Neoplanorbis smithi
Encyclopedia
Neoplanorbis smithi was a species of freshwater snail
Freshwater snail
A freshwater snail is one kind of freshwater mollusc, the other kind being freshwater clams and mussels, i.e. freshwater bivalves. Specifically a freshwater snail is a gastropod that lives in a watery non-marine habitat. The majority of freshwater gastropods have a shell, with very few exceptions....

, a gastropod in the Planorbidae
Planorbidae
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks....

 family. It was endemic to the United States
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

. It is now extinct.
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