| Amastra hutchinsonii | |
|---|---|
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| Shell of Amastra hutchinsonii | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. hutchinsonii |
| Binomial name | |
| Amastra hutchinsonii (Pease, 1862) | |
| Synonyms | |
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Amastra hutchinsonii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae. [1]
The length of the shell attains 24.5 mm, its diameter 7.3 mm
The shell is acuminately turrited, sinistral, and imperforate. It consists of 7 whorls that are flatly convex, coarsely and irregularly striated longitudinally, without any marginations. The sutures are somewhat rough but well-impressed. The aperture is ovate, approximately two-fifths the length of the shell. The columellar fold is slight, oblique, and tortuous. The shell is covered with an earthy brown epidermis, with the apex being darker in color. The aperture and columella are white and shining.
In Mauian specimens, the shell is typically rimate, rarely imperforate as previously described by W.H. Pease. The embryonic whorls are exquisitely costellate, with the riblets following the usual curved pattern. The later whorls display a coarse sculpture of uneven wrinkles. These whorls are covered with a thin, rusty or chestnut cuticle, under which a light yellow under-layer is exposed by wear on the wrinkles, often covered with blackish dirt. Beneath the cuticle, the shell itself is white. The columellar lamella is small and strongly oblique. [2]
This species is endemic to Hawaii, occurring on Maui island.
Amastra porcus is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Amastridae.
Amastra tenuispira is an extinct species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Amastridae.
Amastra kalamaulensis is a species of air-breathing 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 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 johnsoni 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 sola is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra antiqua is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra knudsenii is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra vetusta 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 inflata is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra kauaiensis is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
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