Sinployea youngi was a species of small air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Charopidae. This species was endemic to the Cook Islands; it is now extinct.
References
- ^ Seddon, M.B.; Solem, A. (1996). "Sinployea youngi". IUCN Red List of Threatened Species. 1996: e.T20265A9182227. doi:10.2305/IUCN.UK.1996.RLTS.T20265A9182227.en. Retrieved 15 November 2021.