Patera is a genus of land snails in the family Polygyridae. The name is from the Latin patera ("a saucer"), and refers to the highly depressed, saucer-like shape of the shells of these snails. In addition to flattened shells, members of the group have an imperforate umbilicus and a single tooth on the parietal wall of the aperture. These snails are known only from the eastern United States. Species Species include: Patera appressa – flat bladetooth Patera binneyana – half-lidded oval Patera clarki – dwarf proud globe Patera clarki clarki Patera clarki nantahala – noonday globe Patera clenchi – Calico Rock oval, Clench's middle-toothed land snail Patera indianorum – lidded oval Patera kiowaensis – drywoods oval Patera laevior – smooth bladetooth Patera leatherwoodi – Pedernales oval Patera panselenus – Virginia bladetooth Patera pennsylvanica – proud globelet Patera perigrapta – engraved bladetooth Patera roemeri – Texas oval Patera sargentiana – grand bladetooth References Polygyridae Fauna of the Eastern United States