Amastra fragilis

Amastra fragilis
	Shell of Amastra fragilis (holotype)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Gastropoda
Order:	Stylommatophora
Family:	Amastridae
Genus:	Amastra
Species:	A. fragilis
Binomial name
	Amastra fragilis; Pilsbry & C. M. Cooke, 1914
Synonyms
	Amastra (Cyclamastra) fragilis Pilsbry & C. M. Cooke, 1914 · alternative representation

Amastra fragilis 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 9 mm, its diameter 4.7 mm.

(Original description) The thin shell is fragile, and perforate, with a narrowly ovate-conic shape. Its chestnut-brown surface is dull, barely shining, and finely irregularly striated, with occasional larger striae occurring at irregular intervals. It is often soiled with fecal matter and dirt. The summit is somewhat obtuse, and the whorls are convex, with the body whorl being obtusely angular around the narrow umbilical slit. The aperture is oval and angular at both ends, with a thin, fragile outer lip. The columellar lip is also thin and straightened, while the columellar lamella is small, thin, and very oblique, not quite extending to the edge. ^[2]

Distribution

This species is endemic to Hawaii and occurs on Molokai Island.

References

^ Amastra fragilis Pilsbry & C. M. Cooke, 1914. 27 November 2024. Retrieved through: World Register of Marine Species.
^ Pilsbry, H. A. & Cooke, C. M. (1914–1916). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 23: Appendix to Amastridae, Tornatellinidae, Index to vols. XXI-XXIII. pp. i-xi. Philadelphia: Conchological Department, Academy of Natural Sciences. p. 26. Retrieved 27 November 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 fragilis Pilsbry & C. M. Cooke, 1914. 27 November 2024. Retrieved through: World Register of Marine Species.

[2] Pilsbry, H. A. & Cooke, C. M. (1914–1916). Manual of conchology, structural and systematic, with illustrations of the species. Ser. 2, Pulmonata. Vol. 23: Appendix to Amastridae, Tornatellinidae, Index to vols. XXI-XXIII. pp. i-xi. Philadelphia: Conchological Department, Academy of Natural Sciences. p. 26. Retrieved 27 November 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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