Wollaston’s Saint Helena Discus Snail (Helenodiscus vernoni)
Wollaston’s Saint Helena Discus Snail was described in the year 1892 on the basis of subfossil shells, which were found at the so called Side Path, a steep mountain pass, that connects the two villages of Briars Village and Jamestown in the north east part of the island of Saint Helena.
The shells of this species reached an average size of about 1,2 cm.
The species died out sometimes after the beginning of the permanent European settlement of the island in the 16.th century.
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(public domain)
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edited: 21.03.2018
