Arrow-shaped Tree-Snail (Partula sagitta)  

This species was described in 1953.  

The Arrow-shaped Tree-Snail was apparently restricted to a single locality at about 230 m in the Hamene valley at the slopes of Mt. Purauti in the center of Taha’a, Society Islands, where it was only ever found by the “Mangareva Expedition” in 1934.  

The species is now clearly extinct.  

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References:  

[1] Justin Gerlach: Icons of Evolution: Pacific Island Tree-Snails of the Family Partulidae. Phelsuma Press 2016  

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edited: 18.10.2017