonym of Scaliolidae.
[2] Bandel (2006)[1] have classified Obtortionidae in superfamily Cerithioidea within clade Cerithimorpha in the order Palaeo-Caenogastropoda Bandel, 1993 within subclass Caenogastropoda.
[1] Genera within the family Obtortionidae include: