title: Acrotretoidea
text: # Acrotretoidea
  
  Acrotretoidea is a superfamily of brachiopods containing the following families:
  
  | Family | Number of genera | Fossil range |
  | - | - | - |
  | Acrotretidae | 55 | Lower Cambrian – Silurian |
  | Curticiidae | 1 | Middle – Upper Cambrian |
  | Torynelasmatidae | 9 | Ordovician (Arenig) – Silurian |
  | Eoconulidae | 3 | Ordovician (Arenig – Ashgill) |
  | Ceratretidae | 8 | Lower – Upper Cambrian |
  | Ephippelasmatidae | 12 | Upper Cambrian – Ordovician |
  | Scaphelasmatidae | 6 | Middle Cambrian - Upper Silurian |
  | Biernatidae | 5 | Lower Ordovician – Middle Devonian |
  