Planitrochidae
Introduction '''Planitrochidae''' is an extinct family of fossil sea snails, Paleozoic gastropod mollusks.This family has no subfamilies.
Genera Genera within the family Planotrochidae include:* ''Horologium''* ''Nematrochus''* ''Perneritrochus''* ''Planotrochus, the type genus* ''Trochomphalus''
References *  Paleobiology database info