| Amastra conica | |
|---|---|
| |
| Shell of Amastra conica | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. conica |
| Binomial name | |
| Amastra conica Baldwin, 1906 | |
| Synonyms | |
|
Amastra (Amastrella) conica Baldwin, 1896 alternative representation | |
Amastra conica is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
- Subspecies
- Amastra conica conica Baldwin, 1906
- Amastra conica gentilis C. M. Cooke, 1917
- Amastra conica gyrans Hyatt, 1911
- Amastra conica kohalensis Hyatt & Pilsbry, 1911
Description
The length of the shell attains 15.5 mm, its diameter 8 mm.
(Later supplemental description by Hyatt, A. & Pilsbry, H. A.) The shell is a fossil specimen. It is dextral and minutely perforated, with a thin, elongately conical shape and an acute apex. Its surface is delicately sculpted with fine growth lines, while the apical whorls exhibit radiating sulcations. The original coloration of the living shell remains unknown. Comprising seven convex whorls, the shell features a well-defined suture. The aperture is oblique and oval, framed by a simple, very thin peristome. The columella ends in a subtly developed fold.
The species was discovered within deposits of fossilized shells at a location known as Mana. The likelihood of living specimens of this species persisting to the present day or within any recent period is exceedingly low.
Distribution
This species is endemic to Hawaii, occurring on the Lanai island.
References
- Amastra conicaBaldwin, 1906. 7 December 2024. Retrieved through: World Register of Marine Species.
- Hyatt, A. & Pilsbry, H. A. (1910–1911). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 21: Achatinellidae (Amastrinae). Philadelphia: Conchological Department, Academy of Natural Sciences. p. 240. Retrieved 3 December 2024.
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This article incorporates text from this source, which is in the public domain.
- Baldwin, D.D. (1906). "Description of new species of Achatinellidae from the Hawaiian Islands". The Nautilus. 19 (12): 137–138. Retrieved 7 December 2024. This article incorporates text from this source, which is in the public domain.
- Cowie, R. H., Evenhuis, N. L. & Christensen, C. C. (1995). Catalog of the native land and freshwater molluscs of the Hawaiian Islands. vi. Leiden: Backhuys Publishers. p. 107.
{{cite book}}: CS1 maint: multiple names: authors list (link)
| Taxon identifiers | |
|---|---|
| Amastra conica | |