Leptachatina obsoleta (Pfeiffer)

Obsolete Leptachatina Snail (Leptachatina obsoeta)

The Obsolete Leptachatina Snail was described in 1856; it is known to have inhabited the crater of the Haleakalā volcano on the island of Maui, Hawaiian Islands, where it was found at an elevation of nearly 2440 m “rather abundant under stones near “Crystal Cave” on the almost barren floor of the crater.” [1]

Only seventeen adult specimens were gathered, three of which have a remarkable development. Near the base of the columella is a low blunt spiral callus on the perietal wall and extending into the aperture. This may be a senile character, though two of the specimens do not show any signs of senility. This thickening has not been observed in any other species.” [1]

The shells reach a height of about 0.8 cm; they are thin, very faintly striated, glossy pale corneous, the outer lip and the columella are edged with dark brown.

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Depiction from: ‘George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911’   

(public domain)

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References:   

[1] George W. Tryon; Henry A. Pilsbry; a.o.: Manual of Conchology. Second series: Pulmonata. Vol 21: Achatinellidae (Amastrinae). 1911

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edited: 15.01.2024