Helicotomidae
Introduction '''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''
References