| Amastra biplicata | |
|---|---|
 | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. biplicata |
| Binomial name | |
| Amastra biplicata (Newcomb, 1854) | |
| Synonyms | |
| |
Amastra biplicata was a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae. [1]
(Original description) The shell is dextrorsal and elongately cylindrical, composed of seven rounded whorls with pronounced longitudinal striations. The suture is deep, and the small aperture is subovate. The inner lip is somewhat callous, while the columella is biplicate. The outer lip is acute and subtly submarginate internally.
The shell is rosy, partially veiled by a thin brown epidermis, with the upper whorls appearing black. The aperture interior is a vivid red. [2]
This marine species is endemic to Hawaii and occurs on Lanai Island.
Achatinella is a tropical genus of colorful land snails in the monotypic Achatinellidae subfamily Achatinellinae.
The gastropod shell is part of the body of many gastropods, including snails, a kind of mollusc. The shell is an exoskeleton, which protects from predators, mechanical damage, and dehydration, but also serves for muscle attachment and calcium storage. Some gastropods appear shell-less (slugs) but may have a remnant within the mantle, or in some cases the shell is reduced such that the body cannot be retracted within it (semi-slug). Some snails also possess an operculum that seals the opening of the shell, known as the aperture, which provides further protection. The study of mollusc shells is known as conchology. The biological study of gastropods, and other molluscs in general, is malacology. Shell morphology terms vary by species group.
Amastra albolabris was a species of air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae.
Amastra is a genus of small air-breathing land snails, terrestrial pulmonate gastropod mollusks in the family Amastridae.
Amastra cylindrica is a species of land snail, a terrestrial pulmonate gastropod mollusc in the Amastridae family.
Vertigo dedecora is a species of very small air-breathing land snail, a terrestrial pulmonate gastropod mollusk or micromollusk in the family Vertiginidae.
Mitromorpha biplicata is a species of sea snail, a marine gastropod mollusk in the family Mitromorphidae.
Daphnella interrupta is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Kermia producta is a species of sea snail, a marine gastropod mollusk in the family Raphitomidae.
Vexillum moelleri is a species of small sea snail, marine gastropod mollusk in the family Costellariidae, the ribbed miters.
Orania fischeriana is a species of sea snail, a marine gastropod mollusk in the family Muricidae, the murex snails or rock snails.
Harpa amouretta, common name the lesser harp, is a species of sea snail, a marine gastropod mollusk in the family Harpidae, the harp snails.
Monoplex pilearis, common name the hairy triton, is a species of medium-sized predatory sea snail, a marine gastropod mollusk in the family Cymatiidae.
Cossmannica aciculata is a species of sea snail, a marine gastropod mollusk in the family Pyramidellidae, the pyrams and their allies.
Cantharidus antipodum is a species of sea snail, a marine gastropod mollusk in the family Trochidae, the top snails.
Hiloa variabilis, common name the minute pheasant, is a species of small sea snail with calcareous opercula, a marine gastropod mollusk in the family Phasianellidae, the pheasant snails.
Allochroa bronnii is a species of gastropods belonging to the family Ellobiidae.
Amastra affinis is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra agglutinans is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Amastra assimilis is a species of land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
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