Image of: Gyraulus
Image of: Gyraulus
ADW: 062.rjb1.jpg
Caption
Gyraulus
.The
Planorbidae
is a freshwater snail family of the subclass
Pulmonata
. These snails, although aquatic, are lung breathers. Gills are lacking; instead there is a large pulmonary sac for gaseous exchange. In the snail shown here, nearly half of the last whorl is occupied by the lung, clearly visible as an air-filled space. The
Planorbidae
|
