Major Groups | Gastropoda (snails) | Hygrophila (snails) Note: Key from Smith 1996, Ponder 2013 |
|
Scroll to end of page to see all examples | |
Click on image to enlarge | |
Hold mouse over image for identification |
1. Shell helicoid, sinistral OR dextral, with spire (S), OR planispiral
|
|
|||||||||||||||||
-Shell patelliform (freshwater limpet group)
|
|
||||||||||