Small Rurutu Austral Snail (Australdonta collicella)  

The species was described in 2009.  

The shell reached a size of about 0,58 cm in diameter. [1]  

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The island of Rurutu is now known to have once harbored 11 species of this genus, all of them are now extinct. [1]  

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References:  

[1] Gabrielle Zimmermann; Olivier Gargominy; Benoît Fontaine: Quatre espèces nouvelles d’Endodontidae (Mollusca, Pulmonata) éteints de Rurutu (Îles Australes, Polynésie française). Zoosystema 31(4): 791-805. 2009 
[2] Olivier Gargominy; Benoît Fontaine: A Global Overview of the Terrestrial and Freshwater Molluscs. In: Jean-Yves Meyer; Elin. M. Claridge: Biodiversity of the Austral Islands, French Polynesia. Muséum national d´Histoire naturelle, Paris. 55-91. 2014  

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edited: 21.03.2018