Amastra luctuosa
From Wikipedia, the free encyclopedia
| Amastra luctuosa | |
|---|---|
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| Shell of Amastra luctuosa | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. luctuosa |
| Binomial name | |
| Amastra luctuosa (L. Pfeiffer, 1856) | |
| Synonyms | |
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Amastra luctuosa is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.[1]
Subspecies: Amastra luctuosa sulphurea Ancey, 1904
The length of the shell attains 16 mm, its diameter 8 mm
The shell is imperforate, dextral, oblong-conic, and solid, with fine striations and a slight sheen. It is distinctly bicolored, with a striking contrast between light and dark tones. The spire is inflated-conic, tapering to an acute apex, and the suture is finely crenulated.
There are 6 whorls, with the upper four being black and nearly flat, the penultimate whorl pale and more convex, and the body whorl comprising about two-fifths of the total shell length. The body whorl is pale tawny above and blackish below the periphery.
The aperture is slightly oblique, sinuate-semioval, and white inside. The columellar fold is laminiform, subbasal, and triangular. The peristome is unexpanded, acute, and edged in black, adding to the shell's sharp and elegant appearance.
