| Amastra aemulator | |
|---|---|
 | |
| Shell of Amastra aemulator (holotype) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. aemulator |
| Binomial name | |
| Amastra aemulator Hyatt & Pilsbry, 1911 | |
| Synonyms | |
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Amastra (Metamastra) aemulator Hyatt & Pilsbry, 1911 alternative representation | |
Amastra aemulator is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
The length of the shell attains 15.5 mm, its diameter 8.6 mm.
(Original description) The shell contains seven whorls. The shell is narrowly perforate, ovate-pyramidal, and moderately solid. The spire's outlines are nearly straight at the base, becoming slightly concave near the apex. The whorls are slightly convex and relatively short. The 2½ whorls of the protoconch are a dull purplish color and very finely and regularly striate when unworn. The subsequent whorls are irregularly wrinkle-striate, with the cuticle initially light olive, transitioning to olive-brown on the last two whorls. The surface is somewhat glossy, but where the cuticle is worn away, it reveals a dull gray and purplish-brown calcareous layer beneath.
The aperture is small, slightly oblique, and dull purplish-gray inside, becoming paler with a barely perceptible thickening near the lip. The columella is short, thick, and whitish, featuring a subhorizontal lamella. The parietal callus is very thick, its edge forming a ledge that seamlessly connects the ends of the lip.
This species is endemic to Hawaii and occurs on Oahu Island.
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This article incorporates text from this source, which is in the public domain.