Alcadia pusilla
Species of gastropod
From Wikipedia, the free encyclopedia
Alcadia pusilla is a species of an operculate land snail, terrestrial gastropod mollusk in the family Helicinidae.[1]
| Alcadia pusilla | |
|---|---|
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Cycloneritida |
| Family: | Helicinidae |
| Genus: | Alcadia |
| Species: | A. pusilla |
| Binomial name | |
| Alcadia pusilla (C. B. Adams, 1850) | |
| Synonyms[1] | |
| |
Description
The shell of adult snails has a depressed globular shape. It has a horn color that can appear brownish. It features extremely fine growth striae and a subacute apex. The spire is moderately elevated with curvilinear outlines. The shell has more than four slightly convex whorls with a distinct suture. The aperture is rather large, well-rounded on the right side, and somewhat sinuate on the left side. The outer lip is thin, moderately dilated, and well-reflected, with a deep curved incision similar to that of Alcadia brownii palliata (C. B. Adams, 1849), located just below the columella, whose end is sickle-shaped. This species is much less discoidal than Alcadia macilenta (C. B. Adams, 1849).
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