Auriculella diaphana is a species of air-breathing tropical land snails, terrestrial pulmonate gastropod mollusks in the family Achatinellidae.
Subspecies Auriculella diaphana cacuminis Pilsbry & C. M. Cooke, 1915 Auriculella diaphana diaphana E. A. Smith, 1873
Description The length of the shell attains 7 mm, its diameter 4 mm
(Original description in Latin) The shell is sinistral (left-handed) and possesses an ovate-conic shape. It is characterized by being extremely thin and having a horn-like (corneous) texture. The surface is marked by brown streaks and is obscurely encircled around the middle of the body whorl by a dark brown zone.
There are five and a half whorls, which are slightly convex, and the suture is simple in form. The peristome is thin and only slightly dilated. The columella is scarcely folded and somewhat reflected, a configuration that forms a small umbilical fissure. It is joined to the lip by an extremely thin callous deposit. Finally, the parietal lamina is thin.
Distribution This species is endemic to Hawaii.
References
Cowie, R. H., Evenhuis, N. L. & Christensen, C. C. (1995). Catalog of the native land and freshwater molluscs of the Hawaiian Islands. vi + 248 pp. Leiden: Backhuys Publishers.