Alcadia rotunda
Species of gastropod
From Wikipedia, the free encyclopedia
Alcadia rotunda is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae.[1]
| Alcadia rotunda | |
|---|---|
| |
| Shell of Alcadia rotunda (specimen at the Natural History Museum, London) | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Cycloneritida |
| Family: | Helicinidae |
| Genus: | Alcadia |
| Species: | A. rotunda |
| Binomial name | |
| Alcadia rotunda (A. d'Orbigny, 1842) | |
| Synonyms[1] | |
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Description
The height of the shell attains 7 mm (0.28 in), its greatest diameter 8 mm (0.31 in).[citation needed]
(Original description in Latin) The thick, smooth shell is globular-round and pink. The spire is inflated with a pointed apex. The shell contains six slightly convex whorls. It has a narrow, semi-lunar aperture with a thin, slightly reflexed outer lip. The columella is thickened and has some impressions. The columellar angle of the aperture is notched and sinuous.[citation needed]
(Original description in French also by A. d'Orbigny) A globular, slightly elevated shell that is thick and smooth. The spire is swollen with a slightly pointed apex and consists of six barely convex whorls. The narrow, semi-lunar aperture has thin, sharp, and very slightly reflexed edges. The columella is encrusted over half the width of the aperture and features a strong triangular depression in the middle. At the front, the columellar angle is slightly prominent and separated from the rest of the edge by a slight notch.[2]
