Arnaldo’s Naesiotus Snail (Naesiotus arnaldoi)
This species was described in 1971; it was endemic to the Ilha da Trindade offshore Brazil; it is apparently known from over 300 specimens.
The shells reach heights of about 0,95 cm.
The species disappeared sometimes during the 1970s due to the destruction of most of the native vegetation by introduced goats. [1]
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References:
[1] Rodrigo B. Salvador; Carlo M. Cunha; Luiz Ricardo L. Simone: Taxonomic revision of the orthalicid land snails (Pulmonata: Stylommatophora) from Trindade Island, Brazil. Journal of Natural History 47(13-14): 949-961. 2013
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edited: 02.05.2022