| Amastra elliptica | |
|---|---|
 | |
| Shells of Amastra elliptica | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. elliptica |
| Binomial name | |
| Amastra elliptica Gulick, 1873 | |
| Synonyms | |
| |
Amastra elliptica is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. [1]
The length of the shell attains 15 mm, its diameter 8.5 mm
The shell is dextral, ovate, and slightly glossy, with faint growth lines. It contains 5½, convex whorls with the first 4½ brownish-corneous and the body whorl paler. The shell is partially covered with a dark olivaceous epidermis, worn in places at the front of the body whorl. The spire is somewhat turreted, with a simple suture. The aperture is white, occasionally tinged rose-pink at the front, and sometimes entirely white. The peristome is thin and only slightly thickened internally. The columella is gracefully arcuate, with the lip-ends connected by a thin callus and bearing a compressed, subbasal tooth
Amastra elliptica is distinguished from Amastra decorticata and its allies by the well-developed outer epidermal layer. On the anterior surface of the body whorl, the epidermis is light olive-brown with numerous uneven blackish streaks. On the posterior surface, these streaks merge to form a more or less continuous black area covering approximately the last quarter of the body whorl. The underlying cuticle, visible near the aperture where the outer layer has worn away, is pale yellow. In dead specimens where the entire cuticle has eroded, the spire appears reddish, while the last whorl is white. [2]
This species is endemic to Hawaii, occurring on Oahu island.
Amastra tenuispira is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Amastridae.
Amastra affinis is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra metamorpha is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra nubigena 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 borcherdingi 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 makawaoensis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra nubifera is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra subcrassilabris 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 sykesi is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra montana is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra conifera is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra nucula 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 rubida is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra tenuilabris 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.
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