Pupilla obliquicosta   (Smith)


 
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Saint Helena Pupa Snail
(Pupilla obliquicosta)

 
syn. Pupa obliquicostulata (Smith)

 
distribution:

British overseas territory of Saint Helena, Ascension and Tristan da Cunha: Saint Helena

 
local name: -

 
size: ca. 0,2 cm (shell)

extinction date: (?)

 
This tiny snail was already extinct for a long time, when it was described in the year 1892 on the basis of empty shells.

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Another species from the Whorl Snail family (Vertigidae), also coming from the island of Saint Helena, Turton's Pupa Snail (Nesopupa turtoni (Smith)), was described at the same time and also only on the basis of empty shells (as Pupa turtoni (Smith)). It was considered extinct from the outset too, but was rediscovered alive in the year 2003.

 
left:

Saint Helena Pupa Snail (Pupilla obliquicosta)


Depiction from 'Edgar A. Smith: On the Land-Shells of St. Helena. Proceedings of the Zoological Society of London 1892, 258-270'

http://www.biodiversitylibrary.org

 
References:

- Edgar A. Smith: On the Land-Shells of St. Helena. Proceedings of the Zoological Society of London 1892, 258-270