Bythinella microcochlia Letourneux & Bourguignat

Dwarf Spring Snail (Bythinella microcochlia)  

This species was found only once at the end of the 19th century near the town of Oudref in the Gabès Governorate in Tunisia.  

Searches in the 70s of the 20th century failed to find any specimens, and the species is considered extinct since then.  

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edited: 04.11.2017