Amastra morticina

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

Amastra morticina 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 10.9 mm, its diameter 6.5 mm.

(Original description) The shell contains 6 whorls. The shell is umbilicate and somewhat thin, with a globose body whorl. The spire is straightly conic, tapering slightly near the apex. It comprises six whorls: the whorls of the protoconch are smooth and convex, while the subsequent whorls are slightly convex and finely striate. The body whorl is inflated at the periphery and base, with weak plications near the suture, giving it an irregular appearance.

The deep umbilicus is bordered by an obtuse angle and contains a distinct spiral gutter within. The aperture is small, angular at the upper end, and subangular at the base of the columella. The outer lip is slightly thickened on the inner side, while the columellar lip is straight and only minimally dilated. A small, oblique columellar lamella completes the shell's delicate structure.^[2]

Distribution

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

References

^ Amastra morticina 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. 280. 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 morticina 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. 280. 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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