Helenodiscus vernoni was a species of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Charopidae.

This species was endemic to Saint Helena. It is now extinct.

References

  1. ^ Mollusc Specialist Group (1996). "Helenodiscus vernoni". IUCN Red List of Threatened Species. 1996: e.T9771A13014985. doi:10.2305/IUCN.UK.1996.RLTS.T9771A13014985.en. Retrieved 17 November 2021.


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