freshwater limpet การใช้

• The families in this clade are basically air-breathing freshwater snails including freshwater limpets.
• This genus was previously placed instead in a larger family of freshwater limpets, the Ancylidae.
• In these small freshwater limpets, that " lung " underwent secondary adaptation to allow the absorption of dissolved oxygen from water.
• Many of the very small freshwater limpets which live in cold water have lost the ability to breathe air, and instead flood their mantle cavity with water.
• ""'Ancylastrum " "'is a genus of air-breathing freshwater limpets, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies.
• ""'Ferrissia " "'is a genus of small, air-breathing freshwater limpets, aquatic gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies.
• Most marine limpets have gills, whereas all freshwater limpets and a few marine limpets have a mantle cavity adapted to breathe air and function as a lung ( and in some cases again adapted to absorb oxygen from water ).
• Some saltwater limpets such as Trimusculidae breathe air, and some freshwater limpets are descendants of air-breathing land snails ( e . g . the genus " Ancylus " ) whose ancestors had a pallial cavity serving as a lung.