OmphalotrochidaeOmphalotrochidae is an extinct taxonomic family of Paleozoic molluscs with anisostrophically coiled shells of uncertain position (Gastropoda?).TaxonomyThe taxonomy of the Gastropoda by Bouchet & Rocroi, 2005 places Omphalotrochidae in the superfamilia Euomphaloidea within the Paleozoic molluscs with anisostrophically coiled shells of uncertain position (Gastropoda?). This family has no subfamilies.GeneraGenera in the family Omphalotrochidae include:Coronopsis Waterhouse, 1963Omphalotrochus Meek, 1864 - type genus of the family Omphalotrochidae