| Amastra sphaerica | |
|---|---|
 | |
| Shell of Amastra sphaerica (lectotype at MNHN, Paris) | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. sphaerica |
| Binomial name | |
| Amastra sphaerica Pease, 1870 | |
| Synonyms | |
| |
Amastra sphaerica is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. [1]
The length of the shell attains 10.6 mm, its diameter 10.2 mm
The shell is narrowly umbilicate, globose-conic, and moderately solid. The spire is dull purplish-brown, transitioning to purplish-brown or chestnut on the body whorl, which fades to a brighter yellow in its final third or fourth. There are 5 moderately convex whorls, with the body whorl being very obtusely sub-angular in the anterior portion and becoming rounded toward its final segment; in mature shells, the body whorl descends noticeably to meet the aperture.
The spire's outlines are straight or show minimal tapering near the apex. The first whorl is smooth, followed by very fine, softly striate patterns on the second whorl. The last two whorls are finely and sharply striate, with the striae being irregular and unequal. The suture is distinct and well-defined. [2]
This species is endemic to Hawaii, occurring on Kauai island.
Amastra subrostrata was an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra umbilicata was a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra eos is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra aemulator is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra baldwiniana is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra elegantula is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra hawaiiensis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra morticina is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra subobscura is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra thaamuni is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra tricincta is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra undata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra decorticata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra durandi is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra inflata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra senilis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra humilis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra porphyrostoma is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra rugulosa is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra similaris is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
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