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| The shell is dextral, imperforate, thick, and long-conic, with fine rough striae. It is covered by a notably thick, rough, brown epidermis, under which lies a thinner, smooth, brown layer. The ] is convexly conic, composed of six convex ]s. The ] is convex and accounts for half the total shell length. The suture is distinct and well-defined. | The shell is dextral, imperforate, thick, and long-conic, with fine rough striae. It is covered by a notably thick, rough, brown epidermis, under which lies a thinner, smooth, brown layer. The ] is convexly conic, composed of six convex ]s. The ] is convex and accounts for half the total shell length. The suture is distinct and well-defined. | ||
| The ] is subelliptical, slightly angular at the base. The ] is narrow and vertical, bearing a thick, lamelliform, nearly transverse fold. The outer margin is simple. Beneath the epidermis, the shell’s ground color is a yellowish tone. The columella and outer ] display a subtle purple hue, while the shell’s summit is a reddish-brown. |
The ] is subelliptical, slightly angular at the base. The ] is narrow and vertical, bearing a thick, lamelliform, nearly transverse fold. The outer margin is simple. Beneath the epidermis, the shell’s ground color is a yellowish tone. The columella and outer ] display a subtle purple hue, while the shell’s summit is a reddish-brown.<ref name="Hyatt">{{cite book |last1=Hyatt, A. & Pilsbry, H. A. |title=Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 21: Achatinellidae (Amastrinae). |date=1910–1911 |publisher=Conchological Department, Academy of Natural Sciences |location=Philadelphia |page=226|url=https://www.biodiversitylibrary.org/page/23701752 |access-date=3 December 2024}} {{source-attribution}}</ref> | ||
| ==Distribution== | ==Distribution== | ||
Revision as of 15:11, 28 December 2024
Species of mollusc
| Amastra porphyrostoma | |
|---|---|
| |
| Shell of Amastra porphyrostoma | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Stylommatophora |
| Family: | Amastridae |
| Genus: | Amastra |
| Species: | A. porphyrostoma |
| Binomial name | |
| Amastra porphyrostoma (Pease, 1869) | |
| Synonyms | |
| |
Amastra porphyrostoma is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.
Description
The length of the shell attains 20 mm, its diameter 11 mm
The shell is dextral, imperforate, thick, and long-conic, with fine rough striae. It is covered by a notably thick, rough, brown epidermis, under which lies a thinner, smooth, brown layer. The spire is convexly conic, composed of six convex whorls. The body whorl is convex and accounts for half the total shell length. The suture is distinct and well-defined.
The aperture is subelliptical, slightly angular at the base. The columella is narrow and vertical, bearing a thick, lamelliform, nearly transverse fold. The outer margin is simple. Beneath the epidermis, the shell’s ground color is a yellowish tone. The columella and outer lip display a subtle purple hue, while the shell’s summit is a reddish-brown.
Distribution
This species is endemic to Hawaii, occurring on Oahu island.
References
- Amastra porphyrostoma (Pease, 1869). 21 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. 226. Retrieved 3 December 2024.
{{cite book}}: CS1 maint: multiple names: authors list (link)
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. pp. 1–248.
{{cite book}}: CS1 maint: multiple names: authors list (link)
External links
- Pease, W.H. (1869). "Description d'espèces nouvelles du genre Helicter, habitant les îles Hawaii". Journal de Conchyliologie. 17: 172.