Athearnia crassa, the boulder snail, was a species of freshwater snail in the family Pleuroceridae. It was[when?] native to the United States, where it was known from Alabama, Georgia, Tennessee, and Virginia. It is now extinct.[1]

References

  1. ^ a b Mollusc Specialist Group (1996). "Athearnia crassa". IUCN Red List of Threatened Species. 1996: e.T11768A3304335. doi:10.2305/IUCN.UK.1996.RLTS.T11768A3304335.en. Retrieved 15 November 2021.


Allikas: http://en.wikipedia.org/wiki/Athearnia_crassa
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