Crops > Grains > Rice > Snail, Nghe An (central), Vietnam

February 2012. A snail in rice from Nghe An (central), Vietnam, sent from the Plant Quarantine Diagnostic Centre. What is it?

There was no response from members.

Later, a member wrote that is probably a species of Ampullariidae or Viviparidae, but from teh images it is not possible to say which.