La Gomera Land Snail (Hemicycla gomerensis)
This species was described in 1864, it is or was endemic the the island of La Gomera, Canary Islands.
The shell reaches a size of about 2,1 cm in diameter.
“In proportion to its size the shell is extremely thin and fragile, being more than usually sub-diaphanous when held up to the light; and its colour is a deep castaneous-brwon, but rather paler (or more olivaceous) beneath, with extremely indistinct indications of three obsolete darker bands, – one of which is just below the dorsal line, another immediately above it, and the third a little behind the suture (the space between this last one and the suture being sometimes, apparently, though not in the specimens now before me, of a more lively ochreous yellow).” [1]
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The La Gomera Snail is listed in the Red List of the IUCN as ‘data deficient’, but may be already extinct.
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References:
[1] T. Vernon Wollaston: Testacea Atlantica: or the Land and Freshwater Shells of the Azores, Madeiras, Salvages, Canaries, Cape Verdes, and Saint Helena. London: L. Reeve & Co. 1878
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(public domain)
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edited: 05.12.2018