Amastra porphyrostoma

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 (Paramastra) porphyrostoma (Pease, 1869) · alternative representation; Helicter (Amastra) porphyrostoma Pease, 1869 superseded combination;

Amastra porphyrostoma is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusc in the family Amastridae.^[1]

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.^[2]

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.

[WoRMS-1] Amastra porphyrostoma (Pease, 1869). 21 December 2024. Retrieved through: World Register of Marine Species.

[Hyatt-2] 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.

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