Slender Saint Helena Snail (Helenoconcha leptalea)
The Slender Saint Helena Snail was described in 1892, apparently on the basis of subfossil shells that were recovered from the so-called Sugarloaf Quarry on the island of Saint Helena.
The shells of this species are much smaller than those of the closely related Many-toothed Saint Helena Snail (Helenoconcha polyodon (Sowerby)); they were flatter, much more finely striated and differed furthermore by their oral armature. [1]
*********************
References:
[1] Edgar A. Smith: On the land-shells of St. Helena. Proceedings of the Zoological Society of London. 1892: 258-270
*********************
(public domain)
*********************
edited: 29.05.2021