• Source: Neoplanorbis smithi

†Neoplanorbis smithi was a species of small freshwater snail, an aquatic gastropod mollusk in the family Planorbidae, the ramshorn snails. This species was endemic to the United States; it is now extinct.
The shells of this species appear to be dextral in coiling, but as is the case in all planorbids, the shell is actually sinistral. In life the shell was carried upside down with the aperture on the right, and this makes it appear to be dextral.




References

Kata Kunci Pencarian:

• Neoplanorbis smithi
• Neoplanorbis
• List of North American animals extinct in the Holocene
• List of recently extinct molluscs
• List of recently extinct invertebrates
• IUCN Red List of extinct species
• Bryant Walker
• List of non-marine molluscs of the United States