Amastra seminigra

Amastra seminigra
	Shell of Amastra seminigra (holotype)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Amastridae
Genus:	Amastra
Species:	A. seminigra
Binomial name
	Amastra seminigra; Hyatt & Pilsbry, 1911
Synonyms
	Amastra (Amastrella) seminigra Hyatt & Pilsbry, 1911 alternative representation

Amastra seminigra 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 21.2 mm, its diameter 10.3 mm.

(Original description) The shell contains 6½ whorls. The apical whorls are fleshy or purplish in color, transitioning to a light yellow hue on the last two whorls. These are partially or predominantly covered with a pitch-black cuticle, which may appear in scattered shreds or remain nearly intact, except near the aperture.

The interior of the shell is either white or faintly tinged with pink, adding a subtle contrast to its exterior.^[2]

Distribution

This species is endemic to Hawaii, occurring on Oahu Island.

References

^ Amastra seminigra Hyatt & Pilsbry, 1911. 3 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. 195. 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. p. 107.{{cite book}}: CS1 maint: multiple names: authors list (link)

[WoRMS-1] Amastra seminigra Hyatt & Pilsbry, 1911. 3 December 2024. Retrieved through: World Register of Marine Species.

[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. 195. 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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