Miocene gastropods

Planorbis is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod molluscs in the family Planorbidae, the ram's horn snails, or planorbids. All species in this genus have sinistral or left-coiling shells.

thumb|220px|Fossil Euthria from the Pliocene of [[Cyprus.]] thumb|Middle Miocene Euthria species from the [[Pannonian Basin (Central Paratethys)]] thumb|Euthria calypso thumb|Fossil shell of Euthria cornea from the [[Pliocene epoch of Italy]]

Clavilithes is an extinct genus of fossil sea snails, marine gastropod mollusks in the family Fasciolariidae, the tulip snails and spindle snails.