title: Helicotomidae
text: # Helicotomidae
  
  Helicotomidae is an extinct family of Paleozoic molluscs (gastropods?) with anisostrophically coiled shells of uncertain position (Gastropoda?) (according to the taxonomy of the Gastropoda by Bouchet & Rocroi, 2005).
  
  ## Taxonomy
  
  The taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 categorizes Helicotomidae in the superfamilia Euomphaloidea within the Paleozoic molluscs with anisostrophically coiled shells of uncertain position (Gastropoda?). This family has no subfamilies.
  
  ## Genera
  
  Genera in the family Helicotomidae include:
  
  * Amphelissa
  * Boucotspira
  * Boucotspira
  * Burdikinia - synonym: Polyamma.
  * Colpomphalus
  * Helicotoma Satler, 1859 - type genus of the family Helicotomidae
  * Lophonema - synonym: Polhemia.
  * Ophiletina
  * Palaeomphalus
  * Paraviviana
  * Walcottoma
  * Yochelsoniella
  