Wikipedia
Biomphalaria
Biomphalaria is a genus of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks in the family Planorbidae, the ram's horn snails and their allies.
Biomphalaria is the type genus of the tribe Biomphalariini.
Taphius is a synonym for Biomphalaria.
The shell of this species, like all planorbids is sinistral in coiling, but is carried upside down and thus appears to be dextral.